#include <iostream>
#include <vector>
#include <cmath>
using namespace std;
 
void solve() {
    int n;
    cin >> n;
 
    long long total = 0;
    for (int i = 0; i < n; ++i) {
        int a;
        cin >> a;
        total += a;
    }
 
    long long root = sqrt(total);
    if (root * root == total) {
        cout << "YES\n";
    } else {
        cout << "NO\n";
    }
}
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int t;
    cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}

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5
1
9
2
14 2
7
1 2 3 4 5 6 7
6
1 3 5 7 9 11
4
2 2 2 2