[LeetCode] 457. Circular Array Loop 環形數組循環
You are given a circular array nums of positive and negative integers. If a number k at an index is positive, then move forward k steps. ...
原文：leetcode 457. Circular Array Loop
先回顧一下鏈表的類似問題 leetcode 判定鏈表是否有環 慢指針slowPtr每次后移 個結點。快指針fastPtr每次后移 個結點 LeetCode 找出環的入口點 起點 當fast按照每次 步，slow每次一步的方式走，發現fastPtr和slowPtr重合，確定了單向鏈表有環路。接下來，讓slowPrt回到鏈表的頭部，然后slowPtr和fastPtr各自從自己的位置 fastPtr從兩 ...
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