#include <cstdio>
#include <algorithm>

using namespace std;

int T,n,a[1000009],cnt;
int main(){
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        cnt=0;
        for (int i=1;i<=n;i++){
            scanf("%d",&a[i]);
            if (a[i]==0) cnt++;
        }
        if (cnt%2==1){
            printf("NO\n");
        }
        else printf("YES\n");
    }
}