[WF2012]infiltration 完全图 最多选择logn个点(下取整)(每选择一个点覆盖至少一半的规模) 暴力O(75^5)(不严格)枚举+bitset (随机化也可过) #include<bits/stdc++.h> #define reg register int #define il inline #define int long long #define numb (ch^'0') using namespace std; typedef long long ll; il v…
Problem H. Horrible Truth Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100610 Description In a Famous TV Show “Find Out” there are n characters and only one Horrible Truth. To make the series breathtaking all way long, the sc…
链接:https://www.nowcoder.com/acm/contest/104/B来源:牛客网 题意:A few days ago, WRD was playing a small game called Salty Fish Go. We can simplify the rules of the game as follows. 给你v,l,n,m代表有v个速度,下一行分别给出v个速度,l长的路,n个随机地点随机改变速度的加油站,m个随机地点宝藏.问拿到所有宝藏的时间期望. 题解:瞎…