Ejemplo n.º 1
0
 public void solve(InputReader in, OutputWriter out) {
   int n = in.nextInt();
   int[][] g = new int[n][n];
   for (int i = 0; i < n; i++) {
     for (int j = 0; j < n; j++) {
       g[i][j] = in.nextInt();
     }
   }
   Queue<int[]> queue =
       new PriorityQueue<int[]>(
           1,
           new Comparator<int[]>() {
             @Override
             public int compare(int[] o1, int[] o2) {
               return o1[1] - o2[1];
             }
           });
   queue.add(new int[] {0, 0});
   boolean[] visited = new boolean[n];
   int res = 0;
   while (!queue.isEmpty()) {
     int[] head = queue.remove();
     int node = head[0];
     int dist = head[1];
     if (!visited[node]) {
       res += dist;
       visited[node] = true;
       for (int i = 0; i < n; i++) {
         if (!visited[i]) {
           queue.add(new int[] {i, g[node][i]});
         }
       }
     }
   }
   out.println(res);
 }
Ejemplo n.º 2
0
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    for (int N = sc.nextInt(); N > 0; N = sc.nextInt()) {
      int M = sc.nextInt();
      int L = sc.nextInt();
      boolean[][] map = new boolean[N][N];
      int[][] D = new int[N][N];
      int[][] E = new int[N][N];
      while (M-- > 0) {
        int A = sc.nextInt() - 1;
        int B = sc.nextInt() - 1;
        map[A][B] = map[B][A] = true;
        D[A][B] = D[B][A] = sc.nextInt();
        E[A][B] = E[B][A] = sc.nextInt();
      }

      boolean[][] visited = new boolean[N][L + 1];
      Queue<Edge> q = new PriorityQueue<Edge>();
      q.offer(new Edge(0, 0, L));
      while (!q.isEmpty()) {
        Edge e = q.poll();
        if (visited[e.to][e.money]) continue;
        visited[e.to][e.money] = true;
        if (e.to == N - 1) {
          System.out.println(e.enemy);
          break;
        }

        for (int i = 0; i < N; i++)
          if (map[e.to][i]) {
            if (D[e.to][i] <= e.money) q.offer(new Edge(e.enemy, i, e.money - D[e.to][i]));
            q.offer(new Edge(e.enemy + E[e.to][i], i, e.money));
          }
      }
    }
  }
Ejemplo n.º 3
0
  public Main() {
    try {
      in = new BufferedReader(new InputStreamReader(System.in));
      // minimum distance from D to K
      int numCities = nextInt();
      int tradeRoutes = nextInt();
      int[][] adjacencyMatrix = new int[numCities][numCities];
      int[] minDistance = new int[numCities];
      Arrays.fill(minDistance, 100000000);
      // Arrays.fill(adjacencyMatrix, -1);

      // int [] pencilCosts = new int[
      Node[] cities = new Node[numCities];
      for (int x = 0; x < tradeRoutes; x++) {
        int cityA = nextInt() - 1;
        int cityB = nextInt() - 1;
        int cost = nextInt();

        if (cities[cityA] == null) cities[cityA] = new Node(cityA);
        if (cities[cityB] == null) cities[cityB] = new Node(cityB);
        adjacencyMatrix[cityA][cityB] = cost;
        adjacencyMatrix[cityB][cityA] = cost;

        // cities[cityA].routes.add(new Edge(cost, cities[cityB]));
        // cities[cityB].routes.add(new Edge(cost, cities[cityA]));
      }

      int numStores = nextInt();
      int[] pencilCosts = new int[numCities];
      Arrays.fill(pencilCosts, -1);
      for (int x = 0; x < numStores; x++) {
        int ID = nextInt() - 1;
        int cost = nextInt();
        pencilCosts[ID] = cost;
      }
      int destination = nextInt() - 1;
      // if (isGood[destination]){

      // }
      int minCost = 100000000;

      Queue<Node> Q = new LinkedList<Node>();
      // PriorityQueue<Node> Q = new PriorityQueue<Node>();
      minDistance[destination] = 0;
      // cities[destination].distance = 0;
      Q.offer(cities[destination]);
      while (!Q.isEmpty()) {
        Node temp = Q.poll();
        for (int x = 0; x < numCities; x++) {
          if (adjacencyMatrix[temp.ID][x] != 0
              && (minDistance[x] == 100000000
                  || minDistance[x] > minDistance[temp.ID] + adjacencyMatrix[temp.ID][x])) {
            minDistance[x] = minDistance[temp.ID] + adjacencyMatrix[temp.ID][x];
            if (pencilCosts[x] != -1 && minDistance[x] < minCost) {
              // System.out.println(minCost);
              minCost = Math.min(minDistance[x] + pencilCosts[x], minCost);
              Q.offer(cities[x]);
            } else {
              if (pencilCosts[x] == -1) { // why>
                Q.offer(cities[x]);
              }
            }
            // Q.offer(temp.routes.get(x).destination);
          }
        }
      }

      for (int x = 0; x < numCities; x++) {
        if (pencilCosts[x] != -1
            && pencilCosts[x] + minDistance[x] < minCost
            && minDistance[x] != 100000000) {
          minCost = minDistance[x] + pencilCosts[x];
        }
      }
      System.out.println(minCost);

    } catch (IOException e) {
      System.out.println("IO: General");
    }
  }