using System;
public class Program
{
public static void Main()
int score = 82;
char grade ;
if (score >= 90)
grade = 'A';
}
else if (score >= 80)
grade = 'B';
else if (score >= 70)
grade = 'C';
else if (score >= 60)
grade = 'D';
else
grade = 'F';
Console.WriteLine(grade);