HDU.1847 Good Luck in CET-4 Everybody! ( 博弈论 SG分析)

HDU.1847 Good Luck in CET-4 Everybody! ( 博弈论 SG分析)

题意分析

简单的SG分析

题意分析

简单的nim 博弈

博弈论快速入门

代码总览

//#include <cstdio>
//using namespace std;
//
//int main()
//{
//    int n;
//    while(scanf("%d",&n) != EOF){
//        if(n %3 == 0) printf("Cici\n");
//        else printf("Kiki\n");
//    }
//    return 0;
//}
#include <cstdio>
#include <cstring>
#define nmax 1005
using namespace std;
int maybe[] = {1,2,4,8,16,32,64,128,256,512,1024};
int sg[nmax];
int f[nmax];
void getSG()
{
    sg[0] = 0;
    for(int i = 1;i<nmax;++i){
        memset(f,0,sizeof f);
        for(int j = 0;j<10;++j){
            if(i-maybe[j] < 0)break;
            f[sg[i-maybe[j]]] = 1;
        }
        for(int j = 0;;++j){
            if(!f[j]){
                sg[i] = j;
                break;
            }
        }
    }
}
int main()
{
    getSG();
    int n;
    while(scanf("%d",&n) != EOF){
        if(sg[n]== 0) printf("Cici\n");
        else printf("Kiki\n");
    }
    return 0;
}