2017年9月26日
Codeforces Round #436 (Div. 2)（ABCDE）
摘要： A. Fair Game Petya and Vasya decided to play a game. They have n cards (n is an even number). A single integer is written on each card. Before the gam 阅读全文
posted @ 2017-09-26 16:17 starry_sky 阅读(249) 评论(0) 推荐(0)