#include<iostream>
#include<string>
#include<iomanip>
using namespace std;
class user
{
    protected:
    string type, id;
    public:
        void display()
        {
            cin>>type>>id;
        }
};
class fitness
{
    protected:
    string goal, logs;
    public:
        void display1()
        {
            cin>>goal>>logs;
        }
};
class calories
{
    protected:
    int duration1, calories1, duration2, calories2, duration3, calories3;
    public:
    void display2()
    {
          cin>>duration1>>calories1>>duration2>>calories2>>duration3>>calories3;
    }
};
class average:public calories
{
    public:
    void min()
    {
        if(calories1<=0||calories2<=0||calories3<=0||duration1<=0||duration2<=0||duration3<=0||)
        {
            cout<<"Invalid input";
        }
        float csum, dsum, avg;
        csum=calories1+calories2+calories3;
        dsum=duration1+duration2+duration3;
        avg=csum/dsum;
        cout<<fixed<<setprecision(2)<<avg;
    }
};
int main()
{
    user u;
    fitness f;
    average a;
    u.display();
    f.display1();
    a.display2();
    a.min();
}