using System;

public class Program

{

    public static void Main()

    {

        //1. Read input from user

        //2. Validate this input (check whether it is a valid whole number)

        //3. Show the following information 

        // Input: >= 90, show message "You get A".

        // Input: 80 ~ 90, show message "You get B".

        // Input: 70 ~ 80, show message "You get C".

        // Input: 60 ~ 70, show message "You get D".

        // Input: <= 60, show message "You get F".

        //4. For individual's score greater than 90, check his/her major

        //Show "Congratulations! You are one of the best students in IS" if the major is IS

    }

}