#include<iostream>
#include<string>
#include<iomanip>
using namespace std;
int main()
{
    string m;
    int d;
    float a;
    int c,f;
   
    cin>>m;
    cin>>d;
    cin>>a;
    cout<<"fixed"<<setprecision(2);
    if(d||a<0)
    {
        cout<<"Invalid input";
    }
    else if(m=="Basic"&&d=1)
    {
        f=(a*30)*10/100;
        c=a*30;
        cout<<c-f;
    }
    else if(m="Basic"&&d=0)
    {
        cout<<a*30;
    }
    else if(m="Standard"&&d=1)
    {
        f=(a*50)*10/100;
        c=a*50;
        cout<<c-f;
    }
    else if(m="Standard"&&d=0)
    {
        cout<<a*50;
    }
        else if(m="Premium"&&d=1)
    {
        f=(a*80)*10/100;
        c=a*80;
        cout<<c-f;
    }
    else if(m=="Premium"&&d=0)
    {
         cout<<a*80;
    }
    
    return 0;
}