HDU Rabbit and Grass 兔子和草 （Nim博弈）

#include <iostream>
using namespace std;
int main()
{
//freopen("input.txt", "r", stdin);
int t, n, m;
while(cin>>t,t)
{
int ans,tmp;
cin>>ans;
for(int i=1; i<t; i++)
{
cin>>tmp;
ans^=tmp;
}
if(ans)
cout<<"Rabbit Win!"<<endl;
else
cout<<"Grass Win!"<<endl;
}
return 0;
}