F.cpp

#include <bits/stdc++.h>
// #define pb push_back
// #define mp make_pair
// #define fr first
// #define sc second
// #define MOD 1000000007
// #define len(x) x.size()
// #define min3(a, b, c) min(a, min(b, c))
// #define max3(a, b, c) max(a, max(b, c))
// #define all(v) v.begin(), v.end()
// #define alla(a,n) a, a + n

using namespace std;

int32_t main() {

#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin) ;
    freopen("output.txt", "w", stdout) ;
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(NULL) ; cout.tie(NULL) ;

    int t ;
    cin >> t;
    while (t--) {
        int n, sum = 0;
        cin >> n;
        for (int i = 0; i < n; i++) {
            int x;
            cin >> x;
            sum += x;
        }
        if (sum % n == 0) cout << "Yes" << "\n";
        else cout << "No" << "\n";
    }

    return 0 ;

}