摘要： 基于快速排序的TOPK算法转自：http://blog.csdn.net/fanzitao/article/details/7617223思想：类似于快速排序，首先选择一个划分元，如果这个划分元的序号index刚好等于k，那么这个划分元以及左边的数，刚好组成了top-k small data;如果i... 阅读全文

摘要： Number of 1 Bits问题：Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as theHamming weight).For exa... 阅读全文

摘要： Word Search问题：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,... 阅读全文

摘要： Rotate Array问题：Rotate an array ofnelements to the right byksteps.For example, withn= 7 andk= 3, the array[1,2,3,4,5,6,7]is rotated to[5,6,7,1,2,3,4].思... 阅读全文

摘要： Reverse Words in a String问题：Given an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".思路... 阅读全文

摘要： Repeated DNA Sequences问题：All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, i... 阅读全文

摘要： Maximum Product Subarray问题：Find the contiguous subarray within an array (containing at least one number) which has the largest product.For example, gi... 阅读全文

摘要： ZigZag Conversion问题：The string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this patter... 阅读全文

摘要： Reverse Nodes in k-Group问题：Given a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is no... 阅读全文

摘要： Word Break问题：Given a stringsand a dictionary of wordsdict, determine ifscan be segmented into a space-separated sequence of one or more dictionary wor... 阅读全文