import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scan= new Scanner(System.in);
        int n=scan.nextInt();
        int k,f=0;
        String[] yn=new String[n];
        int[] arr=new int[10005];
        for (int i = 0; i < n; i++) {
             k=scan.nextInt();
            for (int j = 0; j < k; j++) {
                arr[j]=scan.nextInt();
                for (int j2 = 0; j2 <k; j2++) {
                    if(arr[j]==0){
                        f=1;
                        yn[i]="yes";
                        break;
                    }
                }
                if(f==0){
                    yn[i]="no";
                }
            }
        }
        for (int i = 0; i < n; i++) {
            System.out.println(yn[i]);
        }

        scan.close();
    }
}