#include<iostream>
using namespace std;
int main()
{
    int marks;

    cout<<"Enter your marks for checking your grade: ";
    cin>>marks;

    if(marks>=0 && marks<40)
    {
        cout<<"Your grade is F "<<endl;
    }
    else if(marks>=40 && marks<45)
    {
        cout<<"Your grade is C- "<<endl;
    }
    else if(marks>=45 && marks<50)
    {
        cout<<"Your grade is C "<<endl;
    }
    else if(marks>=50 && marks<55)
    {
        cout<<"Your grade is C+ "<<endl;
    }
    else if(marks>=55 && marks<60)
    {
        cout<<"Your grade is B- "<<endl;
    }
    else if(marks>=60 && marks<65)
    {
        cout<<"Your grade is B "<<endl;
    }
    else if(marks>=65 && marks<70)
    {
        cout<<"Your grade is B+ "<<endl;
    }
    else if(marks>=70 && marks<75)
    {
        cout<<"Your grade is A- "<<endl;
    }
    else if(marks>=75 && marks<80)
    {
        cout<<"Your grade is A "<<endl;
    }
    else if(marks>=80 && marks<=100)
    {
        cout<<"Your grade is A+ "<<endl;
    }
    else
    {
        cout<<"Please enter any number between 0 to 100"<<endl;
    }

}