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Given an array of integers, the majority number is the number that occursmore than 1/3 of the size of the array. Find it. Notice There is only one maj 阅读全文
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Given the root and two nodes in a Binary Tree. Find the lowest common ancestor(LCA) of the two nodes. The lowest common ancestor is the node with larg 阅读全文
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Given a string, find the length of the longest substring without repeating characters. Example For example, the longest substring without repeating le 阅读全文
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Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longes 阅读全文
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Given a sequence of integers, find the longest increasing subsequence (LIS). You code should return the length of the LIS. Clarification What's the de 阅读全文