摘要：
Recently a tournament in k kinds of sports has begun in Berland. Vasya wants to make money on the bets. The scheme of the tournament is very mysteriou 阅读全文
摘要：
http://codeforces.com/contest/879/problem/D This time the Berland Team Olympiad in Informatics is held in a remote city that can only be reached by on 阅读全文
摘要：
http://codeforces.com/contest/879/problem/C Petya learned a new programming language CALPAS. A program in this language always takes one non-negative 阅读全文
摘要：
http://codeforces.com/contest/879/problem/B n people are standing in a line to play table tennis. At first, the first two players in the line play a g 阅读全文