sir13

#include <fstream>
using namespace std;
ifstream f("sir13.in");
ofstream g("sir13.out");
int a,b=-1,c=-1,ok;

int main()
{
    while(f>>a&&ok==0)
    {
        if(a%2==0&&(b==-1||a>=b))
            b=a;
        else
        {
            if(a%2==1&&(c==-1||a<=c))
            {
                c=a;
            }
            else
            {
                if(a%2==0&&a<b)
                {
                    ++ok;
                }
                else
                    if(a%2==1&&a>c)
                    {
                        ++ok;
                    }
            }
        }
    }
    f.close();
    if (ok == 0)
	    g<<"DA";
    else
	    g<<"NU";
    g.close();
	return 0;
}