#include <iostream>
using namespace std;
int main()
{
    int mark;
    cin>> "Enter mark";
    cout<< "Your grade";
    if (mark <40%){
    cout<< "Your grade F ";
    }
    else if (mark >=40% && mark <45%){
        cout<< "Your grade D";
    }
     else if (mark >=45% && mark <50%){
        cout<< "Your grade C";
    }
     else if (mark >=50% && mark <55%){
        cout<< "Your grade C+";
    }
     else if (mark >=55% && mark <60%){
        cout<< "Your grade B-";
    }
     else if (mark >=60% && mark <65%){
        cout<< "Your grade B";
    }
     else if (mark >=65% && mark <70%){
        cout<< "Your grade B+";
    } else if (mark >=70% && mark <75%){
        cout<< "Your grade A-";
    } else if (mark >=75% && mark <80%){
        cout<< "Your grade A";
    }
     else if (mark >=80%){
        cout<< "Your grade A+";
    }
    return 0;
}