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();
}
public static void main(String[] args) throws Exception {
int V, E, s, a, b, w;
File f = new File("in_06.txt");
Scanner sc = new Scanner(f);
V = sc.nextInt();
E = sc.nextInt();
s = 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();
w = sc.nextInt();
AdjList.get(a).add(new IntegerPair(b, w)); // first time using weight
}
// as an example, we start from this source (see Figure 1.15)
Vector<Integer> dist = new Vector<Integer>();
dist.addAll(Collections.nCopies(V, INF));
dist.set(s, 0);
// Bellman Ford routine
for (int i = 0; i < V - 1; i++) // relax all E edges V-1 times, O(V)
for (int u = 0; u < V; u++) { // these two loops = O(E)
Iterator it = AdjList.get(u).iterator();
while (it.hasNext()) { // relax these edges
IntegerPair v = (IntegerPair) it.next();
dist.set(v.first(), Math.min(dist.get(v.first()), dist.get(u) + v.second()));
}
}
boolean negative_cycle_exist = false;
for (int u = 0; u < V; u++) { // one more pass to check
Iterator it = AdjList.get(u).iterator();
while (it.hasNext()) { // relax these edges
IntegerPair v = (IntegerPair) it.next();
if (dist.get(v.first()) > dist.get(u) + v.second()) // should be false, but if possible
negative_cycle_exist = true; // then negative cycle exists!
}
}
System.out.printf("Negative Cycle Exist? %s\n", negative_cycle_exist ? "Yes" : "No");
if (!negative_cycle_exist)
for (int i = 0; i < V; i++) System.out.printf("SSSP(%d, %d) = %d\n", s, i, dist.get(i));
}
Woman ExtractMax() {
Woman maxV = A.get(1);
A.set(1, A.get(BinaryHeapSize));
BinaryHeapSize--; // virtual decrease
shiftDown(1);
return maxV;
}
void shiftUp(int i) {
Woman temp = A.get(i);
Woman temp2;
temp.index = i;
while (i > 1 && A.get(parent(i)).dilation <= A.get(i).dilation) {
if (A.get(parent(i)).dilation == A.get(i).dilation
&& A.get(parent(i)).order < A.get(i).order) {
break;
}
temp = A.get(i);
temp2 = A.get(parent(i));
temp.index = parent(i);
temp2.index = i;
A.set(i, temp2);
A.set(parent(i), temp);
i = parent(i);
}
}
void Update(Woman mother) {
Woman temp;
int i = getNameIndex(mother.name);
temp = A.get(i);
temp.dilation = A.get(i).dilation + mother.dilation;
temp.name = A.get(i).name;
temp.order = A.get(i).order;
A.set(i, temp);
shiftUp(i);
shiftDown(i);
}
void Insert(Woman mother) {
BinaryHeapSize++;
binaryHeapOrder++;
mother.order = binaryHeapOrder;
B.put(mother.name, mother);
if (BinaryHeapSize >= A.size()) {
A.add(mother);
} else {
A.set(BinaryHeapSize, mother);
}
shiftUp(BinaryHeapSize);
}
void Delete(String motherName) {
int i = getNameIndex(motherName);
A.set(i, A.get(BinaryHeapSize));
A.remove(BinaryHeapSize);
B.remove(motherName);
BinaryHeapSize--;
if ((i - 1) != BinaryHeapSize) {
shiftUp(i);
shiftDown(i);
}
}
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);
}
/**
* ************************************************************************ * * Method: performSet
* * Input: CMIRequest theRequest - tokenized LMSSetValue() request * DMErrorManager dmErroMgr -
* Error Manager * Output: none * * Description: This method takes the necessary steps to process
* * an LMSSetValue() request *
* *************************************************************************
*/
public void performSet(CMIRequest theRequest, DMErrorManager dmErrorMgr) {
if (true) {
System.out.println("CMIObjectives::performSet()");
}
// The next token must be an array. If not throw
// an exception for this request.
int index = -1;
// Get the next token off of the request
String token = theRequest.getNextToken();
if (true) {
System.out.println("Token being processed: " + token);
}
// Check to see if next token is an array index. For
// a LMSSetValue() this is true
try {
// Try to convert the token to the index
Integer tmpInt = new Integer(token);
index = tmpInt.intValue();
// Get the Objective Data at position of the index
CMIObjectiveData tmpObj = (CMIObjectiveData) objectives.elementAt(index);
// An objective existed at the given index.
// Invoke the performSet() on the Objective Data
tmpObj.performSet(theRequest, dmErrorMgr);
// replace the old ObjectiveData with the newly set Objective
// Data.
objectives.set(index, tmpObj);
} catch (NumberFormatException nfe) {
if (theRequest.isAKeywordRequest() == true) {
dmErrorMgr.recKeyWordError(token);
} else {
if (true) {
// Invalid parameter passed to LMSSetValue()
System.out.println("Error - Data Model Element not implemented");
System.out.println(
"Invalid data model element: "
+ theRequest.getRequest()
+ " passed to LMSSetValue()");
}
// Notify error manager
dmErrorMgr.recNotImplementedError(theRequest);
}
} catch (ArrayIndexOutOfBoundsException e) {
if (true) {
System.out.println("First time setting the Objective Data");
}
if (index <= objectives.size()) {
// A new Objective Data.
CMIObjectiveData objData = new CMIObjectiveData();
// Invoke performSet() on the new Objective Data
objData.performSet(theRequest, dmErrorMgr);
// Place the Objective data into the vector at the
// index position
objectives.add(index, objData);
} else {
dmErrorMgr.SetCurrentErrorCode("201");
}
}
// Done processing. Let CMIRequest object know the processing
// of the LMSGetValue() is done.
theRequest.done();
return;
} // end of performSet
Vector<Woman> BinaryHeapSort(Woman[] array) {
BuildBinaryHeap(array);
int N = array.length;
for (int i = 1; i <= N; i++) A.set(N - i + 1, ExtractMax());
return A; // ignore the first index 0
}
void shiftDown(int i) {
Woman temp = A.get(i);
Woman temp2;
temp.index = i;
boolean isLeft = true;
boolean isRight = true;
while (i <= BinaryHeapSize) {
isLeft = true;
isRight = true;
int leftMax = 0, leftMaxId = 0;
int rightMax = 0, rightMaxId = 0;
int maxV = A.get(i).dilation, max_id = i;
if (left(i) <= BinaryHeapSize && maxV <= A.get(left(i)).dilation) {
if (maxV == A.get(left(i)).dilation) {
if (A.get(i).order < A.get(left(i)).order) isLeft = false;
}
if (isLeft) {
leftMax = A.get(left(i)).dilation;
leftMaxId = left(i);
}
}
if (right(i) <= BinaryHeapSize && maxV <= A.get(right(i)).dilation) {
if (maxV == A.get(right(i)).dilation) {
if (A.get(i).order < A.get(right(i)).order) isRight = false;
}
if (isRight) {
rightMax = A.get(right(i)).dilation;
rightMaxId = right(i);
}
}
if (rightMax > leftMax) {
maxV = A.get(right(i)).dilation;
max_id = right(i);
} else if (rightMax < leftMax) {
maxV = A.get(left(i)).dilation;
max_id = left(i);
} else if (rightMax == leftMax) {
if (A.get(rightMaxId).order > A.get(leftMaxId).order) {
maxV = A.get(left(i)).dilation;
max_id = left(i);
} else if (A.get(rightMaxId).order < A.get(leftMaxId).order) {
maxV = A.get(right(i)).dilation;
max_id = right(i);
}
}
if (max_id != i) {
temp = A.get(i);
temp2 = A.get(max_id);
temp.index = max_id;
temp2.index = i;
A.set(i, temp2);
A.set(max_id, temp);
i = max_id;
} else break;
}
}
/**
* This method is called when a whole download file has been finished downloading. It updates main
* application window and starts the decoding thread.
*
* @param dlFile The DownloadFile object that is finished
*/
private void handleFinishedDlFile(final DownloadFile dlFile) {
final String filename = dlFile.getFilename();
logger.msg("File downloading finished: " + filename, MyLogger.SEV_INFO);
// notify application that download has finished
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
mainApp.fileDownloadFinished(filename);
mainApp.setProgBarToDecoding(filename, dlFile.getSegCount());
}
});
// create result vector
Vector<byte[]> articleData = new Vector<byte[]>();
Vector<RspHandler> rspHandlers = dlFileRspHandlerMap.get(dlFile);
for (int i = 0; i < rspHandlers.size(); i++) {
byte[] tmpArray = removeFirstLine(rspHandlers.get(i).getData(true));
articleData.add(tmpArray);
rspHandlers.set(i, null); // free some memory
}
// call garbage collector
rspHandlers = null;
dlFileRspHandlerMap.remove(dlFile);
Runtime.getRuntime().gc();
logger.msg(
"First line(s) dump:\n" + HelloNzbToolkit.firstLineFromByteData(articleData.get(0), 2),
MyLogger.SEV_DEBUG);
// determine data encoding (yenc or UU)
String encoding = null;
boolean bHasData = false;
for (int i = 0; i < articleData.size(); i++) {
byte[] abyteHelp = articleData.get(i);
if (abyteHelp.length > 0) {
bHasData = true;
if (bytesEqualsString(abyteHelp, "=ybegin")) {
encoding = "yenc";
break;
} else if (bytesEqualsString(abyteHelp, "begin ")) {
encoding = "uu";
break;
}
}
}
if (encoding == null) {
if (bHasData) {
encoding = "yenc";
logger.msg(
"No suitable decoder (no data) found for downloaded file: "
+ dlFile.getFilename()
+ " -- Assuming yenc.",
MyLogger.SEV_WARNING);
} else {
// too bad, no decoder found for this file :(
logger.msg(
"No suitable decoder found for downloaded file (no data): " + dlFile.getFilename(),
MyLogger.SEV_ERROR);
// update main application window
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
mainApp.fileDecodingFinished(dlFile.getFilename());
}
});
return;
}
}
/*
* // determine data encoding String encoding = null;
* if(bytesEqualsString(articleData.get(0), "=ybegin")) encoding =
* "yenc"; else if(bytesEqualsString(articleData.get(0), "begin "))
* encoding = "uu"; else { // too bad, no decoder found for this file :(
* logger.msg("No suitable decoder found for downloaded file: " +
* dlFile.getFilename(), MyLogger.SEV_ERROR);
*
* // update main application window SwingUtilities.invokeLater(new
* Runnable() { public void run() {
* mainApp.fileDecodingFinished(dlFile.getFilename()); } } );
*
* return; }
*/
// start data decoding background thread
FileDecoder fileDecoder = new FileDecoder(mainApp, dlDir, dlFile, articleData, encoding);
Thread t = new Thread(fileDecoder);
t.start();
}
