Candy III

// http://www.spoj.com/problems/CANDY3/ #include <iostream>

using namespace std;

int main(int argc, char* argv[]) {
int t;
cin >> t;
while (t-- >0) {
long long candies;
long long remidner = 0;
long long n;
cin >> n;
for (long long i = 0; i < n; i++) {
cin >> candies;
remidner = (remidner + candies) % n;
}
if (remidner == 0) cout << "YES" << endl;
else cout << "NO" << endl;
}

}