codility AbsDistinct

最新推荐文章于 2019-02-17 21:13:27 发布

Later_Fall

最新推荐文章于 2019-02-17 21:13:27 发布

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分类专栏： python codility

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本文介绍了一个用于解决Codility Lesson15中AbsDistinct问题的Python算法。该算法通过双指针技巧，有效地找出给定数组中不同的绝对值数量。文章详细解释了算法的实现逻辑及步骤。

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Question:codility Lesson15 AbsDistinct

My Answer:

def solution(A):
    absdistinct = 1
    head = 0
    tail = len(A) - 1
    cur = max(abs(A[0]),abs(A[-1])) # max abs num 

    while head <= tail:
        former = abs(A[head])
        if former == cur:
            head += 1
            continue

        latter = abs(A[tail])
        if latter == cur:
            tail -= 1
            continue

        if former >= latter:
            cur = former
            head += 1
        else:
            cur = latter
            tail -= 1

        absdistinct += 1

    return absdistinct