永夜莫明的博客

https://cn.vjudge.net/contest/312853#problem/F New Year is coming in Tree World! In this world, as the name implies, there arencities connected byn - 1roads, and for any two distinct cities there ...

问题 K: Kejin Player 时间限制: 2 Sec内存限制: 128 MB 提交: 42解决: 26 [提交] [状态] [命题人:admin] 题目描述 Cuber QQ always envies those Kejin players, who pay a lot of RMB to get a higher level in the game. So he wo...

Given a directed graph with no loops which starts at node 11 and ends at node nn. There is a robot who starts at 11, and will go to one of adjacent nodes or stand still with equal probability every...