poj 2311 Cutting Game 博弈论

思路:求SG函数!!

代码如下:

 

 1 #include<iostream>
 2 #include<cstdio>
 3 #include<cmath>
 4 #include<cstring>
 5 using namespace std;
 6 int sg[202][202];
 7 int getsg(int m,int n)
 8 {
 9     if(sg[m][n]!=-1) return sg[m][n];
10     bool vis[200];
11     memset(vis,0,sizeof(vis));
12     for(int i=2;i<=m/2;i++) vis[getsg(i,n)^getsg(m-i,n)]=1;
13     for(int i=2;i<=n/2;i++) vis[getsg(m,i)^getsg(m,n-i)]=1;
14     int i=0;
15     while(vis[i]) i++;
16     return sg[m][n]=i;
17 }
18 int main()
19 {
20     memset(sg,-1,sizeof(sg));
21     int m,n;
22     while(cin>>m>>n) puts(getsg(m,n)?"WIN":"LOSE");
23     return 0;
24 }
View Code

 

 

 

posted @ 2013-09-12 13:12  _随心所欲_  阅读(174)  评论(0编辑  收藏  举报