Magical Bamboos

#include<stdio.h>
int main()
{
    int i,j,k,l,t,n,h,x;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d",&n);
        scanf("%d",&h);
        x=0;
        k=h%2;
        for(i=1;i<n;i++)
        {
            scanf("%d",&h);
            if(h%2!=k) x=1;
        }
        if(x==1) printf("no\n");
        if(x==0) printf("yes\n");
    }
}