CLLCM.java

import java.io.IOException;
import java.io.InputStream;
import java.util.*;
 
class Solution {
    public static void main(String[] args) throws Exception {
        Scanner in=new Scanner(System.in);
        int i,j;
        int t=in.nextInt();
        while(t-->0){
            int n=in.nextInt();
            int arr[]=new int[n];
            int f=0;
            for(i=0;i<n;i++){
                arr[i]=in.nextInt();
                if(arr[i]%2==0)
                    f=1;
            }
            if(f==0)
                System.out.println("YES");
            else
                System.out.println("NO");
        }
    }
}