【poj2975】Nim

#include<cstdio>int n,a[1001];int main(){while(scanf("%d",&n)!=EOF){if(!n)return 0;int ans=0;for(int i=1;i<=n;i++)scanf("%d",&a[i]);for(int i=1;i<=n;i++){int s=0;for(int j=1;j<=n;j++)if(i!=j)s^=a[j];if(a[i]>s)ans++;}printf("%d\n",ans);}}