#include<iostream>
using namespace std;
int main() {
    int T, i, n,m;
    bool flag1, flag2;
    cin >> T;
    while (T--) {
        flag1 = flag2 = 0;
        cin >> n;
        for (i = 0; i < n; i++) {
            cin >> m;
            if (m == 0)
                flag1 = 1;
            else if (m == 1)
                flag2 = 1;
        }
        if (flag1&&flag2)
            cout << "YES" << endl;
        else
            cout << "NO" << endl;
    }
    return 0;
}