#include <iostream>
using namespace std;
class customer {
    public :
    void cNAME(string name){
        cout<<name<<" ";
        
    }
};
class Meter{
    public:
    int units (int unit){
        return unit;
    }
};
class Bill :public Customer ,public Meter{
    public :
    void total(int u){
        int unit=units(u);
        int t=unit*5+50;
        cout<<t<<endl;
        
    } 
};
int main()
{
    string name;
    int units;
    cin>>name>>units;
    if(units<0){
        cout<<"invaljd input";
        return 0;
    }
    Bill obj;
    obj.cNAME(name);
    obj.total(units);
    return 0;
}