CLLCM.cpp

#include<bits/stdc++.h>
using namespace std;
const int MAXN = 1e3 + 5;
 
int n;
int arr[MAXN];
 
void solve(){
    int i = 0;
    for(i = 0; i < n; i++){
        if(!(arr[i] % 2)){
            cout << "NO\n";
            return;
        }
    }
    cout << "YES\n";
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t;
    cin >> t;
    while(t--){
        cin >> n;
        int i = 0;
        for(i = 0; i < n; i++)
            cin >> arr[i];
        solve();
    }
    return 0;
}