[Python] 4.4. PermCheck

https://app.codility.com/programmers/lessons/4-counting_elements/

4. Counting Elements lesson - Learn to Code - Codility

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Task Score 100%

Correctness 100%

Performance 100%

시간복잡도 O(N) or O(N * log(N))

def solution(A):

    _A = sorted(A)
    _B = range(1,len(A)+1)

    answer = 1

    for i in range(len(A)):
        if _B[i] == _A[i]:
            pass
        else:
            answer = 0
            return answer

    return answer