using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("โปรแกรมตัดเกรด");

        Console.Write("ใส่จำนวนคน : ");

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

        int[] score = new int[N+1];

        string[] Name = new string[N+1];

        for (int i= 1; i <= N; i++)

        {

        Console.Write("ใส่ชื่อคนที่" + i.ToString() + " : " );

        Name[i]  = Console.ReadLine();

        Console.Write("ใส่คะแนนคนที่" + i.ToString() + " : ");  

        score[i] = int.Parse(Console.ReadLine());

        }

        for (int i = 1; i <= N; i++)

        {

        string grade;

            if (score[i] >= 70)

            {

              grade = "A";

            }

        else if (score[i] >= 70)

        {

             grade = " B ";

        }

        else

        {

        grade = " F ";

        }

        //Console.WriteLine("No" + i.ToString() + "Name" + Name[i] + "Score" + score[i] + " ได้เกรด " + grade[i] );

            }

    }

}