题目: B. Shashlik Cooking time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output Long story short, shashlik is Miroslav's favorite food. Shashlik is prepared on several skewers simultaneously. There…

Long story short, shashlik is Miroslav's favorite food. Shashlik is prepared on several skewers simultaneously. There are two states for each skewer: initial and turned over. This time Miroslav laid out nn skewers parallel to each other, and enumerat…

http://codeforces.com/problemset/problem/1040/B Long story short, shashlik is Miroslav's favorite food. Shashlik is prepared on several skewers simultaneously. There are two states for each skewer: initial and turned over. This time Miroslav laid out…

[链接] 我是链接,点我呀:) [题意] 在这里输入题意 [题解] 翻转一次最多影响2k+1个地方. 如果n<=k+1 那么放在1的位置就ok.因为能覆盖1..k+1 如果n<=2k+1 那么就放在1+k的位置就ok.能覆盖1..2k+1 其他情况 考虑temp=n%(2k+1)的值. 如果temp==0 那么美滋滋.直接操作n/(2k+1)次就ok, 分别在1+k,1+k+2k+1,1+k+2k+1+2k+1.... 刚好占据n个位置. 如果k+1<=temp<=2k 那么我们可…

Long story short, shashlik is Miroslav's favorite food. Shashlik is prepared on several skewers simultaneously. There are two states for each skewer: initial and turned over. This time Miroslav laid out nn skewers parallel to each other, and enumerat…

A.codeforces1038A You are given a string ss of length nn, which consists only of the first kk letters of the Latin alphabet. All letters in string ss are uppercase. A subsequence of string ss is a string that can be derived from ss by deleting some o…

A. Duff and Meat Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/588/problem/A Description Duff is addicted to meat! Malek wants to keep her happy for n days. In order to be happy in i-th day, she needs to eat exactly aikilo…

Problem D. Dinner ProblemTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100342/attachments Description A group of k students from Cooking University living in the campus decided that each day of the semester one of them will p…

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…