Error Correct System Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 527B Description Ford Prefect got a job as a web developer for a small company that makes towels. His current work ta…

[题目链接]:http://codeforces.com/contest/527/problem/B [题意] 给你两个字符串; 允许你交换一个字符串的两个字符一次: 问你这两个字符串最少会有多少个位置上的字符不同 [题解] 考虑一次交换能够造成的结果 ->不同的字符个数减少1 ->不同的字符个数减少2 先考虑减少1 记录第一个字符串哪些字符和第二个字符串的不一样记录下来 然后扫描第二个字符串的每个字符,找到不同字符的位置,看看第二个字符串那个位置的字符有没有在第一个字符串里面出现过(刚才有记…

Description Ford Prefect got a job as a web developer for a small company that makes towels. His current work task is to create a search engine for the website of the company. During the development process, he needs to write a subroutine for compari…

Ford Prefect got a job as a web developer for a small company that makes towels. His current work task is to create a search engine for the website of the company. During the development process, he needs to write a subroutine for comparing strings S…

 Error Correct System Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 527B Description Ford Prefect got a job as a web developer for a small company that makes towels. His current work t…

time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are nn students in a university. The number of students is even. The ii-th student has programming skill equal to aiai. The coach wants…

上一次我们拿学校的URP做了个小小的demo.... 其实我们还可以把每个学生的证件照爬下来做成一个证件照校花校草评比 另外也可以写一个物理实验自动选课... 但是出于多种原因,,还是绕开这些敏感话题.. 今天,我们来扒一下cf的题面! PS:本代码不是我原创 1. 必要的分析 1.1 页面的获取 一般情况CF的每一个 contest 是这样的: 对应的URL是:http://codeforces.com/contest/xxx 还有一个Complete problemset页面,它是这样的:…

http://codeforces.com/contest/738/problem/D Galya is playing one-dimensional Sea Battle on a 1 × n grid. In this game a ships are placed on the grid. Each of the ships consists of bconsecutive cells. No cell can be part of two ships, however, the shi…

http://codeforces.com/contest/738/problem/C Vasya is currently at a car rental service, and he wants to reach cinema. The film he has bought a ticket for starts in t minutes. There is a straight road of length s from the service to the cinema. Let's…

http://codeforces.com/contest/738/problem/A Polycarp has interviewed Oleg and has written the interview down without punctuation marks and spaces to save time. Thus, the interview is now a string s consisting of n lowercase English letters. There is…