#include <iostream>
using namespace std;
int main()
{
    int n,i,k=-10000,cresc=1;
    cin>>n;
    int v[n];
    for(i=1;i<=n;i++)
    {
        cin>>v[i];
        if(v[i]%2==0){
            if(v[i]>k){
                k=v[i];
            }
            else cresc=0;
        }
    }
    if(cresc)cout<<"DA";
    else cout<<"NU";

    return 0;
}