E. Hyakugoku and Ladders Hyakugoku has just retired from being the resident deity of the South Black Snail Temple in order to pursue her dream of becoming a cartoonist. She spent six months in that temple just playing "Cat's Cradle" so now she w…

D. Bad Luck Island Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/540/problem/D Description The Bad Luck Island is inhabited by three kinds of species: r rocks, s scissors and p papers. At some moments of time two random i…

题目链接: http://codeforces.com/problemset/problem/148/D D. Bag of mice time limit per test2 secondsmemory limit per test256 megabytes 问题描述 The dragon and the princess are arguing about what to do on the New Year's Eve. The dragon suggests flying to the…

D. Ilya and Escalator time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Ilya got tired of sports programming, left university and got a job in the subway. He was given the task to determine…

D. Name That Tune time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output It turns out that you are a great fan of rock band AC/PE. Peter learned that and started the following game: he plays the f…

                                                                               D. Painting The Wall   User ainta decided to paint a wall. The wall consists of n2 tiles, that are arranged in an n × n table. Some tiles are painted, and the others are n…

Codeforces Round #267 (Div. 2) C. George and Job题目链接请点击~ The new ITone 6 has been released recently and George got really keen to buy it. Unfortunately, he didn't have enough money, so George was going to work as a programmer. Now he faced the follow…

A - Good ol' Numbers Coloring 题意:有无穷个格子,给定 \(a,b\) ,按以下规则染色: \(0\) 号格子白色:当 \(i\) 为正整数, \(i\) 号格子当 \(i\geq a\) 且 \(i-a\) 是白色格子时涂白色:当 \(i\) 为正整数, \(i\) 号格子当 \(i\geq b\) 且 \(i-b\) 是白色格子时涂白色:仍不是白色的涂黑色,问黑色格子是否有无穷个. 题解:好像做过很多次了,遍历所有的整数的充要条件是这些拿来线性组合的步长的gcd…

链接: https://codeforces.com/contest/1245/problem/D 题意: Shichikuji is the new resident deity of the South Black Snail Temple. Her first job is as follows: There are n new cities located in Prefecture X. Cities are numbered from 1 to n. City i is locate…

链接: https://codeforces.com/contest/1245/problem/C 题意: Constanze is the smartest girl in her village but she has bad eyesight. One day, she was able to invent an incredible machine! When you pronounce letters, the machine will inscribe them onto a pie…