D. Magic Numbers 题目连接： http://www.codeforces.com/contest/628/problem/D Description Consider the decimal presen…

C. Heap Operations 题目连接： http://www.codeforces.com/contest/681/problem/C Description Petya has recently learne…

C. Hostname Aliases 题目连接： http://www.codeforces.com/contest/644/problem/C Description There are some websites …

E. Tree Folding 题目连接： http://codeforces.com/contest/765/problem/E Description Vanya wants to minimize a tree. …

C. Efim and Strange Grade 题目连接： http://codeforces.com/contest/719/problem/C Description Efim just received his…

D. Lizards and Basements 2 题目连接： http://codeforces.com/contest/6/problem/D Description This is simplified vers…

B. Bear and Finding Criminals 题目连接： http://www.codeforces.com/contest/680/problem/B Description There are n ci…

D. Professor GukiZ and Two Arrays 题目连接： http://www.codeforces.com/contest/620/problem/D Description Professor …

D. Dreamoon and Sets 题目连接： http://www.codeforces.com/contest/476/problem/D Description Dreamoon likes to play …

B. Dreamoon and WiFi 题目连接： http://www.codeforces.com/contest/476/problem/B Description Dreamoon is standing at…

A. Fashion in Berland 题目连接： http://www.codeforces.com/contest/691/problem/A Description According to rules of …

Codeforces Round #160 (Div. 1) A – Maxim and Discounts 题意 给你n个折扣，m个物品，每个折扣都可以使用无限次，每次你使用第i个折扣的时候，你必须买q[i…