#include <fstream>
using namespace std;
ifstream f("elmaj.in");
ofstream g("elmaj.out");
int a[100001];
int main()
{
    int cnt=0,i,n,majoritar;
    f>>n;
    for(i=1;i<=n;i++)
    {
       f>>a[i];
        if(cnt==0)
        {
            majoritar=a[i];
        }
        else
        {
            if(a[i]==majoritar)
                cnt++;
            else
                cnt--;
        }
    }
    int cnt1=-0;
    for(i=1;i<=n;i++)
        if(a[i]==majoritar)
            cnt1++;
    if(cnt1>n/2)
        g<<"DA "<<majoritar;
    else
        g<<"NU";
    return 0;
}