勇敢的心

摘要： Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a linear runtime complex... 阅读全文

摘要： Description:Count the number of prime numbers less than a non-negative number, n.Credits:Special thanks to @mithmatt for adding this problem and creat... 阅读全文

摘要： Write an algorithm to determine if a number is "happy".A happy number is a number defined by the following process: Starting with any positive integer... 阅读全文

摘要： You are playing the following Bulls and Cows game with your friend: You write a 4-digit secret number and ask your friend to guess it. Each time your ... 阅读全文

摘要： Given two strings s and t, determine if they are isomorphic.Two strings are isomorphic if the characters in s can be replaced to get t.All occurrences... 阅读全文

摘要： Given two strings s and t, write a function to determine if t is an anagram of s.For example,s = "anagram", t = "nagaram", return true.s = "rat", t = ... 阅读全文

摘要： Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with... 阅读全文

摘要： Given a pattern and a string str, find if str follows the same pattern.Here follow means a full match, such that there is a bijection between a letter... 阅读全文

摘要： 转载请说明出处：http://blog.csdn.net/cywosp/article/details/32721011 Sublime Text是个跨平台的编辑器，支持Windows、Linux、Mac系统平台，支持各种语言的代码编辑，配合上对应的插件，话上点时间学习，你将会对它 爱不释手，大大的... 阅读全文

摘要： Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 231- 1.For example,123 -> "One Hundred T... 阅读全文