#include <iostream>
#include <string>
#include<iomanip>
using namespace std;

int main()
{
  int junior,senior;
  string trace;
  getline (cin,trace);
  cin>>junior>>senior;


  int participant=junior+senior;
  double money;
  double total_money;
  double discount;
  double tax;


  if(trace=="cross country")
  {
               if(participant>=50)
               {
                      discount=((junior*8)+(senior*9.50))*0.25;
                      money =(junior*8)+(senior*9.50)-discount;
                      tax=money*0.05;
                      total_money = money-tax;
                      cout<<fixed<<setprecision(2)<<total_money;
                      cout << "\n AAAAAAAAAAAAAAAAAAAAA";
               }
               else
               {
                     money=(junior*8)+(senior*9.50);
                     tax=money*0.05;
                 total_money = money-tax;
                 cout<<fixed<<setprecision(2)<<total_money;
                 cout << "\n BBBBBBBBBBBBBBBBBBBBBB";
               }
   }


   else if(trace=="trail")
      {
          money=(junior*5.50)+(senior*7);
          tax=money*0.05;
         total_money = money-tax;
         cout<<fixed<<setprecision(2)<<total_money;
      }



   else if(trace=="downhill")
           {
               money=(junior*12.25)+(senior*13.75);
               tax=money*0.05;
              total_money = money-tax;
              cout<<fixed<<setprecision(2)<<total_money;
           }


    else if (trace=="road")
           {
             money=(junior*20)+(senior*21.50);
             tax=money*0.05;
             total_money = money-tax;
            cout<<fixed<<setprecision(2)<<total_money;
             }


 return 0;

}