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[LeetCode] Linked List CycleII
Given a linked list, return the node where the cycle begins. If there is no cycle, return null.Follow up:Can you solve it without using extra space?原创 2014-07-09 11:36:05 · 608 阅读 · 0 评论 -
[LeetCode] Unique Binary Search Trees
Given n, how many structurally unique BST's (binary search trees) that store values 1...n?For example,Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 1原创 2015-01-14 12:57:44 · 487 阅读 · 0 评论