#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <string>
#include <set>
//#include <unordered_map>
using namespace std;
#define FOR(i, n, m) for(int i = n; i <= m; i++)
#define REP(i, n, m) for(int i = n; i >= m; i--)
#define PB push_back
#define MP make_pair
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> PII;
typedef pair<long long, int> PLI;

const int maxn = 200010;
const int maxm = 100010;

int main(){
        int t;
        cin>>t;
        int n, x;
        while(t--){
            cin>>n;
            bool flag1 = false, flag0 = false;
            while(n--) {
                cin>>x;
                if(x==1) flag1=true;
                if(x == 0) flag0 = true;
                }
            cout<<(flag1&&flag0?"YES":"NO")<<endl;
            }
        return 0;
        }