#include<iostream>
using namespace std;
int impar(int x[], int s, int d)
{  if(s==d)
       if(x[s]%2!=0)
             return 1;
       else
             return 0;
   else
  {  int m=(s+d)/2;
      return impar(x,s,m)+impar(x,m+1,d);
}
}
int main()
{ int x[100],n,i;
  cin>>n;
  for(i=0;i<n;i++)
   cin>>x[i];
  if(impar(x,0,n-1)>=1)
     cout<<"da";
else
   cout<<"nu";

return 0;

}

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