itsa63 4正方形

#include<iostream>
using namespace std;

int main()
{
int n,sum,ans;
int m[1000];
sum = 0;
ans = 0;
cin >> n;
for (int i = 0;i < n; i++)
{
cin >> m[i];
sum += m[i];
}
for (int j = 0;j < n; j++)
{
if (m[j] > sum / 4)
ans = 1;
}
if (ans == 0)
cout << "yes" << endl;
else
cout << "no" << endl;
return 0;
}