using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Masukan nilai");

        int nilai=int.Parse(Console.ReadLine());

        if(nilai==80 || nilai==100) 

        {

            Console.WriteLine("Sangat baik");

    }

    else if(nilai>=70 && nilai <=79)

    {

        Console.WriteLine("Baik");

    }

    else if(nilai >=60 && nilai <=69)

    {

        Console.WriteLine("Cukup");

    }

    else if(nilai <=59)

    {

        Console.WriteLine("Kurang");

}}}