pb29

#include <iostream>

using namespace std;// ||sau

int main() {

       unsigned n,ok=1,uc=0,puc=0,nrcif=0;
       cout<<"n=";cin>>n;
       int cn=n;
       while (cn!=0) {
        nrcif++;
        cn/=10;
       }
       while (nrcif!=1&&ok==1) {
        uc=n%10;
        puc=(n/10)%10;
        if (puc!=uc)
              ok=0;

        n/=10;
        nrcif--;
       }

  if (ok)
   cout<<"DA";
    else
        cout<<"NU";

return 0;
}