Method pop

src/class164/Code04_Journey1.java:171–176

()

	}

	public static void pop() {
		--stacksize;
		u = ufe[stacksize][0];
		f = ufe[stacksize][1];
		e = ufe[stacksize][2];
	}

	// dfs2是dfs1的迭代版
	public static void dfs2(int cur, int fa) {