文件目录

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    int n, a[1005] = {};
    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> a[i];
    int ans = 0;
    for (int i = 1; i <= n; i++)
    {
        for (int j = i + 1; j <= n; j++)
        {
            int num = a[i] + a[j];
            int r = sqrt(num);
            if (r * r == num)
                ans++;
        }
    }
    cout << ans;
    return 0;
}