Method cut

src/class201/Code07_Network1.java:164–170

(int x, int y)

	}

	public static void cut(int x, int y) {
		makeroot(x);
		if (findroot(y) == x && fa[y] == x && ls[y] == 0 && rs[x] == y) {
			fa[y] = rs[x] = 0;
			up(x);
		}
	}

	public static int node(int c, int x) {
		return c * n + x;