D. Acyclic Organic Compounds You are given a tree T with n vertices (numbered 1 through n) and a letter in each vertex. The tree is rooted at vertex 1. Let's look at the subtree Tv of some vertex v. It is possible to read a string along each simple…
C. Kleofáš and the n-thlon Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/601/problem/C Description Kleofáš is participating in an n-thlon - a tournament consisting of n different competitions in n different disciplines (n…
D. Vasiliy's Multiset time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Author has gone out of the stories about Vasiliy, so here is just a formal task description. You are given q queries a…
C. Drazil and Park 题目连接: http://codeforces.com/contest/516/problem/C Description Drazil is a monkey. He lives in a circular park. There are n trees around the park. The distance between the i-th tree and (i + 1)-st trees is di, the distance between t…
题目链接: http://codeforces.com/contest/706/problem/D D. Vasiliy's Multiset time limit per test:4 secondsmemory limit per test:256 megabytes 问题描述 Author has gone out of the stories about Vasiliy, so here is just a formal task description. You are given q…
B. Lipshitz Sequence Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/601/problem/B Description A function is called Lipschitz continuous if there is a real constant K such that the inequality |f(x) - f(y)| ≤ K·|x - y| hold…
C. The Two Routes Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/602/problem/C Description In Absurdistan, there are n towns (numbered 1 through n) and m bidirectional railways. There is also an absurdly simple road networ…
B. Approximating a Constant Range Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/602/problem/B Description When Xellos was doing a practice course in university, he once had to measure the intensity of an effect that slowl…
A. Two Bases Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/602/problem/A Description After seeing the "ALL YOUR BASE ARE BELONG TO US" meme for the first time, numbers X and Y realised that they have different bases,…
B. Approximating a Constant Range Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/602/problem/B Description When Xellos was doing a practice course in university, he once had to measure the intensity of an effect that slowl…
