#include<iostream>
#include<string>
#include<iomanip>
using namespace std ;
int main()
{
    string mem;
    int dis;
    float dur,cost,x;
    cin>>member>>dis>>dur;
    if(member=="Basic")
    {
        cost=(dur*30);
        if(dis==1)
        {
            x=cost-(cost*20)/100;
            cout<<fixed<<setprecision(2)<<x
        }
        else if (dis==0)
        {
            cout<<fixed<<setprecision(2)<<cost;
        }
        else{
            cout<<"Invalid input";
        }
    }
       else if (member=="standard")
       {
           cost=(dur*50);
        if(dis==1){
            x=cost-(cost*20)/100
            cout<<fixed<<setpercision(2)<<cost;
            
        }
        else if(dir==0){
            cout<<fixed<<setprecision(2)<<cost;
        }
           else
           {
               cout<<"Invalid input";
           }
        else{
            cout<<"Invalid input";
               
           }
            
        
       }
}