Method prepare

src/class143/Code01_Elevator.java:56–62

()

	public static boolean[] visited = new boolean[MAXN];

	public static void prepare() {
		cnt = 1;
		heap.clear();
		Arrays.fill(head, 0, x, 0);
		Arrays.fill(distance, 0, x, Long.MAX_VALUE);
		Arrays.fill(visited, 0, x, false);
	}

	public static void addEdge(int u, int v, long w) {
		next[cnt] = head[u];