using System;

public class Program

{

    public static void Main()

    {

        Console.Write("please enter a hour:");

        int hour = Convert.ToInt32(Console.ReadLine());

        Console.Write("please enter a minute:");

        int minute = Convert.ToInt32(Console.ReadLine());

        int total= 24 * 60;

        int hoursbeminute=hour * 60;

        int sum = hoursbeminute+minute; // با دقیقه کاربر

        int r =total - sum;

        Console.WriteLine(r);

    }

}