摘要：
题目链接：http://codeforces.com/problemset/problem/13/E Little Petya likes to play a lot. Most of all he likes to play a game «Holes». This is a game for o 阅读全文
摘要：
题目链接:http://codeforces.com/problemset/problem/13/C Little Petya likes to play very much. And most of all he likes to play the following game: He is gi 阅读全文