GeoDefense Time Limit: 12000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 745 Accepted Submission(s): 307 Problem Description Tower defense is a kind of real-time strategy computer games. The goal of towe…
树形DP,和背包差不多.dp[now][x]表示now这个节点的子树上,花费为x的时候,获得的最大防御能力(保证敌方HP<=0) #include<cstdio> #include<cstring> #include<queue> #include<algorithm> using namespace std; + ; int T, n, m; vector<int>tree[maxn]; struct kind { int price;…
Desiderium Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5481 Description There is a set of intervals, the size of this set is n. If we select a subset of this set with equal probability, how many the expected…