#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
	cin.sync_with_stdio(0);
	cin.tie(0);
	int T;
	cin >> T;
	while(T--) {
		int N;
		cin >> N;
		long long S = 0;
		for(int i = 0, a; i < N; i++) {
			cin >> a;
			S += a;
		}
		// S = (2x)*(N/2)+(2y+1)*(N/2)
		cout << (((S-N/2)%N == 0) ? "YES\n" : "NO\n");
	}
}