任意门:http://poj.org/problem?id=1984 Navigation Nightmare Time Limit: 2000MS Memory Limit: 30000K Total Submissions: 7783 Accepted: 2801 Case Time Limit: 1000MS Description Farmer John's pastoral neighborhood has N farms (2 <= N <= 40,000), usuall…
hash一下然后用带权并查集做模2下的前缀和 #include<iostream> #include<cstdio> #include<map> #include<algorithm> using namespace std; const int N=100005; int n,m,f[N],s[N],ans,g[N],tot,has,x[N],y[N],z[N]; char o[10]; map<int,int>mp; int read() {…
Cube Stacking Description Farmer John and Betsy are playing a game with N (1 <= N <= 30,000)identical cubes labeled 1 through N. They start with N stacks, each containing a single cube. Farmer John asks Betsy to perform P (1<= P <= 100,000) op…