poj 2350 Above Average

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;


int main()
{
    int _,i,n,ans;
    double a[1024],sum;
    scanf("%d",&_);
    while(_--)
    {
        scanf("%d",&n);
        sum=0;
        for(i=0;i<n;i++)
        {
            scanf("%lf",&a[i]);
            sum+=a[i];
        }
        sum=1.0*sum/n;
        ans=0;
        for(i=0;i<n;i++)
        {
            if(a[i]>sum) ans++;
        }
        sum=1.0*ans/n*100;
        printf("%.3f%%\n",sum);
    }
    return 0;
}