VerifParitate1

#include <iostream>
using namespace std;
short int n,v[205],ok;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n;
    for(int i=1;i<=n;++i)
        cin>>v[i];
    ok=1;
    for(int i=1;i<=n/2&& ok;++i)
        if((v[i]+v[n-i+1])%2==1)
            ok=0;
    if(ok)
        cout<<"DA";
    else
        cout<<"NU";
    return 0;
}