// fathi mohamed fathi rezq bekhit

#include <iostream>
#include <iomanip>
using namespace std;

void sum(int);


int main()
{
	int number;
	int number2;

int grade;
int count;
cout << "90 to 100 A" << endl;
cout << "80 to 89 B" << endl;
cout << "70 to 79 C" << endl;
cout << "60 to 69 D" << endl;
cout << "0 to 59 F" << endl;
cout << endl << "enter the number of grades" << endl; 
cin >> number;

number2 = number+0;


for ( number =0; number < number2; number++)
{
	cout << "Enter a numeric grade between 0-100" << endl;
	cin >> grade;
	
	count= grade + count;
}
 sum (count);
	return 0;
}
void sum (int grade)
{
	if ( grade >= 90 && grade <=100)
	{
		cout << "the grade is A";
	}
	else if ( grade >= 0 && grade <=59)
	{
		cout << "the grade is F";
	}
	else if ( grade >= 80 && grade <=89)
	{
		cout << "the grade is B";
	}
	else if ( grade >= 70 && grade <=79)
	{
		cout << "the grade is C";
	}
	if ( grade >= 60 && grade <=69)
	{
		cout << "the grade is D";
	}
	
}