#include <iostream>
using namespace std;
class person{
    public:
    void ename(string name){
        return ename;
    }
    int esalary(int salary){
        return salary;
    }
};
class employee:public person{
    public:
    void d;
}
int main(){
    string name;
    int units;
    cin>>name>>units;
    if (units<0){
        cout<<"Invalid input";
        return 0;
    }
    bill obj;
    obj.cname(name);
    obj.total(units);
    return 0;
}