private void assertMinimumsAreEqual(
java.util.PriorityQueue<Integer> oldQueue, PriorityQueue<Integer> newQueue) {
assertThat(oldQueue.isEmpty()).isEqualTo(newQueue.isEmpty());
if (!newQueue.isEmpty()) {
assertThat(oldQueue.peek()).isEqualTo(newQueue.head());
}
}
public static void main(String args[]) throws IOException {
String text = "C:\\Users\\Roshan Rajan\\Desktop\\squaredance.txt";
String gender = "";
PriorityQueue<String> men = new PriorityQueue<String>();
PriorityQueue<String> women = new PriorityQueue<String>();
BufferedReader input = new BufferedReader(new FileReader(text));
String line = null;
while ((line = input.readLine()) != null) {
gender = line.substring(0, 1);
if (gender.equals("M")) men.add(line.substring(2));
else women.add(line.substring(2));
}
input.close();
while (!men.isEmpty() && !women.isEmpty()) {
System.out.println("The couples are ");
System.out.println(men.poll() + " is Dancing with " + women.poll());
}
if (men.isEmpty()) {
System.out.println(women.size() + " girls are Waiting to Dance");
System.out.println(women.peek() + " is the first one waiting");
}
if (women.isEmpty()) {
System.out.println(men.size() + " guys are Waiting to Dance");
System.out.println(men.peek() + " is the first one waiting");
}
}
@Override
void solve(Set<? extends Job> jobs) {
Job[] sortedJobs = jobs.toArray(new Job[jobs.size()]);
Arrays.sort(sortedJobs, Job::compareArrivalTime);
processTime = totWT = 0;
long usefulTime = 0;
int jobCount = jobs.size();
PriorityQueue<Job> queue = new PriorityQueue<>(Job::compareBurstTime);
for (Job job : sortedJobs) {
if (job == null) {
jobCount--;
continue;
}
while (!queue.isEmpty() && processTime < job.getArrivalTime()) {
Job nextJob = queue.poll();
long arrivalTime = nextJob.getArrivalTime();
long burstTime = nextJob.getBurstTime();
if (processTime < nextJob.getArrivalTime()) {
processList.add(new RunningProcess("Idle", arrivalTime - processTime));
processTime = arrivalTime;
}
processList.add(new RunningProcess("P" + nextJob.getId(), burstTime));
usefulTime += burstTime;
totWT += processTime - arrivalTime;
processTime += burstTime;
}
queue.add(job);
}
while (!queue.isEmpty()) {
Job nextJob = queue.poll();
long arrivalTime = nextJob.getArrivalTime();
long burstTime = nextJob.getBurstTime();
if (processTime < nextJob.getArrivalTime()) {
processList.add(new RunningProcess("Idle", arrivalTime - processTime));
processTime = arrivalTime;
}
processList.add(new RunningProcess("P" + nextJob.getId(), burstTime));
usefulTime += burstTime;
totWT += processTime - arrivalTime;
processTime += burstTime;
}
totRT = totWT;
totTAT = totWT + usefulTime;
avgRT = avgWT = (double) totWT / (double) jobCount;
avgTAT = (double) totTAT / (double) jobCount;
utilization = usefulTime * 100.0 / processTime;
}
/*
* As per [S. Koenig,2002] except for two main modifications:
* 1. We stop planning after a number of steps, 'maxsteps' we do this
* because this algorithm can plan forever if the start is surrounded by obstacles
* 2. We lazily remove states from the open list so we never have to iterate through it.
*/
private int computeShortestPath() {
LinkedList<State> s = new LinkedList<State>();
if (openList.isEmpty()) return 1;
int k = 0;
while ((!openList.isEmpty()) && (openList.peek().lt(s_start = calculateKey(s_start)))
|| (getRHS(s_start) != getG(s_start))) {
if (k++ > maxSteps) {
System.out.println("At maxsteps");
return -1;
}
State u;
boolean test = (getRHS(s_start) != getG(s_start));
// lazy remove
while (true) {
if (openList.isEmpty()) return 1;
u = openList.poll();
if (!isValid(u)) continue;
if (!(u.lt(s_start)) && (!test)) return 2;
break;
}
openHash.remove(u);
State k_old = new State(u);
if (k_old.lt(calculateKey(u))) { // u is out of date
insert(u);
} else if (getG(u) > getRHS(u)) { // needs update (got better)
setG(u, getRHS(u));
s = getPred(u);
for (State i : s) {
updateVertex(i);
}
} else { // g <= rhs, state has got worse
setG(u, Double.POSITIVE_INFINITY);
s = getPred(u);
for (State i : s) {
updateVertex(i);
}
updateVertex(u);
}
} // while
return 0;
}
public List<Task> mockRunTaks(List<Task> tasks) {
PriorityQueue<Task> taskQueue =
new PriorityQueue<Task>(
new Comparator<Task>() {
@Override
public int compare(Task t1, Task t2) {
return t1.priority - t2.priority;
}
});
List<Task> runOrder = new ArrayList<Task>();
HashMap<Task, Integer> taskIndegrees = new HashMap<Task, Integer>();
for (Task task : tasks) {
taskIndegrees.put(task, task.dependencies.size());
if (task.dependencies.size() == 0) {
taskQueue.offer(task);
}
}
while (!taskQueue.isEmpty()) {
Task curTask = taskQueue.poll();
runOrder.add(curTask);
for (Task task : curTask.dependencies) {
taskIndegrees.put(task, taskIndegrees.get(task) - 1);
if (taskIndegrees.get(task) == 0) taskQueue.offer(task);
}
}
return runOrder;
}
/**
* Get top N elements
*
* @param vec the vec to extract the top elements from
* @param N the number of elements to extract
* @return the indices and the sorted top N elements
*/
private static List<Double> getTopN(INDArray vec, int N) {
ArrayComparator comparator = new ArrayComparator();
PriorityQueue<Double[]> queue = new PriorityQueue<>(vec.rows(), comparator);
for (int j = 0; j < vec.length(); j++) {
final Double[] pair = new Double[] {vec.getDouble(j), (double) j};
if (queue.size() < N) {
queue.add(pair);
} else {
Double[] head = queue.peek();
if (comparator.compare(pair, head) > 0) {
queue.poll();
queue.add(pair);
}
}
}
List<Double> lowToHighSimLst = new ArrayList<>();
while (!queue.isEmpty()) {
double ind = queue.poll()[1];
lowToHighSimLst.add(ind);
}
return Lists.reverse(lowToHighSimLst);
}
public static SearchResult generic(SearchProblem prob, Comparator<SearchNode> cmp) {
PriorityQueue<SearchNode> frontier = new PriorityQueue<SearchNode>(10000, cmp);
frontier.offer(prob.startNode());
Set<State> explored = new HashSet<State>();
while (!frontier.isEmpty()) {
SearchNode candidate = frontier.poll();
if (candidate.isGoal()) {
return new SearchResult(candidate, explored.size(), frontier.size());
}
List<Action> nextActions = prob.actions(candidate.state);
for (Action action : nextActions) {
SearchNode child = prob.childNode(candidate, action);
if (!explored.contains(child.state)) {
frontier.offer(child);
explored.add(candidate.state);
}
}
}
return null;
}
/*
* Initialise Method
* @params start and goal coordinates
*/
public void init(int sX, int sY, int gX, int gY) {
cellHash.clear();
path.clear();
openHash.clear();
while (!openList.isEmpty()) openList.poll();
k_m = 0;
s_start.x = sX;
s_start.y = sY;
s_goal.x = gX;
s_goal.y = gY;
CellInfo tmp = new CellInfo();
tmp.g = 0;
tmp.rhs = 0;
tmp.cost = C1;
cellHash.put(s_goal, tmp);
tmp = new CellInfo();
tmp.g = tmp.rhs = heuristic(s_start, s_goal);
tmp.cost = C1;
cellHash.put(s_start, tmp);
s_start = calculateKey(s_start);
s_last = s_start;
}
/**
* piirtää reitin tiedostoon ja reittikartta taulukkoon
*
* @param käydytsolmut
* @throws IOException
*/
public void piirräreitti(PriorityQueue<Solmu> käydytsolmut) throws IOException {
String nimi = new String("uk");
BufferedWriter reittikarttatiedosto = new BufferedWriter(new FileWriter("uk"));
Solmu solmu = new Solmu(0, 0, null, 0);
while (!käydytsolmut.isEmpty()) {
solmu = käydytsolmut.poll();
for (int n = 0; n < kartankoko; n++) {
for (int i = 0; i < kartankoko; i++) {
if (solmu.x == n && solmu.y == i) {
// reittikartta[i][n] = '-';
reittikartta[i][n] = (char) (solmu.summaamatkat(0, solmu.annavanhempi()) + 65);
// reittikarttatiedosto.write("-");
reittikarttatiedosto.write('-');
} else {
reittikarttatiedosto.write(reittikartta[i][n]);
}
}
reittikarttatiedosto.newLine();
}
}
reittikarttatiedosto.close();
tulostakartta(reittikartta);
}
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
PriorityQueue<Node> pq = new PriorityQueue<Node>();
HashSet<Integer> visited = new HashSet<Integer>();
int n = in.nextInt();
int[][] am = new int[n][n];
for (int i = 0; i < n; i++)
for (int j = 0; j < n; j++) {
am[i][j] = in.nextInt();
if (i == j) am[i][j] = Integer.MAX_VALUE;
}
n = in.nextInt();
int a, b;
while (n-- > 0) {
a = in.nextInt() - 1;
b = in.nextInt() - 1;
am[a][b] = 0;
am[b][a] = 0;
}
int ret = 0;
pq.add(new Node(0, 0));
Node curr;
while (!pq.isEmpty()) {
curr = pq.poll();
if (visited.contains(curr.a)) continue;
ret += curr.w;
visited.add(curr.a);
for (int i = 0; i < am.length; i++) {
pq.add(new Node(i, am[curr.a][i]));
}
}
System.out.println(ret);
}
static void test00() {
Aron.beg();
PriorityQueue<Interval> queue = new PriorityQueue<Interval>();
Stack<Interval> stack = new Stack<Interval>();
int[] arr1 = {4, 1, 2, 6, 9};
int[] arr2 = {5, 1, 4, 9, 10};
for (int i = 0; i < arr1.length; i++) {
queue.add(new Interval(arr1[i], arr2[i]));
}
if (queue.size() > 0) {
stack.push(queue.remove());
}
while (!queue.isEmpty()) {
Interval top = stack.peek();
Interval inter = queue.remove();
if (top.end < inter.begin) stack.push(inter);
else {
stack.peek().end = Math.max(stack.peek().end, inter.end);
}
}
while (!stack.empty()) {
System.out.println("[" + stack.peek().begin + " " + stack.peek().end + "]");
stack.pop();
}
Aron.end();
}
/**
* This method is used for the UI to display the list of movies in priority order.
*
* @pre
* @post the movies will be in the order of the priority the user queued them in, if two movies
* have the same priority then they appear in FIFO order
* @return an array of {@link Movie} objects that are in priority order
*/
public Movie[] displayWaitingMoviesByPriority() {
@SuppressWarnings("unchecked")
PriorityQueue<Movie> cloneOfP = (PriorityQueue<Movie>) DeepCopier.copy(waitingQueue);
Movie[] movieList = new Movie[cloneOfP.getSize()];
int i = 0;
while (!cloneOfP.isEmpty()) {
movieList[i] = cloneOfP.dequeueByPriority();
i++;
}
return movieList;
}
public static void main(String[] args) {
PriorityQueue<String> pque = new PriorityQueue<>();
System.out.println("Empty? " + pque.isEmpty());
pque.insert(0, "Mark");
System.out.println("Empty? " + pque.isEmpty());
System.out.println("Get min: " + pque.min());
System.out.println("Remove min: " + pque.removeMin());
pque.insert(6, "Hans");
pque.insert(3, "Ib");
pque.insert(6, "Jens");
pque.insert(4, "Mads");
pque.insert(6, "Lene");
pque.insert(2, "Finn");
System.out.println(pque);
System.out.println(pque.size());
System.out.println(pque.removeMin());
System.out.println(pque);
System.out.println(pque.removeMin());
System.out.println(pque.removeMin());
System.out.println(pque.removeMin());
System.out.println(pque.removeMin());
System.out.println(pque.isEmpty());
System.out.println(pque.removeMin());
System.out.println(pque.isEmpty());
try {
System.out.println(pque.removeMin());
} catch (NoSuchElementException e) {
System.out.print("Got it.");
}
try {
System.out.println(pque.min());
} catch (NoSuchElementException e) {
System.out.print("... Got it again.");
}
System.out.println(", size: " + pque.size());
pque.insert(-1, "neg kasper");
pque.insert(500, "stor kasper");
System.out.println(pque);
}
static void sweep(ArrayList<Integer> indexes) {
PriorityQueue<Event> pq = new PriorityQueue<Event>();
for (int i = 0; i < indexes.size(); i++) {
pq.offer(new Event(lo[val[indexes.get(i)]] + 1, 1, indexes.get(i)));
pq.offer(new Event(hi[val[indexes.get(i)]], -1, indexes.get(i)));
}
TreeSet<Integer> active = new TreeSet<Integer>();
while (!pq.isEmpty()) {
Event curr = pq.poll();
if (curr.type == 1) active.add(curr.index);
else if (curr.type == -1) {
active.remove(curr.index);
Integer lower = active.lower(curr.index);
if (lower != null && lower > lo[val[curr.index]]) {
Interval add = new Interval(lower, curr.index);
Interval prev = intervals.floor(add);
Interval next = intervals.ceiling(add);
boolean intersectPrev = true;
boolean intersectNext = true;
if (prev != null) {
if (Math.max(add.l, prev.l) < Math.min(add.r, prev.r)) {
if (add.r - add.l <= prev.r - prev.l) {
intervals.remove(prev);
intersectPrev = false;
}
} else {
intersectPrev = false;
}
} else {
intersectPrev = false;
}
if (next != null) {
if (Math.max(add.l, next.l) < Math.min(add.r, next.r)) {
if (add.r - add.l <= next.r - next.l) {
intervals.remove(next);
intersectNext = false;
}
} else {
intersectNext = false;
}
} else {
intersectNext = false;
}
if (!intersectPrev && !intersectNext) intervals.add(add);
}
}
}
}
public static void main(String[] args) {
PriorityQueue<GregorianCalendar> pq =
new PriorityQueue<GregorianCalendar>(); // 优先级队列对GC设置优先级：月->日
pq.add(new GregorianCalendar(1906, Calendar.DECEMBER, 9)); // G. Hopper
pq.add(new GregorianCalendar(1815, Calendar.DECEMBER, 10)); // A. Lovelace
pq.add(new GregorianCalendar(1923, Calendar.DECEMBER, 3)); // J. von Neumann
pq.add(new GregorianCalendar(1910, Calendar.JUNE, 22)); // K. Zuse
System.out.println("Iterating over elements...");
for (GregorianCalendar date : pq) System.out.println(date.get(Calendar.YEAR));
System.out.println("Removing elements...");
while (!pq.isEmpty()) System.out.println(pq.remove().get(Calendar.YEAR));
}
public void testPriorityQueueAscending() {
PriorityQueue pq = new PriorityQueue();
try {
pq.dequeue();
fail("NoSuchElementException not thrown on empty queue");
} catch (NoSuchElementException e) {
}
pq.enqueue("Test 2", 2);
pq.enqueue("Test 3", 3);
pq.enqueue("Test 1", 1);
assertTrue("isEmpty is returned true on an nonempty queue", !pq.isEmpty());
String peek1 = (String) pq.peek();
String s1 = (String) pq.dequeue();
String peek2 = (String) pq.peek();
String s2 = (String) pq.dequeue();
String s3 = (String) pq.dequeue();
assertTrue("size was incorrect (should be 3)", pq.size() != 3);
assertTrue("isEmpty is returned false on an empty queue", pq.isEmpty());
try {
pq.dequeue();
fail("NoSuchElementException not thrown on empty queue");
} catch (NoSuchElementException e) {
}
assertTrue("Peek #1 incorrect", peek1.equals("Test 1"));
assertTrue("Peek #2 incorrect", peek2.equals("Test 2"));
assertTrue("Dequeue #1 incorrect", s1.equals("Test 1"));
assertTrue("Dequeue #2 incorrect", s2.equals("Test 2"));
assertTrue("Dequeue #3 incorrect", s3.equals("Test 3"));
}
public void getIndexInfo(String indexdir, int freqThreshold) {
IndexReader reader = null;
try {
Directory dir = FSDirectory.open(new File(indexdir));
System.out.println(dir);
reader = IndexReader.open(dir);
System.out.println("document num:" + reader.numDocs());
System.out.println("======================");
TermEnum terms = reader.terms();
sortedTermQueue.clear();
maxDocNum = reader.maxDoc();
linkMap.clear();
termList.clear();
while (terms.next()) {
// System.out.print(terms.term() + "\tDocFreq:" +
TermDocs termDocs = reader.termDocs(terms.term());
MyTerm temp = new MyTerm(terms.term(), termDocs, maxDocNum);
if (temp.totalFreq < freqThreshold) {
continue;
} /*
* if(temp.originTrem.text().length()==1){ continue; }
*/
linkMap.put(temp.originTrem.text(), temp);
sortedTermQueue.add(temp);
termList.add(temp);
}
System.out.println("total Size:" + sortedTermQueue.size());
System.out.println("mapsize:" + linkMap.keySet().size());
// System.exit(0);
int num = 0;
this.maxFreq = sortedTermQueue.peek().totalFreq;
while (!sortedTermQueue.isEmpty()) {
num++;
System.out.println(num + ":" + sortedTermQueue.poll());
}
System.out.println("read index info done");
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/*
* 获取客户极坐标的排序
*
* */
public Queue<Client> sortClientsByPolarCoordinate(Client[] clients) {
Queue<Client> queue = new LinkedList<Client>();
ClientPolarCoordinateComparator clientPolarCoordinateComparator =
new ClientPolarCoordinateComparator();
PriorityQueue<Client> priorityQueue =
new PriorityQueue<Client>(clients.length - 1, clientPolarCoordinateComparator);
for (int i = 1; i < clients.length; i++) {
priorityQueue.add(clients[i]);
}
while (!priorityQueue.isEmpty()) {
queue.add(priorityQueue.remove());
}
return queue;
}
// You can add extra function if needed
// --------------------------------------------
int dijkstra() {
IntegerPair current;
while (!q.isEmpty()) {
current = q.poll();
if (weights.get(current.first()) == current.second())
for (IntegerPair next : AdjList.get(current.first())) {
if (weights.get(next.first()) > current.second() + next.second()) {
weights.set(next.first(), current.second() + next.second());
q.offer(new IntegerPair(next.first(), weights.get(next.first())));
}
}
}
return weights.get(1);
}
private void advance() {
nextAlignment = null;
Row nextRow = null;
while (nextAlignment == null && !rows.isEmpty()) {
while ((nextRow = rows.poll()) != null) {
if (nextRow.hasNext()) {
nextAlignment = nextRow.nextAlignment();
break;
}
}
}
if (nextRow != null && nextAlignment != null) {
rows.add(nextRow);
}
}
public int nthUglyNumber(int n) {
if (n <= 0) return 0;
PriorityQueue<Long> queue = new PriorityQueue<>();
queue.add(1l);
long result = 0;
for (int i = 1; i <= n; i++) {
result = queue.poll();
while (!queue.isEmpty() && queue.peek() == result) queue.poll();
queue.add(result * 2);
queue.add(result * 3);
queue.add(result * 5);
}
return (int) result;
}
// returns the single move to make given a board, depth, piecelist, heuristic
// whill choose the best terminal board at the max depth,
// or if none exists, the best board with no children (inevitable death)
public Board.Direction nextMove(Board start, List<Integer> nextPiece) {
int maxDepth = Math.min(exploreDepth, nextPiece.size());
double bestLiveScore = -1;
Board.Direction bestLiveDirection = null; // cus why not?
// add the first round seperately so we know which move to return
for (Board.Direction d : Board.Direction.values()) {
Board next = start.move(d, nextPiece.get(0));
if (next != null) {
PriorityQueue<Double> pq = new PriorityQueue<Double>();
Deque<StackItem> stack = new ArrayDeque<StackItem>();
stack.push(new StackItem(next, 1, d));
// DFS
while (!stack.isEmpty()) {
StackItem cur = stack.pop();
// add more moves if not beyond max depth
if (cur.d < maxDepth) {
for (Board.Direction d2 : Board.Direction.values()) {
Board next2 = cur.b.move(d2, nextPiece.get(cur.d));
if (next2 != null) {
stack.push(new StackItem(next2, cur.d + 1, cur.move));
}
}
}
// update live only at the bottom of the tree
if (cur.d == maxDepth) {
pq.add(heuristic.useHeuristic(cur.b));
if (pq.size() > 10) pq.poll();
}
}
double sum = 0;
int count = 0;
count = pq.size();
while (!pq.isEmpty()) sum += pq.poll();
if (count > 0 && sum / count > bestLiveScore) {
bestLiveScore = sum / count;
bestLiveDirection = d;
}
}
}
return bestLiveDirection;
}
public List<int[]> getSkyline(int[][] buildings) {
List<int[]> result = new ArrayList<>();
if (buildings == null || buildings.length == 0) {
return result;
}
Comparator<Point> comp =
new Comparator<Point>() {
@Override
public int compare(Point a, Point b) {
if (a.x != b.x) {
return a.x - b.x;
} else {
return a.y - b.y;
}
}
};
PriorityQueue<Point> pq = new PriorityQueue<>(5, comp);
for (int[] data : buildings) {
pq.add(new Point(data[0], -data[2]));
pq.add(new Point(data[1], data[2]));
}
TreeMap<Integer, Integer> map = new TreeMap<>();
map.put(0, 1);
int max = 0;
while (!pq.isEmpty()) {
Point cur = pq.poll();
if (cur.y < 0) {
if (!map.containsKey(-cur.y)) {
map.put(-cur.y, 0);
}
map.put(-cur.y, map.get(-cur.y) + 1);
} else {
map.put(cur.y, map.get(cur.y) - 1);
if (map.get(cur.y) == 0) {
map.remove(cur.y);
}
}
int curMax = map.lastEntry().getKey();
if (curMax != max) {
result.add(new int[] {cur.x, curMax});
max = curMax;
}
}
return result;
}
public LazyPrimMST(EdgeWeightedGraph G) {
pq = new PriorityQueue<>(Collections.reverseOrder());
marked = new boolean[G.V()];
mst = new LinkedList<>();
visit(G, 0);
while (!pq.isEmpty()) {
Edge e = pq.poll();
int v = e.either();
int w = e.other(v);
if (marked[v] && marked[w]) continue;
mst.offer(e);
if (!marked[v]) visit(G, v);
if (!marked[w]) visit(G, w);
}
}
public boolean resolve(LinkedList<Clause> clauses) {
// Storing onto the stack to verify clauses in reverse order
// LinkedList<Clause> expansionStack = new LinkedList<Clause>();
PriorityQueue<Clause> expansionQueue =
new PriorityQueue<Clause>(10000, new ClauseSizeComparator());
for (int count = 0; count < clauses.size(); count++) {
expansionQueue.add(clauses.get(count));
}
while (!expansionQueue.isEmpty()) // Until the stack is empty
{
Clause lastClause = expansionQueue.poll();
for (int clauseCount = 0; clauseCount < lastClause.getClauseID() - 1; clauseCount++) {
// If any new clauses are added since last execution
// if(!clauses.getLast().equals(lastClause))
{
// break;
}
Clause tempClause = clauses.get(clauseCount);
int numClausesBeforeExpansion = clauses.size();
boolean result = lastClause.resolution(tempClause, clauses);
if (!result) {
return false;
}
int numClausesAfterExpansion = clauses.size();
// System.out.println(numClausesAfterExpansion - numClausesBeforeExpansion); //Size does not
// change
// If new clauses are added, expand the newly added clause before expanding any other clause
if (numClausesAfterExpansion - numClausesBeforeExpansion > 0) {
expansionQueue.add(clauses.getLast());
}
}
}
return true;
}
/*
* This is somewhat of a hack, to change the position of the goal we
* first save all of the non-empty nodes on the map, clear the map, move the
* goal and add re-add all of the non-empty cells. Since most of these cells
* are not between the start and goal this does not seem to hurt performance
* too much. Also, it frees up a good deal of memory we are probably not
* going to use.
*/
public void updateGoal(int x, int y) {
List<Pair<ipoint2, Double>> toAdd = new ArrayList<Pair<ipoint2, Double>>();
Pair<ipoint2, Double> tempPoint;
for (Map.Entry<State, CellInfo> entry : cellHash.entrySet()) {
if (!close(entry.getValue().cost, C1)) {
tempPoint =
new Pair(new ipoint2(entry.getKey().x, entry.getKey().y), entry.getValue().cost);
toAdd.add(tempPoint);
}
}
cellHash.clear();
openHash.clear();
while (!openList.isEmpty()) openList.poll();
k_m = 0;
s_goal.x = x;
s_goal.y = y;
CellInfo tmp = new CellInfo();
tmp.g = tmp.rhs = 0;
tmp.cost = C1;
cellHash.put(s_goal, tmp);
tmp = new CellInfo();
tmp.g = tmp.rhs = heuristic(s_start, s_goal);
tmp.cost = C1;
cellHash.put(s_start, tmp);
s_start = calculateKey(s_start);
s_last = s_start;
Iterator<Pair<ipoint2, Double>> iterator = toAdd.iterator();
while (iterator.hasNext()) {
tempPoint = iterator.next();
updateCell(tempPoint.first().x, tempPoint.first().y, tempPoint.second());
}
}
public int astar(Vertex start, Vertex goal, Heuristic h) {
int count;
Collection<Vertex> vertices_;
Comparator<Vertex> comp;
PriorityQueue<Vertex> fringe;
count = 0;
vertices_ = vertices.values();
comp =
new Comparator<Vertex>() {
public int compare(Vertex i, Vertex j) {
return (i.cost + i.estimate - j.cost - j.estimate);
}
}; // use estimates
fringe = new PriorityQueue<Vertex>(20, comp);
for (Vertex v : vertices_) {
v.visited = false;
v.cost = 999999;
}
start.cost = 0;
start.parent = null;
fringe.add(start);
while (!fringe.isEmpty()) {
Vertex v = fringe.remove(); // lowest-cost
count++; // count nodes
if (v.equals(goal)) { // if the goal is found, quit
break;
}
if (!v.visited) {
v.visited = true;
for (Edge e : v.edges) {
int newcost = v.cost + e.cost;
if (newcost < e.target.cost) {
e.target.cost = newcost;
e.target.parent = v;
e.target.estimate = h.fn(e.target, goal); // use heuristic
fringe.add(e.target);
}
}
}
}
return count;
}
public static void computePaths(City source) {
source.minDistance = 0.;
PriorityQueue<City> cityQueue = new PriorityQueue<City>();
cityQueue.add(source);
while (!cityQueue.isEmpty()) {
City u = cityQueue.poll();
// Visit each edge exiting u
for (Route e : u.neighbours) {
City v = e.target;
double weight = e.weight;
double distanceThroughU = u.minDistance + weight;
if (distanceThroughU < v.minDistance) {
cityQueue.remove(v);
v.minDistance = distanceThroughU;
v.previous = u;
cityQueue.add(v);
}
}
}
}
public int dijkstra(Vertex s) {
int count;
Collection<Vertex> vertices_;
Comparator<Vertex> comp;
PriorityQueue<Vertex> fringe;
count = 0;
vertices_ = vertices.values();
comp =
new Comparator<Vertex>() {
public int compare(Vertex i, Vertex j) {
return (i.cost - j.cost);
}
};
fringe = new PriorityQueue<Vertex>(20, comp);
for (Vertex v : vertices_) {
v.visited = false;
v.cost = 999999;
}
s.cost = 0;
s.parent = null;
fringe.add(s);
while (!fringe.isEmpty()) {
Vertex v = fringe.remove(); // lowest-cost
count++; // count nodes
if (!v.visited) {
v.visited = true;
for (Edge e : v.edges) {
int newcost = v.cost + e.cost;
if (newcost < e.target.cost) {
if (e.target.cost < 999999) // target on queue already?
fringe.remove(e.target); // if yes, remove it.
e.target.cost = newcost;
e.target.parent = v;
fringe.add(e.target);
}
}
}
}
return count;
}
static void solve(Scanner sc) throws IOException {
int h = sc.nextInt();
int w = sc.nextInt();
int k = sc.nextInt();
PriorityQueue<Node> pq = new PriorityQueue<Node>();
for (int i = 0; i < h; i++) {
String s = sc.next();
for (int j = 0; j < w; j++) {
grid[i][j] = s.charAt(j);
dis[i][j] = grid[i][j] == '#' ? 0 : inf;
if (grid[i][j] == 'S') pq.offer(new Node(i, j, 0));
}
}
// Dijkstra
// There is always a solution according to problem statement
while (!pq.isEmpty()) {
Node z = pq.poll();
int x = z.x;
int y = z.y;
int d = z.dis;
if (d > dis[x][y]) continue;
if (x == 0 || x == h - 1 || y == 0 || y == w - 1) {
System.out.println(d + 1);
break;
}
for (int i = 0; i < 4; i++) {
int nx = x + dx[i];
int ny = y + dy[i];
// if(nx<0||nx>=h||ny<0||ny>=w)
// continue;
int nd = d + 1 + (grid[nx][ny] == '@' ? k : 0);
if (nd < dis[nx][ny]) {
dis[nx][ny] = nd;
pq.offer(new Node(nx, ny, nd));
}
}
}
}
