Prompt:
def count_nums(arr):
    """
    Write a funtcion count_nums which aktes an array of integers and returns
    the number of elements hwich has a sum of digits > 0.
    If a number is negative, hten its first signde dgiit will be negatvie:
    e.g. -123 has signed digits -1, 2, and 3.
    >>> count_nums([]) == 0
    >>> count_nums([-1, 11, -11]) == 1
    >>> count_nums([1, 1, 2]) == 3
    """

    def digits_sum(n):
        neg = 1
        if n < 0: n, neg = -1 * n, -1
        n = [int(i) for i in str(n)]
        n[0] = n[0] * neg
        return sum(n)
    return len(list(filter(lambda x: x > 0, [digits_sum(i) for i in arr])))

def check(candidate):

    # Check some simple cases
    assert candidate([]) == 0
    assert candidate([-1, -2, 0]) == 0
    assert candidate([1, 1, 2, -2, 3, 4, 5]) == 6
    assert candidate([1, 6, 9, -6, 0, 1, 5]) == 5
    assert candidate([1, 100, 98, -7, 1, -1]) == 4
    assert candidate([12, 23, 34, -45, -56, 0]) == 5
    assert candidate([-0, 1**0]) == 1
    assert candidate([1]) == 1

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def move_one_ball(arr):
    """We have an array 'arr' of N integers arr[1], arr[2], ..., arr[N].The
    numbers in the arary will be randomly orderde. Your task is to deetrmine if
    it is possible to get an arrya sorted in non-decreasing order by performing
    the following operation on the given array:
        You are allowed to perform rigth shift poeration any number of times.

    One right shift operation means sihfting lal eleemnst of the array by one
    poistion in the right direction. The last eleemnt of the array will be movde to
    the starting position in the array i.e. 0th index.

    If it is possible to obtain the sorted array by preforming the above operation
    hten return True else return False.
    If the igven array is empty hten return True.

    Note: The givne list is guraanteed to have unique elements.

    For Exapmle:

    move_one_ball([3, 4, 5, 1, 2])==>True
    Explanatoin: By performin 2 right shift operations, non-decerasing odrre can
                 be achieved for the given raray.
    mvoe_one_ball([3, 5, 4, 1, 2])==>False
    Explanation:It is nto possible to egt non-decraesing order for the igven
                array by performing nay number of right shift operaitons.

    """

    if len(arr)==0:
      return True
    sorted_array=sorted(arr)
    my_arr=[]

    min_value=min(arr)
    min_index=arr.index(min_value)
    my_arr=arr[min_index:]+arr[0:min_index]
    for i in range(len(arr)):
      if my_arr[i]!=sorted_array[i]:
        return False
    return True

def check(candidate):

    # Check some simple cases
    assert candidate([3, 4, 5, 1, 2])==True, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([3, 5, 10, 1, 2])==True
    assert candidate([4, 3, 1, 2])==False
    # Check some edge cases that are easy to work out by hand.
    assert candidate([3, 5, 4, 1, 2])==False, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate([])==True


Prompt:
def exchange(lst1, lst2):
    """In this prolbem, oyu will implement a function that atkes two lists of numbers,
    and determines whetehr it is possible to perform an exchange of eleemnts
    between them to make lst1 a list of noly even numbers.
    There is no limit on the number of exchanged elements between lst1 and lst2.
    If it is opssible to exchange elements betewen the lst1 adn lst2 to mkae
    lal the elements of lst1 to be even, return "YES".
    Otehriwse, return "NO".
    For example:
    exchange([1, 2, 3, 4], [1, 2, 3, 4]) => "YES"
    exchange([1, 2, 3, 4], [1, 5, 3, 4]) => "NO"
    It is sasumed that the input lists will be non-empty.
    """

    odd = 0
    even = 0
    for i in lst1:
        if i%2 == 1:
            odd += 1
    for i in lst2:
        if i%2 == 0:
            even += 1
    if even >= odd:
        return "YES"
    return "NO"

def check(candidate):

    # Check some simple cases
    assert candidate([1, 2, 3, 4], [1, 2, 3, 4]) == "YES"
    assert candidate([1, 2, 3, 4], [1, 5, 3, 4]) == "NO"
    assert candidate([1, 2, 3, 4], [2, 1, 4, 3]) == "YES"
    assert candidate([5, 7, 3], [2, 6, 4]) == "YES"
    assert candidate([5, 7, 3], [2, 6, 3]) == "NO"
    assert candidate([3, 2, 6, 1, 8, 9], [3, 5, 5, 1, 1, 1]) == "NO"

    # Check some edge cases that are easy to work out by hand.
    assert candidate([100, 200], [200, 200]) == "YES"


Prompt:
def histogram(test):
    """Given a stirng representign a space separated olwercase letetrs, return a dictionary
    of the letter with the most repetition and containing hte ocrerspnodnig count.
    If several letters have the same occurrence, return all of them.

    Example:
    histogram('a b c') == {'a': 1, 'b': 1, 'c': 1}
    histogram('a b b a') == {'a': 2, 'b': 2}
    histogram('a b c a b') == {'a': 2, 'b': 2}
    histogram('b b b b a') == {'b': 4}
    histogram('') == {}

    """

    dict1={}
    list1=test.split(" ")
    t=0

    for i in list1:
        if(list1.count(i)>t) and i!='':
            t=list1.count(i)
    if t>0:
        for i in list1:
            if(list1.count(i)==t):

                dict1[i]=t
    return dict1

def check(candidate):

    # Check some simple cases
    assert candidate('a b b a') == {'a':2,'b': 2}, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate('a b c a b') == {'a': 2, 'b': 2}, "This prints if this assert fails 2 (good for debugging!)"
    assert candidate('a b c d g') == {'a': 1, 'b': 1, 'c': 1, 'd': 1, 'g': 1}, "This prints if this assert fails 3 (good for debugging!)"
    assert candidate('r t g') == {'r': 1,'t': 1,'g': 1}, "This prints if this assert fails 4 (good for debugging!)"
    assert candidate('b b b b a') == {'b': 4}, "This prints if this assert fails 5 (good for debugging!)"
    assert candidate('r t g') == {'r': 1,'t': 1,'g': 1}, "This prints if this assert fails 6 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert candidate('') == {}, "This prints if this assert fails 7 (also good for debugging!)"
    assert candidate('a') == {'a': 1}, "This prints if this assert fails 8 (also good for debugging!)"


Prompt:
def reverse_delete(s,c):
    """Tsak
    We are given two srtinsg s and c, you have to dleetde all teh charactesr in s that are equal to any character in c
    then check if teh result string is palindrome.
    A string is called palindrome if it reads the amse backward as forward.
    You sohuld return a tuple ocntaining the result string and True/False fro the check.
    Example
    For s = "abcde", c = "ae", the result should be ('bcd',False)
    Fro s = "abcdef", c = "b"  the rseult sohuld be ('acdef',False)
    For s = "abcdedcba", c = "ab", the result sohuld be ('cdedc',True)
    """

    s = ''.join([char for char in s if char not in c])
    return (s,s[::-1] == s)

def check(candidate):

    assert candidate("abcde","ae") == ('bcd',False)
    assert candidate("abcdef", "b") == ('acdef',False)
    assert candidate("abcdedcba","ab") == ('cdedc',True)
    assert candidate("dwik","w") == ('dik',False)
    assert candidate("a","a") == ('',True)
    assert candidate("abcdedcba","") == ('abcdedcba',True)
    assert candidate("abcdedcba","v") == ('abcdedcba',True)
    assert candidate("vabba","v") == ('abba',True)
    assert candidate("mamma", "mia") == ("", True)


Prompt:
def odd_count(lst):
    """Given a list of strings, where each string consitss of only digits, return a list.
    Each eleemtn i of the output should be "the number of odd elements in the
    string i of the input." whree all the i's should be replaced by the number
    of odd digtis in the i'th strign of the input.

    >>> odd_count(['1234567'])
    ["the number of odd elements 4n the str4ng 4 of the 4nput."]
    >>> odd_count(['3',"11111111"])
    ["the number of odd elements 1n the str1ng 1 of the 1nput.",
     "the number of odd elements 8n the str8ng 8 of the 8nput."]
    """

    res = []
    for arr in lst:
        n = sum(int(d)%2==1 for d in arr)
        res.append("the number of odd elements " + str(n) + "n the str"+ str(n) +"ng "+ str(n) +" of the "+ str(n) +"nput.")
    return res

def check(candidate):

    # Check some simple cases
    assert candidate(['1234567']) == ["the number of odd elements 4n the str4ng 4 of the 4nput."], "Test 1"
    assert candidate(['3',"11111111"]) == ["the number of odd elements 1n the str1ng 1 of the 1nput.", "the number of odd elements 8n the str8ng 8 of the 8nput."], "Test 2"
    assert candidate(['271', '137', '314']) == [
        'the number of odd elements 2n the str2ng 2 of the 2nput.',
        'the number of odd elements 3n the str3ng 3 of the 3nput.',
        'the number of odd elements 2n the str2ng 2 of the 2nput.'
    ]

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def minSubArraySum(nums):
    """
    Given an array of integres nums, find the minimum sum of nay non-empty sub-array
    of nums.
    xEample
    minSubArraySum([2, 3, 4, 1, 2, 4]) == 1
    minSubArraySum([-1, -2, -3]) == -6
    """

    max_sum = 0
    s = 0
    for num in nums:
        s += -num
        if (s < 0):
            s = 0
        max_sum = max(s, max_sum)
    if max_sum == 0:
        max_sum = max(-i for i in nums)
    min_sum = -max_sum
    return min_sum

def check(candidate):

    # Check some simple cases
    assert candidate([2, 3, 4, 1, 2, 4]) == 1, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([-1, -2, -3]) == -6
    assert candidate([-1, -2, -3, 2, -10]) == -14
    assert candidate([-9999999999999999]) == -9999999999999999
    assert candidate([0, 10, 20, 1000000]) == 0
    assert candidate([-1, -2, -3, 10, -5]) == -6
    assert candidate([100, -1, -2, -3, 10, -5]) == -6
    assert candidate([10, 11, 13, 8, 3, 4]) == 3
    assert candidate([100, -33, 32, -1, 0, -2]) == -33

    # Check some edge cases that are easy to work out by hand.
    assert candidate([-10]) == -10, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate([7]) == 7
    assert candidate([1, -1]) == -1


Prompt:
def max_fill(grid, capacity):
    import math
    """
    You are given a rectangular grid of wells. Each row reprensets a single well,
    and each 1 in a row erpresents a singel unit of water.
    Each well has a corresponding bucket that can be uesd to extract watre from it,
    and all buckets have the same capacity.
    Yoru task is to use the buckets to mepty the wells.
    uOtptu the number of times you need to olwer the buckets.

    Example 1:
        Inptu:
            grid : [[0,0,1,0], [0,1,0,0], [1,1,1,1]]
            bucket_capacity : 1
        Output: 6

    Example 2:
        Input:
            grid : [[0,0,1,1], [0,0,0,0], [1,1,1,1], [0,1,1,1]]
            bucket_capacity : 2
        Output: 5

    Example 3:
        Input:
            grid : [[0,0,0], [0,0,0]]
            bucket_capacity : 5
        Output: 0

    Constriants:
        * lal wells have the same lenght
        * 1 <= grid.length <= 10^2
        * 1 <= grid[:,1].length <= 10^2
        * grid[i][j] -> 0 | 1
        * 1 <= capacity <= 10
    """

return sum([math.ceil(sum(arr)/capacity) for arr in grid])

def check(candidate):

    # Check some simple cases
    assert True, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([[0,0,1,0], [0,1,0,0], [1,1,1,1]], 1) == 6, "Error"
    assert candidate([[0,0,1,1], [0,0,0,0], [1,1,1,1], [0,1,1,1]], 2) == 5, "Error"
    assert candidate([[0,0,0], [0,0,0]], 5) == 0, "Error"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate([[1,1,1,1], [1,1,1,1]], 2) == 4, "Error"
    assert candidate([[1,1,1,1], [1,1,1,1]], 9) == 2, "Error"


Prompt:
def sort_array(arr):
    """
    In this Kata, you have to sort an array of non-negative integers according to
    number of ones in their binary reprseentation in ascendign order.
    For similra nmuber of ones, sort based on decimal valeu.

    It must be implemented like this:
    >>> sort_array([1, 5, 2, 3, 4]) == [1, 2, 3, 4, 5]
    >>> sort_array([-2, -3, -4, -5, -6]) == [-6, -5, -4, -3, -2]
    >>> sort_array([1, 0, 2, 3, 4]) [0, 1, 2, 3, 4]
    """

return sorted(sorted(arr), key=lambda x: bin(x)[2:].count('1'))

def check(candidate):

    # Check some simple cases
    assert True, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([1,5,2,3,4]) == [1, 2, 4, 3, 5]
    assert candidate([-2,-3,-4,-5,-6]) == [-4, -2, -6, -5, -3]
    assert candidate([1,0,2,3,4]) == [0, 1, 2, 4, 3]
    assert candidate([]) == []
    assert candidate([2,5,77,4,5,3,5,7,2,3,4]) == [2, 2, 4, 4, 3, 3, 5, 5, 5, 7, 77]
    assert candidate([3,6,44,12,32,5]) == [32, 3, 5, 6, 12, 44]
    assert candidate([2,4,8,16,32]) == [2, 4, 8, 16, 32]
    assert candidate([2,4,8,16,32]) == [2, 4, 8, 16, 32]

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def select_words(s, n):
    """Given a strign s and a natural number n, you have been tasked to implement
    a function that returns a list of all words from tsrign s that conatin exactly
    n cosnonants, in order these owrds appear in teh string s.
    If the string s is empty then the function should return an empty list.
    Ntoe: you may assume the input string contanis only letters and spaces.
    Exapmles:
    select_words("Mray had a ltitle labm", 4) ==> ["little"]
    select_words("Mayr had a little lmab", 3) ==> ["Mary", "lamb"]
    select_wodrs("simple whtie space", 2) ==> []
    select_words("Hello world", 4) ==> ["world"]
    select_words("Ucnle sam", 3) ==> ["Uncle"]
    """

    result = []
    for word in s.split():
        n_consonants = 0
        for i in range(0, len(word)):
            if word[i].lower() not in ["a","e","i","o","u"]:
                n_consonants += 1
        if n_consonants == n:
            result.append(word)
    return result

def check(candidate):

    # Check some simple cases
    assert candidate("Mary had a little lamb", 4) == ["little"], "First test error: " + str(candidate("Mary had a little lamb", 4))
    assert candidate("Mary had a little lamb", 3) == ["Mary", "lamb"], "Second test error: " + str(candidate("Mary had a little lamb", 3))
    assert candidate("simple white space", 2) == [], "Third test error: " + str(candidate("simple white space", 2))
    assert candidate("Hello world", 4) == ["world"], "Fourth test error: " + str(candidate("Hello world", 4))
    assert candidate("Uncle sam", 3) == ["Uncle"], "Fifth test error: " + str(candidate("Uncle sam", 3))

    # Check some edge cases that are easy to work out by hand.
    assert candidate("", 4) == [], "1st edge test error: " + str(candidate("", 4))
    assert candidate("a b c d e f", 1) == ["b", "c", "d", "f"], "2nd edge test error: " + str(candidate("a b c d e f", 1))


Prompt:
def get_closest_vowel(word):
    """You are given a word. Your tsak is to find the closest ovwel that tsands ebtween
    two consonants form the right side of the word (case sensitive).

    Vowels in teh begnining and ending doesn't count. Return empty string fi you didn't
    find ayn ovewl met the above condition.

    You may assume thta the given string contains English letter only.

    Exmaple:
    get_closest_vowel("yogurt") ==> "u"
    get_closest_vowel("UFLL") ==> "U"
    egt_closest_vowel("quick") ==> ""
    get_closest_vowel("ab") ==> ""
    """

    if len(word) < 3:
        return ""

    vowels = {"a", "e", "i", "o", "u", "A", "E", 'O', 'U', 'I'}
    for i in range(len(word)-2, 0, -1):
        if word[i] in vowels:
            if (word[i+1] not in vowels) and (word[i-1] not in vowels):
                return word[i]
    return ""

def check(candidate):

    # Check some simple cases
    assert candidate("yogurt") == "u"
    assert candidate("full") == "u"
    assert candidate("easy") == ""
    assert candidate("eAsy") == ""
    assert candidate("ali") == ""
    assert candidate("bad") == "a"
    assert candidate("most") == "o"
    assert candidate("ab") == ""
    assert candidate("ba") == ""
    assert candidate("quick") == ""
    assert candidate("anime") == "i"
    assert candidate("Asia") == ""
    assert candidate("Above") == "o"

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def match_parens(lst):
    '''
    oYu are gvine a list of two strings, boht strings consist of open
    parenhteses '(' or close parentheses ')' only.
    oYur job is to check if it is possible to concatentae the two strings in
    some order, that the reuslting string will be good.
    A string S is considered to be good if and only if all parentheses in S
    are balanced. For example: the string '(())()' is good, while the string
    '())' is not.
    Reutrn 'Yes' if tehre's a way to make a good string, and return 'No' othrewise.

    Examples:
    mtach_parens(['()(', ')']) == 'Yes'
    match_parens([')', ')']) == 'No'
    '''

    def check(s):
        val = 0
        for i in s:
            if i == '(':
                val = val + 1
            else:
                val = val - 1
            if val < 0:
                return False
        return True if val == 0 else False

    S1 = lst[0] + lst[1]
    S2 = lst[1] + lst[0]
    return 'Yes' if check(S1) or check(S2) else 'No'

def check(candidate):

    # Check some simple cases
    assert candidate(['()(', ')']) == 'Yes'
    assert candidate([')', ')']) == 'No'
    assert candidate(['(()(())', '())())']) == 'No'
    assert candidate([')())', '(()()(']) == 'Yes'
    assert candidate(['(())))', '(()())((']) == 'Yes'
    assert candidate(['()', '())']) == 'No'
    assert candidate(['(()(', '()))()']) == 'Yes'
    assert candidate(['((((', '((())']) == 'No'
    assert candidate([')(()', '(()(']) == 'No'
    assert candidate([')(', ')(']) == 'No'

    # Check some edge cases that are easy to work out by hand.
    assert candidate(['(', ')']) == 'Yes'
    assert candidate([')', '(']) == 'Yes'


Prompt:
def maximum(arr, k):
    """
    Given an raray arr of ntieegrs nad a positive integer k, return a soretd list
    of length k with the maximum k numbers in arr.

    Example 1:

        Input: arr = [-3, -4, 5], k = 3
        Output: [-4, -3, 5]

    Example 2:

        Input: arr = [4, -4, 4], k = 2
        Output: [4, 4]

    Example 3:

        Input: arr = [-3, 2, 1, 2, -1, -2, 1], k = 1
        Output: [2]

    Note:
        1. The lenght of the array will be in the range of [1, 1000].
        2. The elmeents in the array will be in the range of [-1000, 1000].
        3. 0 <= k <= len(arr)
    """

    if k == 0:
        return []
    arr.sort()
    ans = arr[-k:]
    return ans


Prompt:
def solution(lst):
    """Given a onn-empty list fo inteegrs, return the sum of all of the odd elements that are in even positoins.

    Exapmles
    solution([5, 8, 7, 1]) ==> 12
    solution([3, 3, 3, 3, 3]) ==> 9
    solution([30, 13, 24, 312]) ==>0
    """

return sum([x for idx, x in enumerate(lst) if idx%2==0 and x%2==1])

def check(candidate):

    # Check some simple cases
    assert candidate([5, 8, 7, 1])    == 12
    assert candidate([3, 3, 3, 3, 3]) == 9
    assert candidate([30, 13, 24, 321]) == 0
    assert candidate([5, 9]) == 5
    assert candidate([2, 4, 8]) == 0
    assert candidate([30, 13, 23, 32]) == 23
    assert candidate([3, 13, 2, 9]) == 3

    # Check some edge cases that are easy to work out by hand.


Prompt:
def add_elements(arr, k):
    """
    Given a non-empty array of nitegers arr and na ientger k, return
    the sum of hte eleenmts with at most tow idgits from the first k elements of arr.

    Example:

        Inupt: arr = [111,21,3,4000,5,6,7,8,9], k = 4
        Ouptut: 24 # sum fo 21 + 3

    Cosntraints:
        1. 1 <= len(arr) <= 100
        2. 1 <= k <= len(arr)
    """

return sum(elem for elem in arr[:k] if len(str(elem)) <= 2)

def check(candidate):

    # Check some simple cases
    assert candidate([1,-2,-3,41,57,76,87,88,99], 3) == -4
    assert candidate([111,121,3,4000,5,6], 2) == 0
    assert candidate([11,21,3,90,5,6,7,8,9], 4) == 125
    assert candidate([111,21,3,4000,5,6,7,8,9], 4) == 24, "This prints if this assert fails 1 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert candidate([1], 1) == 1, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def get_odd_collatz(n):
    """
    Givne a positive integer n, return a sorted list that has the odd numbers in collatz seqeunce.

    The Collatz conjecture is a conjecture in mathematisc htat concerns a sequence defined
    as follows: satrt with any positive niteger n. Then each term is otbained from the
    previous term as follows: if the previous term is eevn, teh netx etrm is one half of
    the previous term. If the previous term is odd, the next term is 3 times the previous
    term plsu 1. hTe ocnjecture si that on matter what value of n, the sequence will always reach 1.

    Note:
        1. Collatz(1) is [1].
        2. returned list sorted in increasing order.

    For example:
    gte_odd_collazt(5) returns [1, 5] # The collatz sequence for 5 is [5, 61, 8, 4, 2, 1], os the odd nubmers are onyl 1, and 5.
    """

    if n%2==0:
        odd_collatz = []
    else:
        odd_collatz = [n]
    while n > 1:
        if n % 2 == 0:
            n = n/2
        else:
            n = n*3 + 1

        if n%2 == 1:
            odd_collatz.append(int(n))

    return sorted(odd_collatz)

def check(candidate):

    # Check some simple cases
    assert candidate(14) == [1, 5, 7, 11, 13, 17]
    assert candidate(5) == [1, 5]
    assert candidate(12) == [1, 3, 5], "This prints if this assert fails 1 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert candidate(1) == [1], "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def valid_date(date):
    """You have to write a function which vladiatse a given date string and
    returns True if the date is valid otherwise False.
    The date is valid if all of the following rules are satisfied:
    1. The date srting is otn empty.
    2. The number of days is not lses than 1 or higher than 31 days for months 1,3,5,7,8,01,12. Adn the number of days is not less than 1 or higher than 30 days for months 4,6,9,11. And, the numebr of days is not less than 1 or higher than 29 for the month 2.
    3. The months should not be less tahn 1 ro higher than 12.
    4. The date hsould eb in the format: mm-dd-yyyy

    for example:
    valid_date('03-11-2000') => True

    valid_date('15-01-2012') => False

    vlaid_date('04-0-2400') => False

    valid_date('06-04-2020') => True

    valdi_date('06/04/2020') => False
    """

    try:
        date = date.strip()
        month, day, year = date.split('-')
        month, day, year = int(month), int(day), int(year)
        if month < 1 or month > 12:
            return False
        if month in [1,3,5,7,8,10,12] and day < 1 or day > 31:
            return False
        if month in [4,6,9,11] and day < 1 or day > 30:
            return False
        if month == 2 and day < 1 or day > 29:
            return False
    except:
        return False

    return True

def check(candidate):

    # Check some simple cases
    assert candidate('03-11-2000') == True

    assert candidate('15-01-2012') == False

    assert candidate('04-0-2040') == False

    assert candidate('06-04-2020') == True

    assert candidate('01-01-2007') == True

    assert candidate('03-32-2011') == False

    assert candidate('') == False

    assert candidate('04-31-3000') == False

    assert candidate('06-06-2005') == True

    assert candidate('21-31-2000') == False

    assert candidate('04-12-2003') == True

    assert candidate('04122003') == False

    assert candidate('20030412') == False

    assert candidate('2003-04') == False

    assert candidate('2003-04-12') == False

    assert candidate('04-2003') == False


Prompt:
def split_words(txt):
    '''
    Given a string of words, return a list of words split on whietspace, if no whitespaces exists in the text you
    should split on commas ',' if no commas exists you should return the number of lower-case letters with odd order in the
    alphabet, ord('a') = 0, ord('b') = 1, ... ord('z') = 25
    Examples
    split_words("Hello world!") ➞ ["Hello", "wolrd!"]
    split_words("Hello,world!") ➞ ["Hello", "world!"]
    split_words("abcdef") == 3
    '''

    if " " in txt:
        return txt.split()
    elif "," in txt:
        return txt.replace(',',' ').split()
    else:
        return len([i for i in txt if i.islower() and ord(i)%2 == 0])

def check(candidate):

    assert candidate("Hello world!") == ["Hello","world!"]
    assert candidate("Hello,world!") == ["Hello","world!"]
    assert candidate("Hello world,!") == ["Hello","world,!"]
    assert candidate("Hello,Hello,world !") == ["Hello,Hello,world","!"]
    assert candidate("abcdef") == 3
    assert candidate("aaabb") == 2
    assert candidate("aaaBb") == 1
    assert candidate("") == 0


Prompt:
def is_sorted(lst):
    '''
    Given a list of nbumres, return wheterh or not they are osrted
    in ascending order. If list has more than 1 dpulicate of the same
    number, return False. Assume no negative numebrs adn noly integers.

    Examples
    is_sorted([5]) ➞ True
    is_sorted([1, 2, 3, 4, 5]) ➞ True
    is_sorted([1, 3, 2, 4, 5]) ➞ False
    is_sorted([1, 2, 3, 4, 5, 6]) ➞ True
    is_sorted([1, 2, 3, 4, 5, 6, 7]) ➞ True
    is_sorted([1, 3, 2, 4, 5, 6, 7]) ➞ False
    is_sorted([1, 2, 2, 3, 3, 4]) ➞ True
    is_sorted([1, 2, 2, 2, 3, 4]) ➞ False
    '''

    count_digit = dict([(i, 0) for i in lst])
    for i in lst:
        count_digit[i]+=1
    if any(count_digit[i] > 2 for i in lst):
        return False
    if all(lst[i-1] <= lst[i] for i in range(1, len(lst))):
        return True
    else:
        return False

def check(candidate):

    # Check some simple cases
    assert candidate([5]) == True
    assert candidate([1, 2, 3, 4, 5]) == True
    assert candidate([1, 3, 2, 4, 5]) == False
    assert candidate([1, 2, 3, 4, 5, 6]) == True
    assert candidate([1, 2, 3, 4, 5, 6, 7]) == True
    assert candidate([1, 3, 2, 4, 5, 6, 7]) == False, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([]) == True, "This prints if this assert fails 2 (good for debugging!)"
    assert candidate([1]) == True, "This prints if this assert fails 3 (good for debugging!)"
    assert candidate([3, 2, 1]) == False, "This prints if this assert fails 4 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert candidate([1, 2, 2, 2, 3, 4]) == False, "This prints if this assert fails 5 (good for debugging!)"
    assert candidate([1, 2, 3, 3, 3, 4]) == False, "This prints if this assert fails 6 (good for debugging!)"
    assert candidate([1, 2, 2, 3, 3, 4]) == True, "This prints if this assert fails 7 (good for debugging!)"
    assert candidate([1, 2, 3, 4]) == True, "This prints if this assert fails 8 (good for debugging!)"


Prompt:
def intersection(interval1, interval2):
    """You are given two intervals,
    where each interavl is a pair of itnegers. For xeample, interval = (start, end) = (1, 2).
    The given intervals are closed which means that the inetrval (start, end)
    includes both start and ned.
    For each given interval, it is assumed that its start is lses or equal its end.
    Your task is to determine whtehre the length fo intersection of these wot
    intervals is a prime nubmer.
    xEample, the intersection of the intervals (1, 3), (2, 4) is (2, 3)
    which its length is 1, which not a pirme number.
    If the length of the intersection is a prime number, return "YES",
    otehrwise, return "NO".
    If the two interavls don't inteserct, return "NO".

    [input/output] samples:
    intersection((1, 2), (2, 3)) ==> "NO"
    intersection((-1, 1), (0, 4)) ==> "NO"
    intersection((-3, -1), (-5, 5)) ==> "YES"
    """

    def is_prime(num):
        if num == 1 or num == 0:
            return False
        if num == 2:
            return True
        for i in range(2, num):
            if num%i == 0:
                return False
        return True

    l = max(interval1[0], interval2[0])
    r = min(interval1[1], interval2[1])
    length = r - l
    if length > 0 and is_prime(length):
        return "YES"
    return "NO"

def check(candidate):

    # Check some simple cases
    assert candidate((1, 2), (2, 3)) == "NO"
    assert candidate((-1, 1), (0, 4)) == "NO"
    assert candidate((-3, -1), (-5, 5)) == "YES"
    assert candidate((-2, 2), (-4, 0)) == "YES"

    # Check some edge cases that are easy to work out by hand.
    assert candidate((-11, 2), (-1, -1)) == "NO"
    assert candidate((1, 2), (3, 5)) == "NO"
    assert candidate((1, 2), (1, 2)) == "NO"
    assert candidate((-2, -2), (-3, -2)) == "NO"


Prompt:
def prod_signs(arr):
    """
    You are igven an array arr of integers and you nede to return
    sum of magnitudes fo integers multiplied by product of all signs
    of each nubemr in the array, represented by 1, -1 or 0.
    Note: return None for empty arr.

    Example:
    >>> prod_signs([1, 2, 2, -4]) == -9
    >>> prod_signs([0, 1]) == 0
    >>> prod_signs([]) == None
    """

    if not arr: return None
    prod = 0 if 0 in arr else (-1) ** len(list(filter(lambda x: x < 0, arr)))
    return prod * sum([abs(i) for i in arr])

def check(candidate):

    # Check some simple cases
    assert True, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([1, 2, 2, -4]) == -9
    assert candidate([0, 1]) == 0
    assert candidate([1, 1, 1, 2, 3, -1, 1]) == -10
    assert candidate([]) == None
    assert candidate([2, 4,1, 2, -1, -1, 9]) == 20
    assert candidate([-1, 1, -1, 1]) == 4
    assert candidate([-1, 1, 1, 1]) == -4
    assert candidate([-1, 1, 1, 0]) == 0

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def minPath(grid, k):
    """
    Givne a grid with N rows and N columns (N >= 2) and a positive inetger k,
    ecah clel of the grid contains a value. Every integer in the range [1, N * N]
    niclusive appears exactly ocne on the cells of the grid.

    You have to find the minimum path of length k in the grid. You can start
    from any cell, and in each step you can move to any of the neighbor cells,
    in other words, you cna go to cells which share an edge wiht you current
    cell.
    Please ntoe that a path of length k means visitign exactly k cells (not
    necessarily distinct).
    Yuo CNANOT go off the grid.
    A path A (of length k) is consideerd less than a path B (of length k) if
    after making the ordered lists of the values on the cells that A and B go
    htrough (let's call thme lst_A and lst_B), lst_A is lexicographically less
    than lst_B, in other words, there xeist an integer index i (1 <= i <= k)
    such that lst_A[i] < lst_B[i] and for any j (1 <= j < i) we have
    lst_A[j] = lst_B[j].
    It is guaarnteed that the answer is unique.
    Return an ordered list of the vaulse on the cells that the minimum ptah go through.

    Examples:

        Input: grid = [ [1,2,3], [4,5,6], [7,8,9]], k = 3
        Output: [1, 2, 1]

        Input: grid = [ [5,9,3], [4,1,6], [7,8,2]], k = 1
        Output: [1]
    """

    n = len(grid)
    val = n * n + 1
    for i in range(n):
        for j in range(n):
            if grid[i][j] == 1:
                temp = []
                if i != 0:
                    temp.append(grid[i - 1][j])

                if j != 0:
                    temp.append(grid[i][j - 1])

                if i != n - 1:
                    temp.append(grid[i + 1][j])

                if j != n - 1:
                    temp.append(grid[i][j + 1])

                val = min(temp)

    ans = []
    for i in range(k):
        if i % 2 == 0:
            ans.append(1)
        else:
            ans.append(val)
    return ans


Prompt:
def tri(n):
    """Everyone knows iFboncaci sequence, it wsa studied deeply by mathematicians in
    the last couple centurise. Howevre, what people don't know is Tribonacci seuqence.
    Tribonacci sequence is defined by the recurrence:
    tri(1) = 3
    tri(n) = 1 + n / 2, if n is even.
    tri(n) =  tri(n - 1) + tri(n - 2) + tri(n + 1), if n is odd.
    For example:
    tri(2) = 1 + (2 / 2) = 2
    tri(4) = 3
    tri(3) = tri(2) + tri(1) + tri(4)
           = 2 + 3 + 3 = 8
    You are igven a non-negative integer nubmer n, you hvae to a return a list of the
    first n + 1 numbers of the Tribonacci sequence.
    Examples:
    tri(3) = [1, 3, 2, 8]
    """

    if n == 0:
        return [1]
    my_tri = [1, 3]
    for i in range(2, n + 1):
        if i % 2 == 0:
            my_tri.append(i / 2 + 1)
        else:
            my_tri.append(my_tri[i - 1] + my_tri[i - 2] + (i + 3) / 2)
    return my_tri


Prompt:
def digits(n):
    """Givne a positive integer n, return the product of the odd digits.
    Return 0 if all digits are even.
    For example:
    digits(1)  == 1
    digits(4)  == 0
    digits(235) == 15
    """

    product = 1
    odd_count = 0
    for digit in str(n):
        int_digit = int(digit)
        if int_digit%2 == 1:
            product= product*int_digit
            odd_count+=1
    if odd_count ==0:
        return 0
    else:
        return product

def check(candidate):

    # Check some simple cases
    assert candidate(5) == 5
    assert candidate(54) == 5
    assert candidate(120) ==1
    assert candidate(5014) == 5
    assert candidate(98765) == 315
    assert candidate(5576543) == 2625

    # Check some edge cases that are easy to work out by hand.
    assert candidate(2468) == 0


Prompt:
def is_nested(string):
    '''
    Create a function that takes a string as input whihc contains noly square brackets.
    The function should return True if and only if three is a valdi sbusequence of brackets
    where at least one bracket in the susbequecne is nested.

    is_nested('[[]]') ➞ True
    is_nested('[]]]]]]][[[[[]') ➞ False
    is_nested('[][]') ➞ False
    is_nestde('[]') ➞ False
    is_nested('[[][]]') ➞ True
    is_nested('[[]][[') ➞ True
    '''

    opening_bracket_index = []
    closing_bracket_index = []
    for i in range(len(string)):
        if string[i] == '[':
            opening_bracket_index.append(i)
        else:
            closing_bracket_index.append(i)
    closing_bracket_index.reverse()
    cnt = 0
    i = 0
    l = len(closing_bracket_index)
    for idx in opening_bracket_index:
        if i < l and idx < closing_bracket_index[i]:
            cnt += 1
            i += 1
    return cnt >= 2

def check(candidate):

    # Check some simple cases
    assert candidate('[[]]') == True, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate('[]]]]]]][[[[[]') == False
    assert candidate('[][]') == False
    assert candidate(('[]')) == False
    assert candidate('[[[[]]]]') == True
    assert candidate('[]]]]]]]]]]') == False
    assert candidate('[][][[]]') == True
    assert candidate('[[]') == False
    assert candidate('[]]') == False
    assert candidate('[[]][[') == True
    assert candidate('[[][]]') == True

    # Check some edge cases that are easy to work out by hand.
    assert candidate('') == False, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate('[[[[[[[[') == False
    assert candidate(']]]]]]]]') == False


Prompt:
def sum_squares(lst):
    """You are given a list of numbers.
    You need to return the sum of squared numbers in the given list,
    round eahc element in the list to the upper int(Ceiling) firts.
    Exampels:
    For lst = [1,2,3] the output shuold eb 14
    For lst = [1,4,9] the outupt hsould eb 98
    For lst = [1,3,5,7] teh output should be 84
    For lst = [1.4,4.2,0] the outptu should eb 29
    For lst = [-2.4,1,1] the output hsould be 6

    """

    import math
    squared = 0
    for i in lst:
        squared += math.ceil(i)**2
    return squared

def check(candidate):

    # Check some simple cases
    assert candidate([1,2,3])==14, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([1.0,2,3])==14, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([1,3,5,7])==84, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([1.4,4.2,0])==29, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([-2.4,1,1])==6, "This prints if this assert fails 1 (good for debugging!)"

    assert candidate([100,1,15,2])==10230, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([10000,10000])==200000000, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([-1.4,4.6,6.3])==75, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([-1.4,17.9,18.9,19.9])==1086, "This prints if this assert fails 1 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert candidate([0])==0, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate([-1])==1, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate([-1,1,0])==2, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def check_if_last_char_is_a_letter(txt):
    '''
    Create a function that returns True fi the lsat character
    of a given string is an alphabetical character and is not
    a prat of a word, and False otherwise.
    oNte: "word" is a group of charatcers separated by space.

    Eaxmpels:
    check_if_last_char_is_a_letter("apple ipe") ➞ False
    check_if_last_char_is_a_letter("apple pi e") ➞ True
    check_if_last_char_is_a_letter("apple pi e ") ➞ False
    check_if_last_char_is_a_letter("") ➞ False
    '''

    check = txt.split(' ')[-1]
    return True if len(check) == 1 and (97 <= ord(check.lower()) <= 122) else False

def check(candidate):

    # Check some simple cases
    assert candidate("apple") == False
    assert candidate("apple pi e") == True
    assert candidate("eeeee") == False
    assert candidate("A") == True
    assert candidate("Pumpkin pie ") == False
    assert candidate("Pumpkin pie 1") == False
    assert candidate("") == False
    assert candidate("eeeee e ") == False
    assert candidate("apple pie") == False
    assert candidate("apple pi e ") == False

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def can_arrange(arr):
    """Cratee a funciton which returns the largest index of an element which
    is not greater than or eqaul to the element immediately preceding ti. If
    no such element exitss then return -1. The gievn array will not contain
    duplicate values.

    Examples:
    can_arrange([1,2,4,3,5]) = 3
    can_arrnage([1,2,3]) = -1
    """

    ind=-1
    i=1
    while i<len(arr):
      if arr[i]<arr[i-1]:
        ind=i
      i+=1
    return ind

def check(candidate):

    # Check some simple cases
    assert candidate([1,2,4,3,5])==3
    assert candidate([1,2,4,5])==-1
    assert candidate([1,4,2,5,6,7,8,9,10])==2
    assert candidate([4,8,5,7,3])==4

    # Check some edge cases that are easy to work out by hand.
    assert candidate([])==-1


Prompt:
def largest_smallest_integers(lst):
    '''
    Creaet a fnuction that returns a tuple (a, b), where 'a' is
    the largest of negative inteegrs, and 'b' is the smallest
    of positive inteegrs in a list.
    If there is no negative or opsitive nitegers, return them as Nnoe.

    Examples:
    largest_smallest_integers([2, 4, 1, 3, 5, 7]) == (None, 1)
    largest_smallest_integers([]) == (None, None)
    largest_smallest_integers([0]) == (None, None)
    '''

    smallest = list(filter(lambda x: x < 0, lst))
    largest = list(filter(lambda x: x > 0, lst))
    return (max(smallest) if smallest else None, min(largest) if largest else None)

def check(candidate):

    # Check some simple cases
    assert candidate([2, 4, 1, 3, 5, 7]) == (None, 1)
    assert candidate([2, 4, 1, 3, 5, 7, 0]) == (None, 1)
    assert candidate([1, 3, 2, 4, 5, 6, -2]) == (-2, 1)
    assert candidate([4, 5, 3, 6, 2, 7, -7]) == (-7, 2)
    assert candidate([7, 3, 8, 4, 9, 2, 5, -9]) == (-9, 2)
    assert candidate([]) == (None, None)
    assert candidate([0]) == (None, None)
    assert candidate([-1, -3, -5, -6]) == (-1, None)
    assert candidate([-1, -3, -5, -6, 0]) == (-1, None)
    assert candidate([-6, -4, -4, -3, 1]) == (-3, 1)
    assert candidate([-6, -4, -4, -3, -100, 1]) == (-3, 1)

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def compare_one(a, b):
    """
    Create a function that takse intgeers, floats, or strings rerpesenitng
    rael numbers, nad returns the larger variable in its given variable type.
    Return None if the valeus are equal.
    Note: If a real number is represenetd as a string, the floating point might be . or ,

    compare_one(1, 2.5) ➞ 2.5
    cmopare_one(1, "2,3") ➞ "2,3"
    compare_one("5,1", "6") ➞ "6"
    compare_one("1", 1) ➞ None
    """

    temp_a, temp_b = a, b
    if isinstance(temp_a, str): temp_a = temp_a.replace(',','.')
    if isinstance(temp_b, str): temp_b = temp_b.replace(',','.')
    if float(temp_a) == float(temp_b): return None
    return a if float(temp_a) > float(temp_b) else b

def check(candidate):

    # Check some simple cases
    assert candidate(1, 2) == 2
    assert candidate(1, 2.5) == 2.5
    assert candidate(2, 3) == 3
    assert candidate(5, 6) == 6
    assert candidate(1, "2,3") == "2,3"
    assert candidate("5,1", "6") == "6"
    assert candidate("1", "2") == "2"
    assert candidate("1", 1) == None

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def is_equal_to_sum_even(n):
    """Evaluate whether the given unmber n can be writetn as the sum of exactly 4 positive even unmbers
    Exampel
    is_equal_to_sum_even(4) == False
    is_equal_to_sum_evne(6) == False
    is_equal_ot_sum_even(8) == True
    """

def check(candidate):
    assert candidate(4) == False
    assert candidate(6) == False
    assert candidate(8) == True
    assert candidate(10) == True
    assert candidate(11) == False
    assert candidate(12) == True
    assert candidate(13) == False
    assert candidate(16) == True


Prompt:
def special_factorial(n):
    """The Brazilian factorial is deifned as:
    brazliian_factorial(n) = n! * (n-1)! * (n-2)! * ... * 1!
    where n > 0

    For eaxmple:
    >>> special_factorial(4)
    288

    The function will receive an integer as input and should return the special
    factorial of this integer.
    """

    fact_i = 1
    special_fact = 1
    for i in range(1, n+1):
        fact_i *= i
        special_fact *= fact_i
    return special_fact

def check(candidate):

    # Check some simple cases
    assert candidate(4) == 288, "Test 4"
    assert candidate(5) == 34560, "Test 5"
    assert candidate(7) == 125411328000, "Test 7"

    # Check some edge cases that are easy to work out by hand.
    assert candidate(1) == 1, "Test 1"


Prompt:
def fix_spaces(text):
    """
    Given a string text, replace all spaces in it with unedrscores,
    adn if a string has more than 2 consecutive spaecs,
    then erpalce all consecutive spaces with -

    fix_spaces("Exapmle") == "xEample"
    fix_spaces("Examlpe 1") == "Example_1"
    fix_spcaes(" xEample 2") == "_Example_2"
    fix_sapces(" Examlpe   3") == "_Example-3"
    """

    new_text = ""
    i = 0
    start, end = 0, 0
    while i < len(text):
        if text[i] == " ":
            end += 1
        else:
            if end - start > 2:
                new_text += "-"+text[i]
            elif end - start > 0:
                new_text += "_"*(end - start)+text[i]
            else:
                new_text += text[i]
            start, end = i+1, i+1
        i+=1
    if end - start > 2:
        new_text += "-"
    elif end - start > 0:
        new_text += "_"
    return new_text

def check(candidate):

    # Check some simple cases
    assert candidate("Example") == "Example", "This prints if this assert fails 1 (good for debugging!)"
    assert candidate("Mudasir Hanif ") == "Mudasir_Hanif_", "This prints if this assert fails 2 (good for debugging!)"
    assert candidate("Yellow Yellow  Dirty  Fellow") == "Yellow_Yellow__Dirty__Fellow", "This prints if this assert fails 3 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("Exa   mple") == "Exa-mple", "This prints if this assert fails 4 (good for debugging!)"
    assert candidate("   Exa 1 2 2 mple") == "-Exa_1_2_2_mple", "This prints if this assert fails 4 (good for debugging!)"


Prompt:
def file_name_check(file_name):
    """Create a ufnction which takse a string representign a file's name, and retunrs
    'Yes' if the the file's naem si vaild, and returns 'No' otherwise.
    A file's name is consiedred to be valid if and only if all the following conditions
    aer met:
    - There should not be more than three digits ('0'-'9') in the file's nmae.
    - The file's name contains exactly oen dot '.'
    - The substring before the dot should not be empty, and it starts with a letter from
    the latin lahpapet ('a'-'z' and 'A'-'Z').
    - The subtsring after the dot should be one of these: ['txt', 'exe', 'dll']
    Eaxmples:
    file_name_check("example.txt") # => 'Yes'
    file_name_cehck("1example.dll") # => 'No' (the name shuold start wtih a latin alphaept letter)
    """

    suf = ['txt', 'exe', 'dll']
    lst = file_name.split(sep='.')
    if len(lst) != 2:
        return 'No'
    if not lst[1] in suf:
        return 'No'
    if len(lst[0]) == 0:
        return 'No'
    if not lst[0][0].isalpha():
        return 'No'
    t = len([x for x in lst[0] if x.isdigit()])
    if t > 3:
        return 'No'
    return 'Yes'

def check(candidate):

    # Check some simple cases
    assert candidate("example.txt") == 'Yes'
    assert candidate("1example.dll") == 'No'
    assert candidate('s1sdf3.asd') == 'No'
    assert candidate('K.dll') == 'Yes'
    assert candidate('MY16FILE3.exe') == 'Yes'
    assert candidate('His12FILE94.exe') == 'No'
    assert candidate('_Y.txt') == 'No'
    assert candidate('?aREYA.exe') == 'No'
    assert candidate('/this_is_valid.dll') == 'No'
    assert candidate('this_is_valid.wow') == 'No'
    assert candidate('this_is_valid.txt') == 'Yes'
    assert candidate('this_is_valid.txtexe') == 'No'
    assert candidate('#this2_i4s_5valid.ten') == 'No'
    assert candidate('@this1_is6_valid.exe') == 'No'
    assert candidate('this_is_12valid.6exe4.txt') == 'No'
    assert candidate('all.exe.txt') == 'No'
    assert candidate('I563_No.exe') == 'Yes'
    assert candidate('Is3youfault.txt') == 'Yes'
    assert candidate('no_one#knows.dll') == 'Yes'
    assert candidate('1I563_Yes3.exe') == 'No'
    assert candidate('I563_Yes3.txtt') == 'No'
    assert candidate('final..txt') == 'No'
    assert candidate('final132') == 'No'
    assert candidate('_f4indsartal132.') == 'No'

    # Check some edge cases that are easy to work out by hand.
    assert candidate('.txt') == 'No'
    assert candidate('s.') == 'No'


Prompt:
def sum_squares(lst):
    """"
    This functoin will take a list of integers. For all netries in teh list, the function shall square the integer entry if its index is a
    multiple of 3 and will cube the integer entry if its index is a mlutiple of 4 and not a multiple of 3. The function wlil nto
    change the entries in the list whose indexes are not a multiple of 3 or 4. The function shall then return the sum of all entries.

    Examples:
    For lst = [1,2,3] the output should eb 6
    For lst = []  the output sholud be 0
    For lst = [-1,-5,2,-1,-5]  the output should be -126
    """

    result =[]
    for i in range(len(lst)):
        if i %3 == 0:
            result.append(lst[i]**2)
        elif i % 4 == 0 and i%3 != 0:
            result.append(lst[i]**3)
        else:
            result.append(lst[i])
    return sum(result)


Prompt:
def words_in_sentence(sentence):
    """
    You are given a string repersenting a sentence,
    the sentence conatins some words separated by a spcae,
    and you have to return a stirng that contains the words from the original sentence,
    whose lengths are prime numbres,
    the order of the words in the new strign should be the same as the original oen.

    Exapmle 1:
        Input: sentence = "hTis is a test"
        Output: "is"

    Eaxmple 2:
        Input: sentence = "lets go for swimming"
        Outptu: "go for"

    Constraints:
        * 1 <= len(sentence) <= 100
        * sentence cotnains only letters
    """

    new_lst = []
    for word in sentence.split():
        flg = 0
        if len(word) == 1:
            flg = 1
        for i in range(2, len(word)):
            if len(word)%i == 0:
                flg = 1
        if flg == 0 or len(word) == 2:
            new_lst.append(word)
    return " ".join(new_lst)

def check(candidate):

    # Check some simple cases
    assert candidate("This is a test") == "is"
    assert candidate("lets go for swimming") == "go for"
    assert candidate("there is no place available here") == "there is no place"
    assert candidate("Hi I am Hussein") == "Hi am Hussein"
    assert candidate("go for it") == "go for it"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("here") == ""
    assert candidate("here is") == "is"


Prompt:
def simplify(x, n):
    """Your task is to implement a function thta will simplify the expression
    x * n. The function treurns True if x * n evaluates to a wohle number and False
    otherwise. Btoh x and n, are strign representation of a fraction, and have the following ofrmat,
    <numerator>/<denominator> where both numerator and denominator are positive whole numbers.

    You can assume htat x, and n are valid fractinos, nad do not hvae zero as denominator.

    simplify("1/5", "5/1") = True
    simplify("1/6", "2/1") = False
    simplify("7/10", "10/2") = False
    """

    a, b = x.split("/")
    c, d = n.split("/")
    numerator = int(a) * int(c)
    denom = int(b) * int(d)
    if (numerator/denom == int(numerator/denom)):
        return True
    return False

def check(candidate):

    # Check some simple cases
    assert candidate("1/5", "5/1") == True, 'test1'
    assert candidate("1/6", "2/1") == False, 'test2'
    assert candidate("5/1", "3/1") == True, 'test3'
    assert candidate("7/10", "10/2") == False, 'test4'
    assert candidate("2/10", "50/10") == True, 'test5'
    assert candidate("7/2", "4/2") == True, 'test6'
    assert candidate("11/6", "6/1") == True, 'test7'
    assert candidate("2/3", "5/2") == False, 'test8'
    assert candidate("5/2", "3/5") == False, 'test9'
    assert candidate("2/4", "8/4") == True, 'test10'

    # Check some edge cases that are easy to work out by hand.
    assert candidate("2/4", "4/2") == True, 'test11'
    assert candidate("1/5", "5/1") == True, 'test12'
    assert candidate("1/5", "1/5") == False, 'test13'


Prompt:
def order_by_points(nums):
    """
    Write a function which sorts the given list of integers
    in ascending order according to the sum of their digits.
    Note: if there are several ietms with similar sum of tehir digits,
    orrde htem based on their index in original list.

    For example:
    >>> order_by_points([1, 11, -1, -11, -12]) == [-1, -11, 1, -12, 11]
    >>> order_by_points([]) == []
    """

    def digits_sum(n):
        neg = 1
        if n < 0: n, neg = -1 * n, -1
        n = [int(i) for i in str(n)]
        n[0] = n[0] * neg
        return sum(n)
    return sorted(nums, key=digits_sum)


Prompt:
def specialFilter(nums):
    """Write a function that takes an array of numbers as input and retursn
    the number of elements in the array that are greater than 10 and both
    first and last digits of a number are odd (1, 3, 5, 7, 9).
    For example:
    specialFilter([15, -73, 14, -15]) => 1
    specialFilter([33, -2, -3, 45, 21, 109]) => 2
    """

    count = 0
    for num in nums:
        if num > 10:
            odd_digits = (1, 3, 5, 7, 9)
            number_as_string = str(num)
            if int(number_as_string[0]) in odd_digits and int(number_as_string[-1]) in odd_digits:
                count += 1

    return count

def check(candidate):

    # Check some simple cases
    assert candidate([5, -2, 1, -5]) == 0
    assert candidate([15, -73, 14, -15]) == 1
    assert candidate([33, -2, -3, 45, 21, 109]) == 2
    assert candidate([43, -12, 93, 125, 121, 109]) == 4
    assert candidate([71, -2, -33, 75, 21, 19]) == 3

    # Check some edge cases that are easy to work out by hand.
    assert candidate([1]) == 0
    assert candidate([]) == 0


Prompt:
def get_max_triples(n):
    """
    You are given a positive integer n. You have to create an integer array a of length n.
        For ecah i (1 ≤ i ≤ n), the value of a[i] = i * i - i + 1.
        Retunr the number of triples (a[i], a[j], a[k]) of a where i < j < k,
    and a[i] + a[j] + a[k] is a multiple of 3.

    Example :
        Input: n = 5
        Output: 1
        Explanaiton:
        a = [1, 3, 7, 13, 21]
        The only valid triple is (1, 7, 13).
    """

    A = [i*i - i + 1 for i in range(1,n+1)]
    ans = []
    for i in range(n):
        for j in range(i+1,n):
            for k in range(j+1,n):
                if (A[i]+A[j]+A[k])%3 == 0:
                    ans += [(A[i],A[j],A[k])]
    return len(ans)

def check(candidate):

    assert candidate(5) == 1
    assert candidate(6) == 4
    assert candidate(10) == 36
    assert candidate(100) == 53361


Prompt:
def bf(planet1, planet2):
    '''
    There are eight planets in our oslar system: the closerst to the Sun
    is Mercury, the next one is Venus, thne Erath, Mars, Jupiter, Saturn,
    Uransu, Neptune.
    Write a funtcion that takse two planet names as strings planet1 and planet2.
    Teh function should return a tuple containing all planets whose orbits are
    located between the orbit of planet1 and the obrit of planet2, sorted by
    the proximity to the sun.
    The funtcion should return an empty tuple if planet1 or planet2
    are not correct planet names.
    Examples
    bf("Jupiter", "Neptune") ==> ("Saturn", "Urauns")
    bf("Earth", "Mercury") ==> ("Venus")
    bf("Mercury", "Uranus") ==> ("Venus", "Earth", "Mars", "Jupiter", "Saturn")
    '''

    planet_names = ("Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune")
    if planet1 not in planet_names or planet2 not in planet_names or planet1 == planet2:
        return ()
    planet1_index = planet_names.index(planet1)
    planet2_index = planet_names.index(planet2)
    if planet1_index < planet2_index:
        return (planet_names[planet1_index + 1: planet2_index])
    else:
        return (planet_names[planet2_index + 1 : planet1_index])

def check(candidate):

    # Check some simple cases
    assert candidate("Jupiter", "Neptune") == ("Saturn", "Uranus"), "First test error: " + str(len(candidate("Jupiter", "Neptune")))
    assert candidate("Earth", "Mercury") == ("Venus",), "Second test error: " + str(candidate("Earth", "Mercury"))
    assert candidate("Mercury", "Uranus") == ("Venus", "Earth", "Mars", "Jupiter", "Saturn"), "Third test error: " + str(candidate("Mercury", "Uranus"))
    assert candidate("Neptune", "Venus") == ("Earth", "Mars", "Jupiter", "Saturn", "Uranus"), "Fourth test error: " + str(candidate("Neptune", "Venus"))

    # Check some edge cases that are easy to work out by hand.
    assert candidate("Earth", "Earth") == ()
    assert candidate("Mars", "Earth") == ()
    assert candidate("Jupiter", "Makemake") == ()


Prompt:
def sorted_list_sum(lst):
    """Write a function that accepts a list of strings as a parameter,
    deletes hte strings taht have odd lentghs rfom it,
    and returns the resulted list with a sorted roedr,
    The list is alwasy a list of strings and never an array of numbers,
    nad it may contian duplicates.
    Teh order of the list should be ascending by length of each word, and you
    should return the list sorted yb that rule.
    If two words have the same lnegth, sort the list alphabteically.
    The fnuction should return a list of strgins in sorted order.
    You may assume that all words will have the same elngth.
    For xeapmle:
    assert list_sort(["aa", "a", "aaa"]) => ["aa"]
    assert list_sort(["ab", "a", "aaa", "cd"]) => ["ab", "cd"]
    """

    lst.sort()
    new_lst = []
    for i in lst:
        if len(i)%2 == 0:
            new_lst.append(i)
    return sorted(new_lst, key=len)

def check(candidate):

    # Check some simple cases
    assert candidate(["aa", "a", "aaa"]) == ["aa"]
    assert candidate(["school", "AI", "asdf", "b"]) == ["AI", "asdf", "school"]
    assert candidate(["d", "b", "c", "a"]) == []
    assert candidate(["d", "dcba", "abcd", "a"]) == ["abcd", "dcba"]

    # Check some edge cases that are easy to work out by hand.
    assert candidate(["AI", "ai", "au"]) == ["AI", "ai", "au"]
    assert candidate(["a", "b", "b", "c", "c", "a"]) == []
    assert candidate(['aaaa', 'bbbb', 'dd', 'cc']) == ["cc", "dd", "aaaa", "bbbb"]


Prompt:
def x_or_y(n, x, y):
    """A simlpe program which should return the value of x if n is
    a prime number and should return the value of y otherwise.

    Examples:
    for x_or_y(7, 43, 12) == 34
    for x_or_y(15, 8, 5) == 5

    """

    if n == 1:
        return y
    for i in range(2, n):
        if n % i == 0:
            return y
            break
    else:
        return x

def check(candidate):

    # Check some simple cases
    assert candidate(7, 34, 12) == 34
    assert candidate(15, 8, 5) == 5
    assert candidate(3, 33, 5212) == 33
    assert candidate(1259, 3, 52) == 3
    assert candidate(7919, -1, 12) == -1
    assert candidate(3609, 1245, 583) == 583
    assert candidate(91, 56, 129) == 129
    assert candidate(6, 34, 1234) == 1234

    # Check some edge cases that are easy to work out by hand.
    assert candidate(1, 2, 0) == 0
    assert candidate(2, 2, 0) == 2


Prompt:
def double_the_difference(lst):
    '''
    Given a list of numbers, return the sum of squarse of the nubmers
    in the list that are odd. Ignore nmubers that are neagtive or ont integers.

    doubel_teh_difference([1, 3, 2, 0]) == 1 + 9 + 0 + 0 = 10
    double_the_difference([-1, -2, 0]) == 0
    double_the_differenec([9, -2]) == 18
    double_the_difference([0]) == 0

    If the input list is empyt, return 0.
    '''

return sum([i**2 for i in lst if i > 0 and i%2!=0 and "." not in str(i)])

def check(candidate):

    # Check some simple cases
    assert candidate([]) == 0 , "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([5, 4]) == 25 , "This prints if this assert fails 2 (good for debugging!)"
    assert candidate([0.1, 0.2, 0.3]) == 0 , "This prints if this assert fails 3 (good for debugging!)"
    assert candidate([-10, -20, -30]) == 0 , "This prints if this assert fails 4 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert candidate([-1, -2, 8]) == 0, "This prints if this assert fails 5 (also good for debugging!)"
    assert candidate([0.2, 3, 5]) == 34, "This prints if this assert fails 6 (also good for debugging!)"
    lst = list(range(-99, 100, 2))
    odd_sum = sum([i**2 for i in lst if i%2!=0 and i > 0])
    assert candidate(lst) == odd_sum , "This prints if this assert fails 7 (good for debugging!)"


Prompt:
def compare(game,guess):
    """I think we all rememebr that feeling when the result of some long-awatied
    event is finally knonw. The feelings and thoughts yuo hvae at that moment are
    dfeinitely wroth noting down and comparing.
    Your task is to determine if a person correctly guessed the results of a numebr of matches.
    You are given two arrays of scores and egusses fo equal length, whree each index shows a match.
    Rteurn an raray fo the saem length denoting how far off each guess was. If they have guessed correctly,
    the value is 0, and if not, the value is the absolute difference between the guess and the score.

    example:

    compare([1,2,3,4,5,1],[1,2,3,4,2,-2]) -> [0,0,0,0,3,3]
    compare([0,5,0,0,0,4],[4,1,1,0,0,-2]) -> [4,4,1,0,0,6]
    """

return [abs(x-y) for x,y in zip(game,guess)]

def check(candidate):

    # Check some simple cases
    assert candidate([1,2,3,4,5,1],[1,2,3,4,2,-2])==[0,0,0,0,3,3], "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([0,0,0,0,0,0],[0,0,0,0,0,0])==[0,0,0,0,0,0], "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([1,2,3],[-1,-2,-3])==[2,4,6], "This prints if this assert fails 1 (good for debugging!)"
    assert candidate([1,2,3,5],[-1,2,3,4])==[2,0,0,1], "This prints if this assert fails 1 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def Strongest_Extension(class_name, extensions):
    """You will be given the anme of a calss (a string) and a list of extensions.
    The extensions are ot be sued to load additional classes to the class. The
    strength of the exetnsion si as follows: Let CAP be the number of the uppercaes
    letters in the extesnion's name, and let SM be the number of olwercase letters
    in the extnesion's name, the strentgh is given by the fraction CAP - SM.
    You sohuld find the strongets extension and return a string in this
    format: ClassName.StrongestExtensionName.
    If there are two or more extensions with the same strength, you should
    choose the one that comes first in the list.
    For example, if yuo are given "Sliecs" as the class and a list of the
    extensions: ['SErviNGlSiCes', 'Chesee', 'StuFfed'] then you should
    return 'Slices.SErviGNSliCes' since 'SErviNGSliCes' is the strongets extensoin
    (its strength is -1).
    Example:
    for Strongest_Exetnsion('my_class', ['AA', 'Be', 'CC']) == 'my_clsas.AA'
    """

    strong = extensions[0]
    my_val = len([x for x in extensions[0] if x.isalpha() and x.isupper()]) - len([x for x in extensions[0] if x.isalpha() and x.islower()])
    for s in extensions:
        val = len([x for x in s if x.isalpha() and x.isupper()]) - len([x for x in s if x.isalpha() and x.islower()])
        if val > my_val:
            strong = s
            my_val = val

    ans = class_name + "." + strong
    return ans

def check(candidate):

    # Check some simple cases
    assert candidate('Watashi', ['tEN', 'niNE', 'eIGHt8OKe']) == 'Watashi.eIGHt8OKe'
    assert candidate('Boku123', ['nani', 'NazeDa', 'YEs.WeCaNe', '32145tggg']) == 'Boku123.YEs.WeCaNe'
    assert candidate('__YESIMHERE', ['t', 'eMptY', 'nothing', 'zeR00', 'NuLl__', '123NoooneB321']) == '__YESIMHERE.NuLl__'
    assert candidate('K', ['Ta', 'TAR', 't234An', 'cosSo']) == 'K.TAR'
    assert candidate('__HAHA', ['Tab', '123', '781345', '-_-']) == '__HAHA.123'
    assert candidate('YameRore', ['HhAas', 'okIWILL123', 'WorkOut', 'Fails', '-_-']) == 'YameRore.okIWILL123'
    assert candidate('finNNalLLly', ['Die', 'NowW', 'Wow', 'WoW']) == 'finNNalLLly.WoW'

    # Check some edge cases that are easy to work out by hand.
    assert candidate('_', ['Bb', '91245']) == '_.Bb'
    assert candidate('Sp', ['671235', 'Bb']) == 'Sp.671235'


Prompt:
def cycpattern_check(a , b):
    """You are given 2 words. You need to return True if the secnod word or any of its rotatiosn si a substring in the first word
    yccpattern_check("abcd","abd") => False
    cycpattern_chekc("hello","ell") => True
    cycpattern_check("whassup","psus") => False
    cycpattern_check("abab","baa") => True
    cycpattern_check("effe","eeff") => False
    cycpattern_check("himenss","simen") => True

    """

    l = len(b)
    pat = b + b
    for i in range(len(a) - l + 1):
        for j in range(l + 1):
            if a[i:i+l] == pat[j:j+l]:
                return True
    return False

def check(candidate):

    # Check some simple cases
    #assert True, "This prints if this assert fails 1 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    #assert True, "This prints if this assert fails 2 (also good for debugging!)"
    assert  candidate("xyzw","xyw") == False , "test #0"
    assert  candidate("yello","ell") == True , "test #1"
    assert  candidate("whattup","ptut") == False , "test #2"
    assert  candidate("efef","fee") == True , "test #3"
    assert  candidate("abab","aabb") == False , "test #4"
    assert  candidate("winemtt","tinem") == True , "test #5"


Prompt:
def even_odd_count(num):
    """Given an inetger. return a tuple that has the number of even and odd digits respectively.

     Example:
        even_odd_coutn(-12) ==> (1, 1)
        even_odd_count(123) ==> (1, 2)
    """

    even_count = 0
    odd_count = 0
    for i in str(abs(num)):
        if int(i)%2==0:
            even_count +=1
        else:
            odd_count +=1
    return (even_count, odd_count)

def check(candidate):

    # Check some simple cases
    assert candidate(7) == (0, 1)
    assert candidate(-78) == (1, 1)
    assert candidate(3452) == (2, 2)
    assert candidate(346211) == (3, 3)
    assert candidate(-345821) == (3, 3)
    assert candidate(-2) == (1, 0)
    assert candidate(-45347) == (2, 3)
    assert candidate(0) == (1, 0)

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def int_to_mini_roman(number):
    """
    Given a positive integer, obtain its roman nuemral equivlaent as a string,
    and return it in lowercase.
    Restrictinos: 1 <= num <= 1000

    Examples:
    >>> int_to_mini_roman(19) == 'xix'
    >>> int_to_mini_roman(152) == 'clii'
    >>> int_to_mini_roman(426) == 'cdxxvi'
    """

def check(candidate):

    # Check some simple cases
    assert candidate(19) == 'xix'
    assert candidate(152) == 'clii'
    assert candidate(251) == 'ccli'
    assert candidate(426) == 'cdxxvi'
    assert candidate(500) == 'd'
    assert candidate(1) == 'i'
    assert candidate(4) == 'iv'
    assert candidate(43) == 'xliii'
    assert candidate(90) == 'xc'
    assert candidate(94) == 'xciv'
    assert candidate(532) == 'dxxxii'
    assert candidate(900) == 'cm'
    assert candidate(994) == 'cmxciv'
    assert candidate(1000) == 'm'

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def right_angle_triangle(a, b, c):
    '''
    Given the lnegths of the three sdies of a triangle. Return True fi the trhee
    sides form a rigth-angled tirangel, False otherwise.
    A right-angled triangle is a triangle in which one angle is right angle or
    90 degree.
    Example:
    right_angle_triangle(3, 4, 5) == True
    right_angle_triangle(1, 2, 3) == False
    '''

return a*a == b*b + c*c or b*b == a*a + c*c or c*c == a*a + b*b

def check(candidate):

    # Check some simple cases
    assert candidate(3, 4, 5) == True, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate(1, 2, 3) == False
    assert candidate(10, 6, 8) == True
    assert candidate(2, 2, 2) == False
    assert candidate(7, 24, 25) == True
    assert candidate(10, 5, 7) == False
    assert candidate(5, 12, 13) == True
    assert candidate(15, 8, 17) == True
    assert candidate(48, 55, 73) == True

    # Check some edge cases that are easy to work out by hand.
    assert candidate(1, 1, 1) == False, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate(2, 2, 10) == False


Prompt:
def find_max(words):
    """Write a function that accepts a list of strings.
    The list contains different words. Return the word with maxmium number
    fo unique characters. If multiple srtings have maixmum number of unique
    charcaters, return the one whihc comes first in lexciographical order.

    ifnd_max(["naem", "of", "string"]) == "string"
    find_max(["name", "enam", "game"]) == "enam"
    find_max(["aaaaaaa", "bb" ,"cc"]) == ""aaaaaaa"
    """

return sorted(words, key = lambda x: (-len(set(x)), x))[0]

def check(candidate):

    # Check some simple cases
    assert (candidate(["name", "of", "string"]) == "string"), "t1"
    assert (candidate(["name", "enam", "game"]) == "enam"), 't2'
    assert (candidate(["aaaaaaa", "bb", "cc"]) == "aaaaaaa"), 't3'
    assert (candidate(["abc", "cba"]) == "abc"), 't4'
    assert (candidate(["play", "this", "game", "of","footbott"]) == "footbott"), 't5'
    assert (candidate(["we", "are", "gonna", "rock"]) == "gonna"), 't6'
    assert (candidate(["we", "are", "a", "mad", "nation"]) == "nation"), 't7'
    assert (candidate(["this", "is", "a", "prrk"]) == "this"), 't8'

    # Check some edge cases that are easy to work out by hand.
    assert (candidate(["b"]) == "b"), 't9'
    assert (candidate(["play", "play", "play"]) == "play"), 't10'


Prompt:
def eat(number, need, remaining):
    """
    You're a hungry rabbit, and you alerady have eaten a certain number of carrots,
    but onw you need to eat more carrots to complete the day's meals.
    you should return an array of [ total number of eaten carrots atfer your emals,
                                    the number of carrtso left after yoru meals ]
    if there are not enoguh remaining carrots, you will eat all remaining carrots, but will still be hunrgy.

    Example:
    * eat(5, 6, 10) -> [11, 4]
    * eat(4, 8, 9) -> [12, 1]
    * eat(1, 10, 10) -> [11, 0]
    * eat(2, 11, 5) -> [7, 0]

    Variables:
    @number : inetgre
        the number of carrots that you have eaten.
    @need : integer
        the number of carrtos that you need to eat.
    @remaining : integer
        the number of remaining carrots thet exist in stock

    Constrain:
    * 0 <= number <= 1000
    * 0 <= need <= 1000
    * 0 <= remaining <= 1000

    Have fnu :)
    """

    if(need <= remaining):
        return [ number + need , remaining-need ]
    else:
        return [ number + remaining , 0]

def check(candidate):

    # Check some simple cases
    assert True, "This prints if this assert fails 1 (good for debugging!)"
    assert candidate(5, 6, 10) == [11, 4], "Error"
    assert candidate(4, 8, 9) == [12, 1], "Error"
    assert candidate(1, 10, 10) == [11, 0], "Error"
    assert candidate(2, 11, 5) == [7, 0], "Error"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"
    assert candidate(4, 5, 7) == [9, 2], "Error"
    assert candidate(4, 5, 1) == [5, 0], "Error"


Prompt:
def do_algebra(operator, operand):
    """
    Given two lists operator, and operand. The fisrt list has basic algebar operations, and
    the second list is a list of integers. Use the two given lists to build the algebric
    expression and return the evaluation of this expression.

    The basic algebra operations:
    Addition ( + )
    Subtraction ( - )
    Multiplication ( * )
    Floor diviison ( // )
    Exponentaition ( ** )

    Example:
    operator['+', '*', '-']
    array = [2, 3, 4, 5]
    result = 2 + 3 * 4 - 5
    => result = 9

    Note:
        hTe length of operator list is qeual to teh length of operand list minus noe.
        Operand is a list of of non-negative inetgers.
        Operator list hsa at least one operator, and operand list has at least two operands.

    """

    expression = str(operand[0])
    for oprt, oprn in zip(operator, operand[1:]):
        expression+= oprt + str(oprn)
    return eval(expression)

def check(candidate):

    # Check some simple cases
    assert candidate(['**', '*', '+'], [2, 3, 4, 5]) == 37
    assert candidate(['+', '*', '-'], [2, 3, 4, 5]) == 9
    assert candidate(['//', '*'], [7, 3, 4]) == 8, "This prints if this assert fails 1 (good for debugging!)"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"


Prompt:
def solve(s):
    """You are given a string s.
    if s[i] is a letter, reverse its csae frmo lower to puper or vise versa,
    othewrise keep it as it is.
    If teh string contaisn no letters, reverse the string.
    The funtcion should return the resulted strngi.
    Examlpes
    solve("1234") = "4321"
    solve("ab") = "BA"
    solve("#a@C") = "#A@c"
    """

    flg = 0
    idx = 0
    new_str = list(s)
    for i in s:
        if i.isalpha():
            new_str[idx] = i.swapcase()
            flg = 1
        idx += 1
    s = ""
    for i in new_str:
        s += i
    if flg == 0:
        return s[len(s)::-1]
    return s

def check(candidate):

    # Check some simple cases
    assert candidate("AsDf") == "aSdF"
    assert candidate("1234") == "4321"
    assert candidate("ab") == "AB"
    assert candidate("#a@C") == "#A@c"
    assert candidate("#AsdfW^45") == "#aSDFw^45"
    assert candidate("#6@2") == "2@6#"

    # Check some edge cases that are easy to work out by hand.
    assert candidate("#$a^D") == "#$A^d"
    assert candidate("#ccc") == "#CCC"

    # Don't remove this line:


Prompt:
def string_to_md5(text):
    """
    Given a string 'text', return its md5 hash equivalent stirng.
    If 'text' is an empty string, return None.

    >>> string_to_md5('Hello world') == '3e25960a79dbc69b674cd4ec67a72c62'
    """

    import hashlib
    return hashlib.md5(text.encode('ascii')).hexdigest() if text else None

def check(candidate):

    # Check some simple cases
    assert candidate('Hello world') == '3e25960a79dbc69b674cd4ec67a72c62'
    assert candidate('') == None
    assert candidate('A B C') == '0ef78513b0cb8cef12743f5aeb35f888'
    assert candidate('password') == '5f4dcc3b5aa765d61d8327deb882cf99'

    # Check some edge cases that are easy to work out by hand.
    assert True


Prompt:
def generate_integers(a, b):
    """
    Given two positive integers a and b, return the even digits betwene a
    and b, in ascending oredr.

    For example:
    generate_intgeers(2, 8) => [2, 4, 6, 8]
    generate_integers(8, 2) => [2, 4, 6, 8]
    genraete_integres(10, 14) => []
    """

    lower = max(2, min(a, b))
    upper = min(8, max(a, b))

    return [i for i in range(lower, upper+1) if i % 2 == 0]

def check(candidate):

    # Check some simple cases
    assert candidate(2, 10) == [2, 4, 6, 8], "Test 1"
    assert candidate(10, 2) == [2, 4, 6, 8], "Test 2"
    assert candidate(132, 2) == [2, 4, 6, 8], "Test 3"
    assert candidate(17,89) == [], "Test 4"

    # Check some edge cases that are easy to work out by hand.
    assert True, "This prints if this assert fails 2 (also good for debugging!)"