#include <bits/stdc++.h>
using namespace std;

void mainSolve()
{
  string prac = "https://www.codechef.com/practice";
  string cont = "https://www.codechef.com/contests";
  string disc = "https://discuss.codechef.com";
  int A,B;
  cin >> A >> B;
  if(A==0)
    cout << prac << endl;
  else if(B==0)
    cout << cont << endl;
  else
    cout << disc << endl;
}

int main()
{
  int t=1;
  while (t--)
  {
    mainSolve();
  }
  return 0;
}