Exemple #1
0
 public static void BFS_Visit(Vertex<Integer> u) {
   Deque<Vertex<Integer>> q = new LinkedList<>();
   q.add(u);
   while (!q.isEmpty()) {
     Vertex<Integer> v = q.poll();
     v.setMarkState(Graph.VISIT_COLOR_GREY);
     for (Edge<Integer> x : v.getOutgoingEdges()) {
       Vertex<Integer> ver = x.getTo();
       if (ver.getMarkState() == Graph.VISIT_COLOR_WHITE) {
         if (ver.getData() != 0) ver.setData(v.getData() + 1);
         ver.setParent(v);
         q.add(ver);
       }
     }
     v.setMarkState(Graph.VISIT_COLOR_BLACK);
   }
 }
Exemple #2
0
  public static void main(String[] args) throws IOException {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String[] input = in.readLine().split(" ");
    int n = Integer.parseInt(input[0]);
    int m = Integer.parseInt(input[1]);

    Graph<Integer> g = new Graph<>();
    input = in.readLine().split(" ");
    int[] cats = new int[n + 1];
    for (int i = 1; i <= n; i++) {
      cats[i] = Integer.parseInt(input[i - 1]);
      Vertex<Integer> v = new Vertex<>(Integer.toString(i), cats[i]);
      g.addVertex(v);
    }

    for (int i = 1; i < n; i++) {
      input = in.readLine().split(" ");
      int x = Integer.parseInt(input[0]);
      int y = Integer.parseInt(input[1]);
      Vertex<Integer> from = g.findVertexByName(Integer.toString(x));
      Vertex<Integer> to = g.findVertexByName(Integer.toString(y));
      g.insertBiEdge(from, to, 0);
    }

    BFS_Visit(g.findVertexByName("1"));

    int count = 0;
    for (int i = 1; i <= n; i++) {
      Vertex<Integer> vertex = g.findVertexByName(Integer.toString(i));
      if (vertex.getOutgoingEdgeCount() == 1 && i != 1) {
        int maxi = 0;
        while (vertex.getParent() != null) {
          maxi = Math.max(maxi, vertex.getData());
          // System.out.print(vertex.getName() + " ");
          vertex = vertex.getParent();
        }
        // System.out.println();
        maxi = Math.max(maxi, vertex.getData());
        if (maxi <= m) count++;
      }
    }

    System.out.println(count);
  }