// editor4
#include<iostream>
#include<iomanip>
using namespace std;
class loan{
    public:
    void home(double amt,int y){
        double  (amt + 5.0)/100.0;
        cout<<fixed<<setprecision(2)<<n*y<<endl;
    }
    void personal(double amt, int y){
        double  (amt*10.0)/100.0;
        cout<<fixed<<setprecision(2)<<amt*y<<endl;
        
    }
};
int main(){
    string s;
    cin>>s;
    double amt;
    int y;
    if(!(cin>>amt>>y)){
        cout<<"Invalid input";
        return 0;
    }
    if(amt<0 ||y<0 ||y<30){
        cout<<"Invalid input";
        return 0;
    }
    loan obj;
    if(s=="home"){
        obj.home(amt,y);
    }
    else if(s=="personal"){
        obj.personal(amt,y);
    }
    else{
        cout<<"Invalid input";
    }
    return 0;
    }
}