#include<iostream>
#include<string>
#include<iomanip>
using namespace std;
int main()
{
    string membershipType;
    int discountStatus;
    float duratiion;
    cin>>mambershipType>>discountStatus>>duration;
    if((membershipType != "Basic" && mambershipType != "Standard" && mambershipType != "Premium") ||
    discountStatus < 0 || discountStatus n> 1 || duration < 0.0 || duration > 10.0)
    {
        cout<<"Invalid input"<<endl;
        return 0;
    }
    float monthlyCost;
    if(membershipType =="Basic")
         monthlyCost = 30.0;
    else if(membershipType =="Standard")
         monthlyCost = 80.0;
    float total = monthlyCost = duration;
    if(discountStatus == 1)
         total *= 0.8;
    cout<<fixed<<setprecision(2)<<total<<endl;
    return 0;
}