import java.util.*;

public class solution {

  static int calcAngle(double ha, double ma) {

    if (ha == 12)

      ha = 0;

    if (ma == 60)

      ma = 0;

    int hour_angle = (int)(0.5 * (ha * 60 + ma));

    int minute_angle = (int)(6 * ma);

    int angle = Math.abs(hour_angle - minute_angle);

    angle = Math.min(360 - angle, angle);

    return angle;

  }

  public static void main(String[] args)

  {

    Scanner scan = new Scanner(System.in);

    System.out.print("Input angles move by hour hand: ");

    int ha = scan.nextInt();

    System.out.print("Input angles move by minute hand: ");

    int ma = scan.nextInt();

    if (ha < 0 || ma < 0 || ha > 12 || ma > 60) {

      System.out.println("Wrong input..!");

    } else {

      System.out.println("Angle between hour and minute hands " + calcAngle(ha, ma) + " degree.");

    }

  }

}