[Algorithm] PermCheck

# you can write to stdout for debugging purposes, e.g.
# print("this is a debug message")

def solution(A):
    # write your code in Python 3.6

    import collections
    def check_duplic(a: list):
        # print(collections.Counter(a).values(), len(collections.Counter(a).values()))
        return False if len(set(collections.Counter(a).values())) == 1 else True
    # print(A)
    if len(A) == max(A) and not check_duplic(A):
        return 1
    else:
        return 0
    pass