#include<iostream>
using namespace std;
class A
{
    public:
    string name;
    cin>>name;
};
class B 
{
   public:
   int n;
   cin>>n;
};
class C : public A,public B
{
    public:
    void billing()
    {
    if(n>=0)
    {
    cout<<name;
    cout<<(int*5)+50;
    }
    else
    {
        cout<<"Invalid input";
    }
    }
};

int main()
{
   C obj;
   obj.billing();
   return 0;
}