Method push

src/class199/Code04_RingRoad1.java:42–48

(int u, int status, int fa, int e)

	public static int stacksize, u, status, fa, e;

	public static void push(int u, int status, int fa, int e) {
		stau[stacksize] = u;
		stas[stacksize] = status;
		staf[stacksize] = fa;
		stae[stacksize] = e;
		stacksize++;
	}

	public static void pop() {
		--stacksize;