using System;

public class Program

{

    private static int MapHoursToMinutes(int hours){

        return (hours * 5) % 60;

    }

    private static int MinDiff(int m1, int m2){

        return Math.Min(Math.Abs(m1-m2), Math.Abs(60 - Math.Abs(m1-m2)));

    }

    public static decimal DegreesBetweenClockHands(int hours, int minutes) {

        return MinDiff(MapHoursToMinutes(hours), minutes) * 6;

    }

    public static void Main()

    {

        Console.WriteLine(DegreesBetweenClockHands(3,46));

    }

}