hdu 1850 Being a Good Boy in Spring Festival

#include<iostream>
#include<stdio.h>
#include<string.h>
using namespace std;
int main()
{
int a[110],sum,n,i,ans;
while(cin>>n)
{
if(n==0)
break;
sum=0;
ans=0;
for(i=0;i<n;i++)
{
scanf("%d",a+i);
sum^=a[i];
}
//printf("%d\n",sum);
for(i=0;i<n;i++)
{
if(a[i]>(sum^a[i]))
ans++;
}
printf("%d\n",ans);
}
return 0;
}