public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
PrintWriter pr = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
StringTokenizer st;
t = Integer.parseInt(br.readLine());
while (t-- > 0) {
st = new StringTokenizer(br.readLine());
n = Integer.parseInt(st.nextToken());
m = Integer.parseInt(st.nextToken());
S = Integer.parseInt(st.nextToken());
T = Integer.parseInt(st.nextToken());
// build graph
AdjList = new Vector<Vector<IntegerPair>>();
for (i = 0; i < n; i++) AdjList.add(new Vector<IntegerPair>());
while (m-- > 0) {
st = new StringTokenizer(br.readLine());
a = Integer.parseInt(st.nextToken());
b = Integer.parseInt(st.nextToken());
w = Integer.parseInt(st.nextToken());
AdjList.get(a).add(new IntegerPair(b, w)); // bidirectional
AdjList.get(b).add(new IntegerPair(a, w));
}
// SPFA from source S
// initially, only S has dist = 0 and in the queue
Vector<Integer> dist = new Vector<Integer>();
for (i = 0; i < n; i++) dist.add(INF);
dist.set(S, 0);
Queue<Integer> q = new LinkedList<Integer>();
q.offer(S);
Vector<Boolean> in_queue = new Vector<Boolean>();
for (i = 0; i < n; i++) in_queue.add(false);
in_queue.set(S, true);
while (!q.isEmpty()) {
int u = q.peek();
q.poll();
in_queue.set(u, false);
for (j = 0; j < AdjList.get(u).size(); j++) { // all outgoing edges from u
int v = AdjList.get(u).get(j).first(), weight_u_v = AdjList.get(u).get(j).second();
if (dist.get(u) + weight_u_v < dist.get(v)) { // if can relax
dist.set(v, dist.get(u) + weight_u_v); // relax
if (!in_queue.get(v)) { // add to the queue only if it's not in the queue
q.offer(v);
in_queue.set(v, true);
}
}
}
}
pr.printf("Case #%d: ", caseNo++);
if (dist.get(T) != INF) pr.printf("%d\n", dist.get(T));
else pr.printf("unreachable\n");
}
pr.close();
}
/**
* The basic method for splitting off a clause of a tree. This modifies the tree in place.
*
* @param tree The tree to split a clause from.
* @param toKeep The edge representing the clause to keep.
*/
static void splitToChildOfEdge(SemanticGraph tree, SemanticGraphEdge toKeep) {
Queue<IndexedWord> fringe = new LinkedList<>();
List<IndexedWord> nodesToRemove = new ArrayList<>();
// Find nodes to remove
// (from the root)
for (IndexedWord root : tree.getRoots()) {
nodesToRemove.add(root);
for (SemanticGraphEdge out : tree.outgoingEdgeIterable(root)) {
if (!out.equals(toKeep)) {
fringe.add(out.getDependent());
}
}
}
// (recursively)
while (!fringe.isEmpty()) {
IndexedWord node = fringe.poll();
nodesToRemove.add(node);
for (SemanticGraphEdge out : tree.outgoingEdgeIterable(node)) {
if (!out.equals(toKeep)) {
fringe.add(out.getDependent());
}
}
}
// Remove nodes
nodesToRemove.forEach(tree::removeVertex);
// Set new root
tree.setRoot(toKeep.getDependent());
}
private static PencilPosition findShortestRoute(int[][] maze) {
// all found solutions to the maze
PriorityQueue<PencilPosition> solutions =
new PriorityQueue<PencilPosition>(5, new PencilPositionComparator());
// bread-first search queue
Queue<PencilPosition> routes = new LinkedList<PencilPosition>();
// set of already visited positions
Set<PencilPosition> visitedPositions = new HashSet<PencilPosition>();
// add the starting positions, which is always (0,0)
routes.add(new PencilPosition(0, 0, false, null));
while (!routes.isEmpty()) {
PencilPosition position = routes.poll();
// if this is the destinations position then we've found a solution
if (0 == maze[position.row][position.column]) {
solutions.add(position);
continue;
}
// if we haven't already visited this position
if (!visitedPositions.contains(position)) {
routes.addAll(findPossibleRoutes(position, maze));
visitedPositions.add(position);
}
}
return solutions.poll();
}
/**
* This method is used to embed syntaxes associated with UDT attribute notations to a queue of
* string tokens extracted from a UDT parameter.
*
* @param tokens Queue of string tokens
* @param syntaxQueue Syntax embedded tokens
* @param isIndex Flag to determine whether a particular string token is an inidex or a column
* name
*/
public static void getSyntaxEmbeddedQueue(
Queue<String> tokens, Queue<String> syntaxQueue, boolean isIndex) {
if (!tokens.isEmpty()) {
if ("[".equals(tokens.peek())) {
isIndex = true;
tokens.poll();
syntaxQueue.add("INEDX_START");
syntaxQueue.add(tokens.poll());
} else if ("]".equals(tokens.peek())) {
isIndex = false;
tokens.poll();
syntaxQueue.add("INDEX_END");
} else if (".".equals(tokens.peek())) {
tokens.poll();
syntaxQueue.add("DOT");
syntaxQueue.add("COLUMN");
syntaxQueue.add(tokens.poll());
} else {
if (isIndex) {
syntaxQueue.add("INDEX");
syntaxQueue.add(tokens.poll());
} else {
syntaxQueue.add("COLUMN");
syntaxQueue.add(tokens.poll());
}
}
getSyntaxEmbeddedQueue(tokens, syntaxQueue, isIndex);
}
}
@Override
public Boolean call() throws Exception {
long timeoutMillis = 5000;
try {
getServersFile();
getZkRunning();
while (true) {
while (!restartQueue.isEmpty()) {
LOG.debug("Restart queue size [" + restartQueue.size() + "]");
RestartHandler handler = restartQueue.poll();
Future<ScriptContext> runner = pool.submit(handler);
ScriptContext scriptContext = runner.get(); // blocking call
if (scriptContext.getExitCode() != 0) restartQueue.add(handler);
}
try {
Thread.sleep(timeoutMillis);
} catch (InterruptedException e) {
}
}
} catch (Exception e) {
e.printStackTrace();
LOG.error(e);
pool.shutdown();
throw e;
}
}
/* Fill the bipartite graph if possible. */
boolean[] solve() {
Map<Integer, List<Integer>> gr = makeGraph();
boolean[] truthTable = new boolean[count];
// keep track of which ones we've visited
boolean[] visited = new boolean[count];
Queue<Integer> queue = new LinkedList<Integer>();
truthTable[0] = true; // assume the first person tells the truth
queue.add(0);
// Breadth first search on graph
while (!queue.isEmpty()) {
int next = queue.remove();
boolean truth = truthTable[next];
List<Integer> list = gr.get(next);
// Go through list and toggle when needed
for (int i = 0; i < list.size(); i++) {
int node = list.get(i);
if (!visited[node]) {
visited[node] = true;
truthTable[node] = !truth;
queue.add(node);
}
}
}
return truthTable;
}
public synchronized void workAllJobs() {
while (!jobs.isEmpty()) {
loadJob(jobs.remove());
}
while (!shadertoset.empty()) {
shadertoset.pop().load();
}
}
public Object readObject() throws EOFException {
synchronized (queue) {
while (queue.isEmpty())
try {
Thread.sleep(250);
} catch (InterruptedException e) {
}
return queue.poll();
}
}
@SuppressWarnings("incomplete-switch")
@Override
public synchronized void run() {
final List<WorldEditorException> errorList = new ArrayList<WorldEditorException>();
int counter = 0;
while (!edits.isEmpty() && counter < 100) {
try {
switch (edits.poll().perform()) {
case SUCCESS:
successes++;
break;
case BLACKLISTED:
blacklistCollisions++;
break;
}
} catch (final WorldEditorException ex) {
errorList.add(ex);
} catch (final Exception ex) {
getLogger().log(Level.WARNING, "[LogBlock WorldEditor] Exeption: ", ex);
}
counter++;
}
if (edits.isEmpty()) {
logblock.getServer().getScheduler().cancelTask(taskID);
if (errorList.size() > 0)
try {
final File file =
new File(
"plugins/LogBlock/error/WorldEditor-"
+ new SimpleDateFormat("yy-MM-dd-HH-mm-ss").format(System.currentTimeMillis())
+ ".log");
file.getParentFile().mkdirs();
final PrintWriter writer = new PrintWriter(file);
for (final LookupCacheElement err : errorList) writer.println(err.getMessage());
writer.close();
} catch (final Exception ex) {
}
errors = errorList.toArray(new WorldEditorException[errorList.size()]);
notify();
}
}
public Object peekObject() throws EOFException {
assert false : "Local match shouldn't have best-of-3 early termination";
synchronized (queue) {
while (queue.isEmpty()) {
try {
Thread.sleep(250);
} catch (InterruptedException e) {
}
}
return queue.peek();
}
}
public void run() {
latch = new CountDownLatch(queue.size());
while (!queue.isEmpty()) {
final LineCounter counter = queue.remove();
new Thread(
new Runnable() {
public void run() {
execute(counter);
latch.countDown();
}
})
.start();
}
waitOnLatch();
}
public void bfs(int s) {
Queue<Integer> q = new Queue<Integer>();
distTo[s] = 0;
marked[s] = true;
q.enqueue(s);
while (!q.isEmpty()) {
int v = q.dequeue();
for (Route r : adj[v]) {
int w = r.other(cities[v]).id() - 1; // index of other city on route
if (!marked[w]) {
edgeTo[w] = r;
distTo[w] = distTo[v] + 1;
marked[w] = true;
q.enqueue(w);
}
}
}
}
/**
* Recursively list all files with a certain extension in a directory.
*
* @param directory The directory to start searching in.
* @param extension Only include files with this extension.
* @return List of files.
*/
public static List<File> listFilesRecursively(final File directory, final String extension) {
if (null == directory) {
throw new IllegalArgumentException("Directory must not be null");
}
List<File> files = new ArrayList();
Queue<File> directories = new LinkedList();
directories.add(directory);
while (!directories.isEmpty()) {
for (File file : directories.poll().listFiles()) {
if (file.isDirectory()) {
directories.add(file);
} else if (file.isFile()) {
if (extension == null || file.getName().endsWith(extension)) {
files.add(file);
}
}
}
}
return files;
}
@Override
public Map<String, Object> getValuesDeep() {
final Tag tag = this.findLastTag(this.path, false);
if (!(tag instanceof CompoundTag)) {
return Collections.emptyMap();
}
final Queue<Node> node =
new ArrayDeque<Node>(
(Collection<? extends Node>) ImmutableList.of((Object) new Node(tag)));
final Map<String, Object> values = (Map<String, Object>) Maps.newHashMap();
while (!node.isEmpty()) {
final Node root = node.poll();
for (final Map.Entry<String, Tag> entry : root.values.entrySet()) {
final String key = this.createRelativeKey(root.parent, entry.getKey());
if (entry.getValue() instanceof CompoundTag) {
node.add(new Node(key, entry.getValue()));
} else {
values.put(key, entry.getValue().getValue());
}
}
}
return values;
}
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);
}
public boolean isEmpty() {
return tokens.isEmpty();
}
public void start() {
if (requests.isEmpty()) return;
coordinator.send(requests.peek());
}
public synchronized void reloadRessources() {
while (!oldjobs.isEmpty()) {
oldjobs.remove().load();
}
}
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");
}
}
@Override
public void emitTuples() {
if (currentWindowId <= idempotentStorageManager.getLargestRecoveryWindow()) {
return;
}
if (inputStream == null) {
try {
if (currentFile != null && offset > 0) {
// open file resets offset to 0 so this a way around it.
int tmpOffset = offset;
if (fs.exists(new Path(currentFile))) {
this.inputStream = openFile(new Path(currentFile));
offset = tmpOffset;
skipCount = tmpOffset;
} else {
currentFile = null;
offset = 0;
skipCount = 0;
}
} else if (!unfinishedFiles.isEmpty()) {
retryFailedFile(unfinishedFiles.poll());
} else if (!pendingFiles.isEmpty()) {
String newPathString = pendingFiles.iterator().next();
pendingFiles.remove(newPathString);
if (fs.exists(new Path(newPathString)))
this.inputStream = openFile(new Path(newPathString));
} else if (!failedFiles.isEmpty()) {
retryFailedFile(failedFiles.poll());
} else {
scanDirectory();
}
} catch (IOException ex) {
failureHandling(ex);
}
}
if (inputStream != null) {
int startOffset = offset;
String file = currentFile; // current file is reset to null when closed.
try {
int counterForTuple = 0;
while (counterForTuple++ < emitBatchSize) {
T line = readEntity();
if (line == null) {
LOG.info("done reading file ({} entries).", offset);
closeFile(inputStream);
break;
}
// If skipCount is non zero, then failed file recovery is going on, skipCount is
// used to prevent already emitted records from being emitted again during recovery.
// When failed file is open, skipCount is set to the last read offset for that file.
//
if (skipCount == 0) {
offset++;
emit(line);
} else {
skipCount--;
}
}
} catch (IOException e) {
failureHandling(e);
}
// Only when something was emitted from the file then we record it for entry.
if (offset > startOffset) {
currentWindowRecoveryState.add(new RecoveryEntry(file, startOffset, offset));
}
}
}
public Token lookAhead() {
if (tokens.isEmpty()) {
return new Token("EOF", Type.unkown);
}
return tokens.peek();
}
public Token getToken() { // rerurn the first Token from the queue
if (tokens.isEmpty()) {
return new Token("EOF", Type.unkown);
}
return tokens.poll();
}
public static void main(String[] args) throws Exception {
/*
// Graph in Figure 4.3, format: list of unweighted edges
// This example shows another form of reading graph input
13 16
0 1 1 2 2 3 0 4 1 5 2 6 3 7 5 6
4 8 8 9 5 10 6 11 7 12 9 10 10 11 11 12
*/
File f = new File("in_04.txt");
Scanner sc = new Scanner(f);
V = sc.nextInt();
E = sc.nextInt();
AdjList.clear();
for (int i = 0; i < V; i++) {
Vector<IntegerPair> Neighbor = new Vector<IntegerPair>();
AdjList.add(Neighbor); // add neighbor list to Adjacency List
}
for (int i = 0; i < E; i++) {
a = sc.nextInt();
b = sc.nextInt();
AdjList.get(a).add(new IntegerPair(b, 0));
AdjList.get(b).add(new IntegerPair(a, 0));
}
// as an example, we start from this source, see Figure 4.3
s = 5;
// BFS routine
// inside void main(String[] args) -- we do not use recursion, thus we do not need to create
// separate function!
Vector<Integer> dist = new Vector<Integer>();
dist.addAll(Collections.nCopies(V, 1000000000));
dist.set(s, 0); // start from source
Queue<Integer> q = new LinkedList<Integer>();
q.offer(s);
p.clear();
p.addAll(
Collections.nCopies(V, -1)); // to store parent information (p must be a global variable!)
int layer = -1; // for our output printing purpose
Boolean isBipartite = true;
while (!q.isEmpty()) {
int u = q.poll(); // queue: layer by layer!
if (dist.get(u) != layer) System.out.printf("\nLayer %d:", dist.get(u));
layer = dist.get(u);
System.out.printf(", visit %d", u);
Iterator it = AdjList.get(u).iterator();
while (it.hasNext()) { // for each neighbours of u
IntegerPair v = (IntegerPair) it.next();
if (dist.get(v.first()) == 1000000000) { // if v not visited before
dist.set(v.first(), dist.get(u) + 1); // then v is reachable from u
q.offer(v.first()); // enqueue v for next steps
p.set(v.first(), u); // parent of v is u
} else if ((dist.get(v.first()) % 2) == (dist.get(u) % 2)) // same parity
isBipartite = false;
}
}
System.out.printf("\nShortest path: ");
printpath(7);
System.out.printf("\n");
System.out.printf("isBipartite? %d\n", isBipartite ? 1 : 0);
}
public synchronized void workJob() {
if (!jobs.isEmpty()) {
loadJob(jobs.remove());
}
}
public void STS() // method to execute an instruction when the current process finishes
{
while (!queue.isEmpty() && (STATE_COMPLETED)) {
CPU.execute(queue.remove());
}
}
/**
* A helper to add an entire subtree to a given dependency tree.
*
* @param toModify The tree to add the subtree to.
* @param root The root of the tree where we should be adding the subtree.
* @param rel The relation to add the subtree with.
* @param originalTree The orignal tree (i.e., {@link ClauseSplitterSearchProblem#tree}).
* @param subject The root of the clause to add.
* @param ignoredEdges The edges to ignore adding when adding this subtree.
*/
private static void addSubtree(
SemanticGraph toModify,
IndexedWord root,
String rel,
SemanticGraph originalTree,
IndexedWord subject,
Collection<SemanticGraphEdge> ignoredEdges) {
if (toModify.containsVertex(subject)) {
return; // This subtree already exists.
}
Queue<IndexedWord> fringe = new LinkedList<>();
Collection<IndexedWord> wordsToAdd = new ArrayList<>();
Collection<SemanticGraphEdge> edgesToAdd = new ArrayList<>();
// Search for subtree to add
for (SemanticGraphEdge edge : originalTree.outgoingEdgeIterable(subject)) {
if (!ignoredEdges.contains(edge)) {
if (toModify.containsVertex(edge.getDependent())) {
// Case: we're adding a subtree that's not disjoint from toModify. This is bad news.
return;
}
edgesToAdd.add(edge);
fringe.add(edge.getDependent());
}
}
while (!fringe.isEmpty()) {
IndexedWord node = fringe.poll();
wordsToAdd.add(node);
for (SemanticGraphEdge edge : originalTree.outgoingEdgeIterable(node)) {
if (!ignoredEdges.contains(edge)) {
if (toModify.containsVertex(edge.getDependent())) {
// Case: we're adding a subtree that's not disjoint from toModify. This is bad news.
return;
}
edgesToAdd.add(edge);
fringe.add(edge.getDependent());
}
}
}
// Add subtree
// (add subject)
toModify.addVertex(subject);
toModify.addEdge(
root,
subject,
GrammaticalRelation.valueOf(Language.English, rel),
Double.NEGATIVE_INFINITY,
false);
// (add nodes)
wordsToAdd.forEach(toModify::addVertex);
// (add edges)
for (SemanticGraphEdge edge : edgesToAdd) {
assert !toModify.incomingEdgeIterator(edge.getDependent()).hasNext();
toModify.addEdge(
edge.getGovernor(),
edge.getDependent(),
edge.getRelation(),
edge.getWeight(),
edge.isExtra());
}
}