Method up

src/class153/FollowUp1.java:34–36

(int i)

	public static int[] size = new int[MAXN];

	public static void up(int i) {
		size[i] = size[left[i]] + size[right[i]] + 1;
	}

	public static int lr(int i) {
		return right[father[i]] == i ? 1 : 0;