摘要：
http://lx.lanqiao.cn/problem.page?gpid=T120 问题描述 X 国王有一个地宫宝库。是 n x m 个格子的矩阵。每个格子放一件宝贝。每个宝贝贴着价值标签。 地宫的入口在左上角，出口在右下角。 小明被带到地宫的入口，国王要求他只能向右或向下行走。 走过某个格子时 阅读全文
摘要：
http://codeforces.com/contest/890/problem/C A very brave explorer Petya once decided to explore Paris catacombs. Since Petya is not really experienced 阅读全文
摘要：
http://codeforces.com/contest/890/problem/B Vlad likes to eat in cafes very much. During his life, he has visited cafes n times. Unfortunately, Vlad s 阅读全文