大佬求解
我10分

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,a[1010],ans=0;
    cin>>n;
    for (int i = 1; i <= n - 1; i++) 
    {
        cin>>a[i];
        for (int j = i + 1; j <= n; j++) 
        {
            int m = a[i] + a[j];
            int s = d(m);
            if (s * s == m)
                f++;
        }
    }
    cout<<f;
    return 0;
}