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hdu 1116 Play on Words
并查集判断连通,欧拉回路判断是否成链,看网上很多地方都写得很清楚我就不再说什么是欧拉回路了 注意首尾的判断一定要用入度与出度的差等于1来判断,而不能用认为入度为0,出度为1的时首,入度为1,出度为0的是尾。 给一组数据 1 3 aba a ab Ordering is possible. #include #define maxn 27+5 using namespace std...
分类:其他好文   时间:2015-05-08 09:39:54    阅读次数:140
Letter Combinations of a Phone Number——解题报告 (回溯法的应用 )
【题目】        Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below....
分类:其他好文   时间:2015-05-08 09:29:30    阅读次数:121
【leetcode】Combinations
Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.For example,If n = 4 and k = 2, a solution is:[ [2,4], [3,4.....
分类:其他好文   时间:2015-05-08 01:36:44    阅读次数:90
LeetCode-Subsets II
Given a collection of integers that might contain duplicates,nums, return all possible subsets.Note:Elements in a subset must be in non-descending ord...
分类:其他好文   时间:2015-05-07 20:11:21    阅读次数:96
Restore IP Addresses
Title:Given a string containing only digits, restore it by returning all possible valid IP address combinations.For example:Given"25525511135",return[...
分类:其他好文   时间:2015-05-07 16:25:11    阅读次数:92
LeetCode 8 String to Integer (atoi) (C,C++,Java,Python)
Problem: Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the pos...
分类:编程语言   时间:2015-05-07 12:35:08    阅读次数:181
SEO笔记:构建URL的15个SEO最佳实践
By:Rand Fishkin原文链接:https://moz.com/blog/15-seo-best-practices-for-structuring-urls#1: Whenever possible, use a single domain & subdomain1.尽量使用简单的域名/二...
分类:Web程序   时间:2015-05-06 14:55:37    阅读次数:161
NSNull的用法和原理
Represent nil with NSNullIt’s not possible to add nil to the collection classes described in this section because nil in Objective-C means “no object....
分类:其他好文   时间:2015-05-06 14:46:39    阅读次数:111
Permutations
Given a collection of numbers, return all possible permutations.For example,[1,2,3]have the following permutations:[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,...
分类:其他好文   时间:2015-05-06 12:35:08    阅读次数:131
【String to Integer (atoi) 】cpp
题目:Implementatoito convert a string to an integer.Hint:Carefully consider all possible input cases. If you want a challenge, please do not see below a...
分类:其他好文   时间:2015-05-05 21:33:48    阅读次数:193
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