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[LeetCode] Anagrams Given an array of strings, return all groups of strings that are anagrams. Note: All inputs will be in lower-case. 思路: Anagrams指几个 阅读全文
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N-Queens The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, re 阅读全文
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Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array[−2,1,−3,4,−1,2,1 阅读全文
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I: Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the array represents your ma 阅读全文
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Given a collection of intervals, merge all overlapping intervals. For example,Given[1,3],[2,6],[8,10],[15,18],return[1,6],[8,10],[15,18]. 合并有重叠的区间,且原区 阅读全文
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Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary). You may assume that the intervals were initia 阅读全文
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Given a string s consists of upper/lower-case alphabets and empty space characters' ', return the length of last word in the string. If the last word 阅读全文