#include <iostream>

using namespace std;

int main()
{
   int speed = 1;

   while(speed > 0)
   {
      cout<<"Enter the speed: "<<endl;
      cin>>speed;

      if(speed < 55)
      {
         cout<<"Too slow!\n"<<endl;
      }
      else if(speed < 71)
      {
         cout<<"You're doing great!\n"<<endl;
      }
      else
      {
         cout<<"Slow down buddy!\n"<<endl;
      }
   }

   return 0;
}