using System;

public class Program

{

    public static void Main()

    {

double not;

Console.Write("Notunuzu Girin :");

not = Convert.ToInt32(Console.ReadLine());

if(not<0)

{

Console.Write("HATALI NOT GİRDİNİZ");

}

else if(not<50)

{

Console.Write("notunuz(1)");

}

else if (not < 60)

{

Console.Write("notunuz (2)");

}

else if (not < 70)

{

Console.Write("notunuz (3)");

}

else if (not < 85)

{

Console.Write("notunuz (4)");

}

else if (not <= 100)

{

Console.Write("notunuz (5)");

}

 else if (not <= 300)

     Console.Write("HATALI NOT GİRDİNİZ");

Console.ReadLine(); 

    }

}