#include <iostream>
#include <string>

using namespace std;

int main() 
{	
	int marks;
	string name, grade;
	
	cout << "Enter your name : ";
    cin >> name;

    cout << "Enter your mark : ";
    cin >> marks;
	
	switch (marks)
	{
		case 90 ... 100 :   grade = "A+";
						 	break; 
		
		case 80 ... 89  :	grade = "A";
						 	break;
						 	
		case 75 ... 79  :   grade = "A-";
						 	break; 
						 	
		case 70 ... 74  :   grade = "B+";
						 	break; 
						 	
		case 65 ... 69  :   grade = "B";
						 	break;
							 
		case 60 ... 64  :	grade = "B-";
						 	break; 
							 
		case 55 ... 59  :	grade = "C+";
						 	break;
							 
		case 50 ... 54	:	grade = "C";
						 	break; 
							 
		case 45 ... 49	:	grade = "C-";
						 	break; 	
							 
		case 40 ... 44	:	grade = "D";
						 	break; 
		
		case 0 ... 39	:	grade = "F";
							break; 
												 
		default			: 	grade = "Invalid Marks";
						 	break; 								 				   
	}
	
	cout<<"\nYour name is : " << name << endl;
    cout<<"Your mark is : " << marks << endl;
    cout<<"Your grade is : "<< grade <<endl;
   return 0;
}