HDU 1850 Being a Good Boy in Spring Festival(sg函数)

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
int n;
int p[101];
int main()
{
int i,temp,ans,num;
while(scanf("%d",&n)!=EOF)
{
ans = 0;
if(!n) break;
for(i = 1; i <= n; i ++)
{
scanf("%d",&p[i]);
ans ^= p[i];
}
num = 0;
if(ans == 0)
printf("0\n");
else
{
for(i = 1; i <= n; i ++)
{
temp = ans;
temp ^= p[i];
if(p[i] >= temp)
num ++;
}
printf("%d\n",num);
}
}
return 0;
}