using System;

public class Program

{

    public static void Main()

    {

        AnglesOfClock(1, 30);

        AnglesOfClock(5, 18);

    }

    public static void AnglesOfClock(int hour, int minute)

    {

        double minuteAngle = minute * 6;

        double hourAngle = hour * 30 + minute * 0.5;

        Console.WriteLine(Math.Abs(minuteAngle - hourAngle));

    }

}