#include <iostream>
using namespace std;
 
int main() {
	int grade ;
	cout << "enter ur grade \n " ;
	cin >> grade ;
	if(grade >= 90 && grade <= 100)
	{
		cout << "ur grade is A " ;
	}
	else if(grade >= 80 && grade <90)
	{
		cout << "ur grade is B " ;
	}
	else if(grade >= 70 && grade <80)
	{
		cout << "ur grade is C" ;
	}
	else if(grade >= 60 && grade <70)
	{
		cout << "ur grade is D" ;
	}
	else if (grade <60 && grade >= 0)
	{
		cout << "ur grade is F" ;
	}
	else{cout << "enter Valid grade" ;}
 
 
 
	return 0;
}

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OTA=

90