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摘要： The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x and y, calcul 阅读全文

摘要： 最近需要得到某个文件夹下所有文件名，于是就上网上查了查，得到如下的解决方案最多： 而且查到的最早的版本是这个：http://blog.csdn.net/cxf7394373/article/details/7195661. 但是放到我自己vs里却总是不行，运行到 就崩溃。 原因自己电脑系统为win1 阅读全文

摘要： 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 maximu 阅读全文

摘要： Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell,where "adjacen 阅读全文

摘要： Given a binary tree, return the tilt of the whole tree.The tilt of a tree node is defined as the absolute difference between the sum of all left subtr 阅读全文

摘要： Given an array of 2n integers, your task is to group these integers into n pairs of integer,say (a1, b1), (a2, b2), ..., (an, bn) which makes sum of m 阅读全文

摘要： Given a positive 32-bit integer n, you need to find the smallest 32-bit integer which has exactly the same digits existing inthe integer n and is grea 阅读全文

摘要： There is a brick wall in front of you. The wall is rectangular and has several rows of bricks.The bricks have the same height but different width. You 阅读全文

摘要： Given a string, you need to reverse the order of characters in each word within a sentence whilestill preserving whitespace and initial word order.Exa 阅读全文

摘要： Given an array of integers and an integer k, you need to find the number of unique k-diff pairs in the array. Here a k-diff pair is defined as an inte 阅读全文