#include <iostream>
using namespace std;
long long t,n,a,s;
int main() {
ios_base::sync_with_stdio(true);
cin.tie(0);
cout.tie(0);
cin >> t;
while(t--) {
cin >> n;
s = 0;
for(int x=0; x<n; x++) {
cin>>a;
s+=a;
s%=n;
}
if(s%n==0) {
cout<<"YES\n";
}else {
cout<<"NO\n";
}
}
}