/**
 * Apr 16, 2016 7:02:06 PM
 * PrjName: Bc80-01
 * @semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        int T=in.nextInt();
        while(T-->0){
            int n=in.nextInt();
            boolean ans1=false,ans2=false;
            for(int i=1;i<=n;i++){
                int k=in.nextInt();
                if (k==0)
                    ans1=true;
                if (k==1)
                    ans2=true;
            }
            out.println(ans1&&ans2?"YES":"NO");
        }
        out.flush();
        out.close();
    }

}
class InputReader {
    public BufferedReader reader;
    public StringTokenizer tokenizer;

    public InputReader(InputStream stream) {
        reader = new BufferedReader(new InputStreamReader(stream), 32768);
        tokenizer = null;
    }

    public boolean hasNext() {
        return tokenizer != null && tokenizer.hasMoreTokens() || nextLine() != null;
    }

    public String nextLine() {
        String tmp = null;
        try {
            tmp = reader.readLine();
            tokenizer = new StringTokenizer(tmp);
        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (NullPointerException e) {
            return null;
        }
        return tmp;
    }

    public String next() {
        while (tokenizer == null || !tokenizer.hasMoreTokens()) {
            try {
                tokenizer = new StringTokenizer(reader.readLine());
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return tokenizer.nextToken();
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }

    public long nextLong() {
        return Long.parseLong(next());
    }

    public double nextDouble() {
        return Double.parseDouble(next());
    }
}