#include <iostream>
using namespace std;
class Grade
{
    int Mark1,Mark2,Mark3,Total,Avg;
    public:
    void getdata();
    void check();
};
void Grade::getdata()
{
    cout<<"\n Enter a Marks : ";
    cin>>Mark1>>Mark2>>Mark3;
    cout<<Mark1<<" , "<<Mark2<<" , "<<Mark3<<endl;
    cout<<"\n Mark1 : "<<Mark1<<endl;
    cout<<"\n Mark2 : "<<Mark2<<endl;
    cout<<"\n Mark3 : "<<Mark3<<endl;
}
void Grade:: check()
{
    Total=Mark1 + Mark2 + Mark3;
    cout<<"\n Total Marks : "<<Total<<endl;
    Avg=Total/3;
    cout<<"\n Average : "<<Avg<<endl;
    if(Avg>=35)
    {
        if(Avg>80)
            cout<<"\n Your Grade : A "<<endl;
        else if (Avg<=80 && Avg>60)   
            cout<<"\n Your Grade : B "<<endl;
        else if (Avg<=60 && Avg>45) 
            cout<<"\n Your Grade : C "<<endl;
        else
            cout<<"\n Your Grade : D "<<endl;
    }
    else
    {
        cout<<"\n Your Grade : E "<<endl;
    }
}    
int main()
{
    Grade n;
    n.getdata();
    n.check();
    return 0;
}