#include <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <functional>
#include <iomanip>
#include <cctype>
#include <cstdlib>
#include <cstring>
#define rep(a,b) for(i=a;i<b;i++)
using namespace std;
typedef long long ll;
const int MOD=1e9+7;
const int maxn=1e5+10;
int a[maxn];
int main()
{
    int t;scanf("%d",&t);
    while(t--){
        memset(a,0,sizeof(a));
        int n,i,j,x;
        scanf("%d",&n);
        for(i=0;i<n;i++){
            scanf("%d",&x);
            if(x==1||x==0)a[x]=1;
        }
        if(a[0]&&a[1])printf("YES\n");
        else printf("NO\n");
    }
    return 0;
}