#pragma comment(linker, "/STACK:102400000,102400000")
#include<cstring>
#include<cstdlib>
#include<cstdio>
#include<cmath>
#include<iostream>
using namespace std;
int n;
int main()
{
    int z;
    scanf("%d",&z);
    while(z--)
    {
        scanf("%d",&n);
        bool b0=0,b1=0;
        while(n--)
        {
            int x;
            scanf("%d",&x);
            if(x==0) b0=1;
            if(x==1) b1=1;
        }
        if(b0&b1) printf("YES\n");
        else printf("NO\n");
    }
    return 0;
}