#include <iostream>

using namespace std;

int main()
{
   int n,a=0,b=0,c=0;

   cout <<"Podaj liczbe n"<<endl;
   cin >>n;

   for(a=0;a<=n;++a)
   {
       cout<<a;
   }

   for(a=n;a>=0;a--)
   {
       cout<<a;
   }

   while(b<=n)
    {
       cout<<b;
       b++;
    }

   while(b>=0)
    {
       cout<<b;
       b--;
    }


   do
   {
       cout<<c;
       c++;
   }
   while(c<=n);


   do
   {
       cout<<c;
       c--;
   }
   while(c>=0);

}