[leetcode]Linked List Cycle II @ Python
原題地址：http://oj.leetcode.com/problems/linked-list-cycle-ii/ 題意：如果鏈表中存在環路，找到環路的起點節點。 解題思路：這道題有點意思。首先使用快慢指針技巧，如果fast指針和slow指針相遇，則說明鏈表存在環路。具體技巧參見上一篇 ...
原文：[leetcode]Linked List Cycle @ Python
原題地址：http: oj.leetcode.com problems linked list cycle 題意：判斷鏈表中是否存在環路。 解題思路：快慢指針技巧，slow指針和fast指針開始同時指向頭結點head，fast每次走兩步，slow每次走一步。如果鏈表不存在環，那么fast或者fast.next會先到None。如果鏈表中存在環路，則由於fast指針移動的速度是slow指針移動速度的兩 ...
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