array.py

class Array:
    def __init__(self):
        pass

    def CyclicRotation(self, A, K):
        """
        CyclicRotation:
        An array A consisting of N integers is given. Rotation of the array means
        that each element is shifted right by one index, and the last element of
        the array is moved to the first place. For example, the rotation of array
        A = [3, 8, 9, 7, 6] is [6, 3, 8, 9, 7] (elements are shifted right by one
        index and 6 is moved to the first place).
        The goal is to rotate array A K times; that is, each element of A will be
        shifted to the right K times.
        :return:
        """
        if K == len(A) or A == []:
            return A
        else:
            for _ in range(K):
                A.insert(0, A.pop())
            return A

    def OddOccurrencesInArray(self, A):
        """
        A non-empty array A consisting of N integers is given. The array contains
        an odd number of elements, and each element of the array can be paired
        with another element that has the same value, except for one element
        that is left unpaired.
        For example, in array A such that:
          A[0] = 9  A[1] = 3  A[2] = 9
          A[3] = 3  A[4] = 9  A[5] = 7
          A[6] = 9
        the elements at indexes 0 and 2 have value 9,
        the elements at indexes 1 and 3 have value 3,
        the elements at indexes 4 and 6 have value 9,
        the element at index 5 has value 7 and is unpaired.
        :return:
        that, given an array A consisting of N integers fulfilling the above
        conditions, returns the value of the unpaired element.
        """
        s = set(A)
        for i in s:
            print(A)
            if A.count(i) == 1:
                return i
            elif A.count(i) > 1:
                A = list(filter(lambda a: a != i, A))
                continue
        # 100% other's sol
        # s = set()
        # for v in t:
        #     s.add(v) if v not in s else s.remove(v)
        # return list(s)


array = Array()
print(f"CyclicRotation : {array.CyclicRotation([], 5)}")
print(f"OddOccurrencesInArray: {array.OddOccurrencesInArray([9, 3, 9, 3, 9, 7, 9])}")