Java Code Examples for java.util.TreeMap#firstKey()

/**
 * コンストラクタ.
 * @param srcHandler OEntityDocHandler
 * @param targetSetName ターゲット側のEntitySet名
 * @param targetEntityTypeId ターゲット側のEntityTypeID
 */
public NtoNQueryParameter(
        final EntitySetDocHandler srcHandler,
        final String targetSetName,
        final String targetEntityTypeId) {
    String srcSetName = srcHandler.getType();
    String srcId = srcHandler.getId();

    TreeMap<String, String> tm = new TreeMap<String, String>();
    if (srcSetName.equals(UserDataODataProducer.USER_ODATA_NAMESPACE)) {
        tm.put(srcHandler.getEntityTypeId(), srcId);
        tm.put(targetEntityTypeId, "");
    } else {
        tm.put(srcSetName, srcId);
        tm.put(targetSetName, "");
    }
    this.t1 = tm.firstKey();
    this.t2 = tm.lastKey();
    this.k1 = tm.get(t1);
    this.k2 = tm.get(t2);
}
 

/**
 * コンストラクタ.
 * @param srcHandler OEntityDocHandler
 * @param tgtHandler OEntityDocHandler
 */
public LinkDocHandler(final EntitySetDocHandler srcHandler, final EntitySetDocHandler tgtHandler) {
    this.cellId = srcHandler.getCellId();
    this.boxId = srcHandler.getBoxId();
    this.nodeId = srcHandler.getNodeId();
    String srcType = srcHandler.getType();
    String srcId = srcHandler.getId();
    String tgtType = tgtHandler.getType();
    String tgtId = tgtHandler.getId();

    // ES 保存時の一意キー作成
    TreeMap<String, String> tm = new TreeMap<String, String>();
    tm.put(srcType, srcId);
    tm.put(tgtType, tgtId);

    this.ent1Type = tm.firstKey();
    this.ent2Type = tm.lastKey();
    this.ent1Key = tm.get(ent1Type);
    this.ent2Key = tm.get(ent2Type);
    this.id = this.createLinkId();
    long dateTime = new Date().getTime();
    this.published = dateTime;
    this.updated = dateTime;
}
 

private void mergeConnectedSpans(final List<Long[]> spanList, final TreeMap<Long, Point2D> timePointMap) {
    long t0 = timePointMap.firstKey();
    long t1 = timePointMap.lastKey() + cfg.getTailDuration();

    for (final Iterator<Long[]> iter = spanList.iterator(); iter.hasNext();) {
        final Long[] span = iter.next();
        if (t0 > span[0] && t1 < span[1]) {
            // swallowed
            return;
        }

        if (t0 < span[0] && t1 > span[1]) {
            // swallows
            iter.remove();
        } else if (t1 > span[0] && t1 < span[1]) {
            t1 = span[1];
            iter.remove();
        } else if (t0 < span[1] && t0 > span[0]) {
            t0 = span[0];
            iter.remove();
        }
    }

    spanList.add(new Long[]{t0, t1});
}
 

public static void main (String [] args) throws Exception {
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
	int testCaseCount=Integer.parseInt(br.readLine());
	br.readLine(); //empty line
	for (int testCase=0;testCase<testCaseCount;testCase++) {
		TreeMap<Integer,HashMap<String,Integer>> map=new TreeMap<>();
		String s;
		int sCount=0;
		while (true) {
			s=br.readLine();
			if (s!=null && s.length()>0) {
				addToMap(map,s);
				sCount++;
			} else {
				break;
			}
		}
		
		int minLength=map.firstKey();
		int maxLength=map.lastKey();
		TreeSet<String> possibleSol=new TreeSet<>();
		for (String s1 : map.get(minLength).keySet()) for (String s2 : map.get(maxLength).keySet()) {
			possibleSol.add(s1+s2);
			possibleSol.add(s2+s1);
		}
		
		boolean flag=false;
		for (String sol : possibleSol) {
			flag=solutionOK(sol,map,sCount/2);
			if (flag) {
				printSolution(testCase,sol);
				break;
			}
		}

		if (!flag) printSolution(testCase,possibleSol.iterator().next());
	}
}
 

/**
 * Remove the oldest signedPreKey until there are only MAX_NUMBER_OF_STORED_SIGNED_PREKEYS left.
 *
 * @param userDevice our OmemoDevice.
 *
 * @throws IOException if an I/O error occurred.
 */
private void removeOldSignedPreKeys(OmemoDevice userDevice) throws IOException {
    if (OmemoConfiguration.getMaxNumberOfStoredSignedPreKeys() <= 0) {
        return;
    }

    TreeMap<Integer, T_SigPreKey> signedPreKeys = loadOmemoSignedPreKeys(userDevice);

    for (int i = 0; i < signedPreKeys.keySet().size() - OmemoConfiguration.getMaxNumberOfStoredSignedPreKeys(); i++) {
        int keyId = signedPreKeys.firstKey();
        LOGGER.log(Level.INFO, "Remove signedPreKey " + keyId + ".");
        removeOmemoSignedPreKey(userDevice, i);
        signedPreKeys = loadOmemoSignedPreKeys(userDevice);
    }
}
 

/**
 * 検索結果からLinkDocHandlerを生成するコンストラクタ.
 * @param searchHit 検索結果データ
 */
public LinkDocHandler(final DcSearchHit searchHit) {
    this.id = searchHit.getId();

    Map<String, Object> source = searchHit.getSource();
    this.cellId = source.get(KEY_CELL_ID).toString();
    if (source.containsKey(KEY_BOX_ID) && source.get(KEY_BOX_ID) != null) {
        this.boxId = source.get(KEY_BOX_ID).toString();
    }
    if (source.containsKey(KEY_NODE_ID) && source.get(KEY_NODE_ID) != null) {
        this.nodeId = source.get(KEY_NODE_ID).toString();
    }

    // ES 保存時の一意キー作成
    String srcType = source.get(KEY_ENT1_TYPE).toString();
    String srcId = source.get(KEY_ENT1_ID).toString();
    String tgtType = source.get(KEY_ENT2_TYPE).toString();
    String tgtId = source.get(KEY_ENT2_ID).toString();
    TreeMap<String, String> tm = new TreeMap<String, String>();
    tm.put(srcType, srcId);
    tm.put(tgtType, tgtId);

    this.ent1Type = tm.firstKey();
    this.ent2Type = tm.lastKey();
    this.ent1Key = tm.get(ent1Type);
    this.ent2Key = tm.get(ent2Type);
    this.published = Long.parseLong(source.get(KEY_PUBLISHED).toString());
    this.updated = Long.parseLong(source.get(KEY_UPDATED).toString());
}
 

private static void testLineIdentifiers(Index index, long startPosition) throws IOException,
		GBrowserException {
	
	//Line identifier must be same regardless of the line position in the request region 
	
	//First line of request region
	Region region;
	region = new Region(startPosition, startPosition + 100, new Chromosome("chr1"));
	TreeMap<IndexKey, String> lineMap = index.getFileLines(region);
	IndexKey id1 = lineMap.firstKey();
	
	//Last line  of request region
	region = new Region(startPosition - 100, startPosition + 1, new Chromosome("chr1"));
	lineMap = index.getFileLines(region);
	IndexKey id2 = lineMap.lastKey();
	
	//In the middle of request region
	region = new Region(startPosition - 100, startPosition + 100, new Chromosome("chr1"));
	lineMap = index.getFileLines(region);
	IndexKey fromKey = new IndexKey(new BpCoord(startPosition, new Chromosome("chr1")), 0);
	IndexKey toKey = new IndexKey(new BpCoord(startPosition, new Chromosome("chr1")), Long.MAX_VALUE);
	SortedMap<IndexKey, String> subMap = lineMap.subMap(fromKey, toKey);		
	IndexKey id3 = subMap.firstKey();
	
	Assert.assertEquals(id1, id2);
	Assert.assertEquals(id2, id3);
}
 

/**
 * Remove a version tag from the map.
 */
public Map.Entry<VersionTag, T> take() {
  if(tombstoneMap.isEmpty()) {
    //if there are no more entries, return null;
    return null;
  } else {
    //Otherwise, look at all of the members and find the tag with the 
    //lowest timestamp.
    long lowestTimestamp = Long.MAX_VALUE;
    TreeMap<VersionTag, T> lowestMap = null;
    for(TreeMap<VersionTag, T> memberMap: tombstoneMap.values()) {
      VersionTag firstTag = memberMap.firstKey();
      long stamp = firstTag.getVersionTimeStamp();
      if(stamp < lowestTimestamp) {
        lowestTimestamp = stamp;
        lowestMap = memberMap;
      }
    }
    if(lowestMap == null) {
      return null;
    }
    //Remove the lowest entry
    Entry<VersionTag, T> result = lowestMap.firstEntry();
    lowestMap.remove(result.getKey());
    if(lowestMap.isEmpty()) {
      //if this is the last entry from a given member,
      //the map for that member
      tombstoneMap.remove(result.getKey().getMemberID());
    }
    
    return result;
  }
}
 

private void trimGpxData(final TreeMap<Long, Point2D> timePointMap, final TrackConfiguration trackConfiguration) {

        final Long trimGpxStart = trackConfiguration.getTrimGpxStart();
        if (trimGpxStart != null && trimGpxStart > 0 && timePointMap.size() > 0) {
            final Long skipToTime = timePointMap.firstKey() + trimGpxStart;
            timePointMap.entrySet().removeIf(e -> e.getKey() < skipToTime);
        }

        final Long trimGpxEnd = trackConfiguration.getTrimGpxEnd();
        if (trimGpxEnd != null && trimGpxEnd > 0 && timePointMap.size() > 0) {
            final Long skipAfterTime = timePointMap.lastKey() - trimGpxEnd;
            timePointMap.entrySet().removeIf(e -> e.getKey() > skipAfterTime);
        }
    }
 

public static void main (String [] args) throws IOException {
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
	String s;
	
	while (!(s=br.readLine()).equals("0")) {
		int N=Integer.parseInt(s);
		long cost=0; //wtf.
		TreeMap<Integer,Integer> map=new TreeMap<>();
		for (int i=0;i<N;i++) {
			StringTokenizer st=new StringTokenizer(br.readLine());
			int k=Integer.parseInt(st.nextToken());
			for (int i2=0;i2<k;i2++) {
				int num=Integer.parseInt(st.nextToken());
				map.put(num,map.getOrDefault(num,0)+1);
			}
			
			int highest=map.lastKey();
			if (map.get(highest)==1) map.remove(highest);
			else map.put(highest,map.get(highest)-1);
			
			int lowest=map.firstKey();
			if (map.get(lowest)==1) map.remove(lowest);
			else map.put(lowest,map.get(lowest)-1);
			
			cost+=(highest-lowest);
		}
		System.out.println(cost);
	}
}
 

private void getMostFrequentOpenUDID() {
	if (mReceivedOpenUDIDs.isEmpty() == false) {
		final TreeMap<String,Integer> sorted_OpenUDIDS = new TreeMap(new ValueComparator());
		sorted_OpenUDIDS.putAll(mReceivedOpenUDIDs);
       
		OpenUDID = sorted_OpenUDIDS.firstKey();
	}
}
 

public static void main(String[] args) {
    TreeMap<Integer, String> treeMap = new TreeMap<>();
    for (int i = 0; i < chars.length; i++) {
        treeMap.put(i, chars[i]);
    }
    System.out.println(treeMap);
    Integer low = treeMap.firstKey();
    Integer high = treeMap.lastKey();
    System.out.println(low);
    System.out.println(high);
    Iterator<Integer> it = treeMap.keySet().iterator();
    for (int i = 0; i <= 6; i++) {
        if (i == 3) {
            low = it.next();
        }
        if (i == 6) {
            high = it.next();
        } else {
            it.next();
        }
    }
    System.out.println(low);
    System.out.println(high);
    System.out.println(treeMap.subMap(low, high));
    System.out.println(treeMap.headMap(high));
    System.out.println(treeMap.tailMap(low));
}
 

/**
 * @return Sorted list of warps with most recent players listed first
 */
public Collection<UUID> listSortedWarps() {
    // Bigger value of time means a more recent login
    TreeMap<Long, UUID> map = new TreeMap<>();
    Iterator<Entry<UUID, Location>> it = warpList.entrySet().iterator();
    while (it.hasNext()) {
        Entry<UUID, Location> en = it.next();
        // Check if the location of the warp still exists, if not, delete it
        if (en.getValue() == null) {
            it.remove();
        } else {
            UUID uuid = en.getKey();
            // If never played, will be zero
            long lastPlayed = plugin.getServer().getOfflinePlayer(uuid).getLastPlayed();
            // This aims to avoid the chance that players logged off at exactly the same time
            if (!map.isEmpty() && map.containsKey(lastPlayed)) {
                lastPlayed = map.firstKey() - 1;
            }
            map.put(lastPlayed, uuid);
        }
    }

    Collection<UUID> result = map.descendingMap().values();
    // Fire event
    WarpListEvent event = new WarpListEvent(plugin, result);
    plugin.getServer().getPluginManager().callEvent(event);
    // Get the result of any changes by listeners
    result = event.getWarps();
    return result;
}
 

/** 
 * get primary jsp filename
 */
public String getPrimaryJspFileName() {
    TreeMap tm = new TreeMap(fsection);
    Object o = tm.firstKey();
    String s = (String)fsection.get(o);
    return s;
}
 

/**
 * 沿环的顺时针找到节点
 *
 * @param map
 * @param key
 * @return
 */
public static String doGetTableName(TreeMap<Long, String> map, String key) {
    final Long hash = alg.hash(key);
    Long target = hash;
    if (!map.containsKey(hash)) {
        target = map.ceilingKey(hash);
        if (target == null && !map.isEmpty()) {
            target = map.firstKey();
        }
    }
    return map.get(target);
}
 

@Override
public void deleteEntriesUsingCachePolicy(int numRowsToDelete) {
    IndexEventHolder indexEventHolder = (IndexEventHolder) stateHolder.getState().getEventHolder();
    if (numRowsToDelete >= indexEventHolder.size()) {
        indexEventHolder.deleteAll();
    } else {
        Set<Object> keys = indexEventHolder.getAllPrimaryKeyValues();
        TreeMap<Long, Object> toDelete = new TreeMap<>();
        for (Object key : keys) {
            if (toDelete.size() < numRowsToDelete) {
                toDelete.put((Long) indexEventHolder.getEvent(key).getOutputData()[cachePolicyAttributePosition],
                        key);
            } else {
                Long timestamp = (Long) indexEventHolder.getEvent(key).
                        getOutputData()[cachePolicyAttributePosition];
                Long firstKey = toDelete.firstKey();
                if (timestamp < firstKey) {
                    toDelete.remove(firstKey);
                    toDelete.put(timestamp, key);
                }
            }
        }
        for (Object deleteKey : toDelete.values()) {
            if (deleteKey != null) {
                indexEventHolder.deleteEvent(deleteKey);
            }
        }
    }
}
 

/**
 * 沿环的顺时针找到节点
 *
 * @param map
 * @param key
 * @return
 */
public static String doGetTableName(TreeMap<Long, String> map, String key) {
    final Long hash = alg.hash(key);
    Long target = hash;
    if (!map.containsKey(hash)) {
        target = map.ceilingKey(hash);
        if (target == null && !map.isEmpty()) {
            target = map.firstKey();
        }
    }
    return map.get(target);
}
 

@Test
public void testNewShipCountIsCreated() {
    // Setup expectations
    final ArgumentCaptor<StatisticData> statistics = ArgumentCaptor.forClass(StatisticData.class);
    context.checking(new Expectations() {{
        oneOf(trackingService).registerSubscriber(statistic);
        ignoring(statisticsService).incStatisticStatistics(with(CourseOverGroundStatistic.STATISTIC_NAME), with(any(String.class)));

        oneOf(statisticsRepository).getStatisticData(with(CourseOverGroundStatistic.STATISTIC_NAME), (Long) with(track.getProperty(Track.CELL_ID)));
        oneOf(statisticsRepository).putStatisticData(with(CourseOverGroundStatistic.STATISTIC_NAME), (Long) with(track.getProperty(Track.CELL_ID)), with(statistics.getMatcher()));
    }});

    // Execute
    statistic.start();
    statistic.onCellIdChanged(event);

    // Main assertations
    CourseOverGroundStatisticData capturedStatisticData = (CourseOverGroundStatisticData) statistics.getCapturedObject();

    context.assertIsSatisfied();

    TreeMap<Integer, TreeMap<Integer, TreeMap<Integer, HashMap<String, Integer>>>> data = capturedStatisticData.getData();

    assertEquals(1, data.size()); // Assert one statistic recorded
    int shipTypeBucket = data.firstKey();
    assertEquals(3, shipTypeBucket);
    int shipSizeBucket = data.get(shipTypeBucket).firstKey();
    assertEquals(3, shipSizeBucket);
    int cogBucket = data.get(shipTypeBucket).get(shipSizeBucket).firstKey();
    assertEquals(7, cogBucket);

    int numberOfStats = data.get(shipTypeBucket).get(shipSizeBucket).get(cogBucket).size();
    assertEquals(1, numberOfStats);
    String statName = data.get(shipTypeBucket).get(shipSizeBucket).get(cogBucket).keySet().iterator().next();
    Object statValue = data.get(shipTypeBucket).get(shipSizeBucket).get(cogBucket).get(statName);
    assertEquals(Integer.class, statValue.getClass());
    assertEquals(1, statValue);

    // Other assertations now we're here
    assertEquals(CourseOverGroundStatisticData.class, statistics.getCapturedObject().getClass());
    assertEquals("type", capturedStatisticData.getMeaningOfKey1());
    assertEquals("size", capturedStatisticData.getMeaningOfKey2());
    assertEquals(TreeMap.class, statistics.getCapturedObject().getData().getClass());
    assertEquals(CourseOverGroundStatisticData.STAT_SHIP_COUNT, statName);
}
 

@Test
public void testExistingShipCountIsUpdated() {
    final CourseOverGroundStatisticData existingStatisticData = CourseOverGroundStatisticData.create();
    existingStatisticData.setValue(3-1, 3-1, 7-1, CourseOverGroundStatisticData.STAT_SHIP_COUNT, 1);

    final ArgumentCaptor<StatisticData> statistics1 = ArgumentCaptor.forClass(StatisticData.class);
    final ArgumentCaptor<StatisticData> statistics2 = ArgumentCaptor.forClass(StatisticData.class);
    context.checking(new Expectations() {{
        oneOf(trackingService).registerSubscriber(statistic);
        ignoring(statisticsService).incStatisticStatistics(with(CourseOverGroundStatistic.STATISTIC_NAME), with(any(String.class)));

        oneOf(statisticsRepository).getStatisticData(with(CourseOverGroundStatistic.STATISTIC_NAME), (Long) with(track.getProperty(Track.CELL_ID)));
        will(returnValue(null));
        oneOf(statisticsRepository).putStatisticData(with(CourseOverGroundStatistic.STATISTIC_NAME), (Long) with(track.getProperty(Track.CELL_ID)), with(statistics1.getMatcher()));

        oneOf(statisticsRepository).getStatisticData(with(CourseOverGroundStatistic.STATISTIC_NAME), (Long) with(track.getProperty(Track.CELL_ID)));
        will(returnValue(existingStatisticData));
        oneOf(statisticsRepository).putStatisticData(with(CourseOverGroundStatistic.STATISTIC_NAME), (Long) with(track.getProperty(Track.CELL_ID)), with(statistics2.getMatcher()));
    }});

    // Execute
    statistic.start();
    statistic.onCellIdChanged(event);
    statistic.onCellIdChanged(event);

    // Assert expectations and captured values
    context.assertIsSatisfied();
    // TODO assertEquals(CourseOverGroundStatistic.STATISTIC_NAME, statistics2.getCapturedObject().getStatisticName());
    assertEquals(CourseOverGroundStatisticData.class, statistics2.getCapturedObject().getClass());
    CourseOverGroundStatisticData capturedStatisticData = (CourseOverGroundStatisticData) statistics2.getCapturedObject();
    assertEquals("type", capturedStatisticData.getMeaningOfKey1());
    assertEquals("size", capturedStatisticData.getMeaningOfKey2());
    assertEquals(TreeMap.class, statistics2.getCapturedObject().getData().getClass());
    TreeMap<Integer, TreeMap<Integer, TreeMap<Integer, HashMap<String, Integer>>>> data = capturedStatisticData.getData();
    assertEquals(1, data.size()); // Assert one statistic recorded
    int shipTypeBucket = data.firstKey();
    assertEquals(3, shipTypeBucket);
    int shipSizeBucket = data.get(shipTypeBucket).firstKey();
    assertEquals(3, shipSizeBucket);
    int cogBucket = data.get(shipTypeBucket).get(shipSizeBucket).firstKey();
    assertEquals(7, cogBucket);
    int numberOfStatsForShipTypeAndShipSize = data.get(shipTypeBucket).get(shipSizeBucket).size();
    assertEquals(1, numberOfStatsForShipTypeAndShipSize);
    String statName = data.get(shipTypeBucket).get(shipSizeBucket).get(cogBucket).keySet().iterator().next();
    assertEquals(CourseOverGroundStatisticData.STAT_SHIP_COUNT, statName);
    Object statValue = data.get(shipTypeBucket).get(shipSizeBucket).get(cogBucket).get(statName);
    assertEquals(2, statValue);
}
 

/**
 * Heap. Line Sweep Algorithm.
 * All possible key points are at the edges of rectangle.
 * Add all top-left and top-right corners to a list.
 * Set top-left's height to negative to indicate it's left and put them before right points.
 * Sort the points by x asc, y asc.
 * Create a tree map with 0,1 in it by default.
 * Track the height of previous added key point.
 * Then for each point p in the list:
 * | If p[1] < 0, left point:
 * |   Add the height count to tree map.
 * | If p[1] > 0, right point:
 * |   Reduce the height count to tree map. If count is 1, remove the height.
 * | Get the highest by map.firstKey().
 * | If the highest != previous height, a key point found:
 * |   Add it to result.
 * |   Update previous height to current height.
 * <p>
 * Tricks:
 * 1. Store left points height as negative, then they can be distinguished from right points.
 * 2. Put height 0 count 1 into tree map as a dummy rectangle. 0 is the max height when there is no rectangle.
 * <p>
 * https://briangordon.github.io/2014/08/the-skyline-problem.html
 * <p>
 * My comments:
 * The use of tree map makes me feel a bit unnecessary, since priority queue or heap can contain duplicates.
 * A priority queue or max heap is enough.
 * The only upside is that TreeMap get/put in O(logn). Priority queue removes a specific value in O(n).
 * Because it scans through all values to find the one to remove.
 */
public List<int[]> getSkyline2(int[][] buildings) {
  // Build and sort critical points.
  List<int[]> corners = new ArrayList<>();
  for (int[] b : buildings) {
    corners.add(new int[]{b[0], -b[2]}); // Left point. Set to negative to benefit sorting.
    corners.add(new int[]{b[1], b[2]}); // Right point.
  }
  Collections.sort(corners, (a, b) -> (a[0] == b[0]) ? a[1] - b[1] : a[0] - b[0]);
  // A hash heap. Store height and number of rectangles available. Get max height by calling firstKey().
  TreeMap<Integer, Integer> heights = new TreeMap<>(Collections.reverseOrder()); // Note reverse order, max heap.
  heights.put(0, 1); // Add a dummy rectangle with height 0.
  int prevHeight = 0; // Store previous height for comparison later.
  List<int[]> skyLine = new ArrayList<>();
  for (int[] c : corners) {
    // Update heap according to left/right point.
    if (c[1] < 0) { // Height < 0, left point, add rectangle.
      heights.merge(-c[1], 1, (oldValue, newValue) -> oldValue + newValue);
    } else { // Height > 0, right point, remove rectangle.
      heights.merge(c[1], 1, (oldValue, newValue) -> oldValue.equals(newValue) ? null : oldValue - newValue);
    }
    if (prevHeight != heights.firstKey()) { // If current max height is the same as prevHeight, not a contour.
      skyLine.add(new int[]{c[0], heights.firstKey()});
      prevHeight = heights.firstKey();
    }
  }
  return skyLine;
}