package fixjava;

public class StringUtils {

	/** Repeat the given string the requested number of times. */
	public static String repeat(String str, int numTimes) {
		StringBuilder buf = new StringBuilder(Math.max(0, str.length() * numTimes));
		for (int i = 0; i < numTimes; i++)
			buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the left hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padLeft(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(padChar);
		for (int i = 1, mi = bufSize - str.length(); i < mi; i++)
			buf.append(padChar);
		buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the right hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padRight(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(str);
		buf.append(padChar);
		while (buf.length() < bufSize)
			buf.append(padChar);
		return buf.toString();
	}

	/** Intern all strings in an array, skipping null elements. */
	public static String[] intern(String[] arr) {
		for (int i = 0; i < arr.length; i++)
			arr[i] = arr[i].intern();
		return arr;
	}

	/** Intern a string, ignoring null */
	public static String intern(String str) {
		return str == null ? null : str.intern();
	}

}

package jp.funnything.competition.util;

public enum Direction {
    UP , DOWN , LEFT , RIGHT;

    public int dx() {
        switch ( this ) {
        case UP:
        case DOWN:
            return 0;
        case LEFT:
            return -1;
        case RIGHT:
            return 1;
        default:
            throw new RuntimeException( "assert" );
        }
    }

    public int dy() {
        switch ( this ) {
        case UP:
            return -1;
        case DOWN:
            return 1;
        case LEFT:
        case RIGHT:
            return 0;
        default:
            throw new RuntimeException( "assert" );
        }
    }

    public Direction reverese() {
        switch ( this ) {
        case UP:
            return DOWN;
        case DOWN:
            return UP;
        case LEFT:
            return RIGHT;
        case RIGHT:
            return LEFT;
        default:
            throw new RuntimeException( "assert" );
        }
    }

    public Direction turnLeft() {
        switch ( this ) {
        case UP:
            return LEFT;
        case DOWN:
            return RIGHT;
        case LEFT:
            return DOWN;
        case RIGHT:
            return UP;
        default:
            throw new RuntimeException( "assert" );
        }
    }

    public Direction turnRight() {
        switch ( this ) {
        case UP:
            return RIGHT;
        case DOWN:
            return LEFT;
        case LEFT:
            return UP;
        case RIGHT:
            return DOWN;
        default:
            throw new RuntimeException( "assert" );
        }
    }
}
