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Codeforces Round #396 (Div. 2) D题Mahmoud and a Dictionary(并查集)解题报告
Mahmoud wants to write a new dictionary that contains n words and relations between them. There are two types of relations: synonymy (i. e. the two wo ...
分类:其他好文   时间:2017-02-10 01:11:32    阅读次数:386
css3怎么分清伪类和伪元素
伪类用于向某些选择器添加特殊的效果。 伪元素用于将特殊的效果添加到某些选择器。 伪类有::first-child ,:link:,vistited,:hover,:active,:focus,:lang 伪元素有::first-line,:first-letter,:before,:after 使用 ...
分类:Web程序   时间:2017-02-09 16:06:05    阅读次数:182
leetcode 17 Letter Combinations of a Phone Number
class Solution { public: vector<string> letterCombinations(string digits) { vector<string> res; if (digits.empty()) return res; string dict[] = {"abc" ...
分类:其他好文   时间:2017-02-08 23:13:50    阅读次数:182
rabbitmq使用dead letter机制来进行retry
rabbitmq使用dead letter机制来进行retry 首先建立 工作exchange和工作queue,指定工作队列的x-dead-letter-exchange到重试exchenge var workQueueArgs = new Dictionary<string, object> { ...
分类:其他好文   时间:2017-02-07 10:41:58    阅读次数:197
LeetCode:459. Repeated Substring Pattern
package Today;//LeetCode:459. Repeated Substring Pattern/* Given a non-empty string check if it can be constructed by taking a substring of it and app ...
分类:其他好文   时间:2017-02-06 13:09:33    阅读次数:159
方法调用中的别名问题
还是《Java编程思想》上的一个问题: “将一个对象传递给方法时,也会产生别名问题:”以下是示例: 其输出结果为: 1: x.c = a 2: x.c = z 然后作者又说 “在许多编程语言中,方法f()似乎要在它的作用域内复制其参数Letter y的一个副本;但实际上只是传递了一个引用。所以代码行 ...
分类:其他好文   时间:2017-02-04 12:29:51    阅读次数:215
USACO 4.3 Letter Game (字典树)
Letter games are popular at home and on television. In one version of the game, every letter has a value, and you collect letters to form one or more ...
分类:其他好文   时间:2017-02-02 12:15:33    阅读次数:213
两种方法思考密码安全性
方法一: #前置条件symbol='~!@#$%^&*()_=-/,.?<>;:[]{}\|'letter='abcdefghijklmnopqrstuvwxyz'nums='0123456789'#判断密码安全性的程序print('您好,请输入密码:')passwd=input()#首先判断一下用 ...
分类:其他好文   时间:2017-01-31 16:49:03    阅读次数:246
UNIX Tutorial Three
3.1 Redirection Most processes initiated by UNIX commands write to the standard output (that is, they write to the terminal screen), and many take the ...
分类:其他好文   时间:2017-01-28 09:22:57    阅读次数:236
Leetcode:389.Find the Difference
题目: Given two strings s and t which consist of only lowercase letters. String t is generated by random shuffling string s and then add one more letter ...
分类:其他好文   时间:2017-01-25 14:25:48    阅读次数:187
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