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例如： 字符串在Python内部的表示是unicode编码，因此，在做编码转换时，通常需要以unicode作为中间编码，即先将其他编码的字符串解码（decode）成unicode，再从unicode编码（encode）成另一种编码。因为从文件读取时，key和都被编码为utf-8，为了查询中文的Key 阅读全文
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Given a strings, cutsinto some substrings such that every substring is a palindrome.Return the minimum cuts needed for a palindrome partitioning ofs.E... 阅读全文
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Givennxmnon-negative integers representing an elevation map 2d where the area of each cell is1x1, compute how much water it is able to trap after rain... 阅读全文
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Givennnon-negative integers representing an elevation map where the width of each bar is1, compute how much water it is able to trap after raining.Exa... 阅读全文
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Given a permutation which contains no repeated number, find its index in all the permutations of these numbers, which are ordered in lexicographical o... 阅读全文
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Given a string s and a dictionary of words dict, determine if s can be break into a space-separated sequence of one or more dictionary words.ExampleGi... 阅读全文
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Given an array with positive and negative integers. Re-range it to interleaving with positive and negative integers.ExampleGiven[-1, -2, -3, 4, 5, 6],... 阅读全文
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Find the number Weak Connected Component in the directed graph. Each node in the graph contains a label and a list of its neighbors. (a connected set ... 阅读全文
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Design an algorithm and write code to serialize and deserialize a binary tree. Writing the tree to a file is called 'serialization' and reading back f... 阅读全文
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Given an integer array, find a continuous rotate subarray where the sum of numbers is the biggest. Your code should return the index of the first numb... 阅读全文