// editor2
#include<iostream>
#include<string>
using namespace std;
int main(){
    int type;
    cin>>type;
    cin.ignore(1000,'\n');
}
string driver,passanger,route;
double distance;

getline(cin,driver);
getline(cin,passenger);
getline(cin,route);
cin<<distance;
else
cout<<"Invalid input";
if(type == 1)
cout<< distance*1.5<<endl
else if(type == 2)
cout<<"Invalid input";

return 0;
}