博弈论入门之斐波那契博弈

#include<cstdio>
#include<map>
int fib[233],x;
std::map<int,bool>mp;
int main()
{
    fib[1]=1;fib[2]=1;
    for(int i=3;i<=50;i++) fib[i]=fib[i-1]+fib[i-2],mp[fib[i]]=1;
    while(scanf("%d",&x)&&x!=0)
        puts(mp[x]==1?"Second win":"First win");
    return 0;
}