摘要：
Lifting the Stone 题目链接： http://acm.hust.edu.cn/vjudge/contest/130510 problem/G Description There are many secret openings in the floor which are cover 阅读全文
摘要：
Labyrinth 题目链接： http://acm.hust.edu.cn/vjudge/contest/130510 problem/E Description The northern part of the Pyramid contains a very large and complica 阅读全文