description: It is the hard version of the problem. The only difference is that in this version 1 ≤ n ≤ 300.
  
  In the cinema seats can be represented as the table with n rows and m columns. The rows are numbered with integers from 1 to n. The seats in each row are numbered with consecutive integers from left to right: in the k-th row from m (k - 1) + 1 to m k for all rows 1 ≤ k ≤ n.
  
  1| 2| ⋅⋅⋅| m - 1| m  
  ---|---|---|---|---  
  m + 1| m + 2| ⋅⋅⋅| 2 m - 1| 2 m  
  2m + 1| 2m + 2| ⋅⋅⋅| 3 m - 1| 3 m  
  \vdots| \vdots| \ddots| \vdots| \vdots  
  m (n - 1) + 1| m (n - 1) + 2| ⋅⋅⋅| n m - 1| n m  
  The table with seats indices
  
  There are nm people who want to go to the cinema to watch a new film. They are numbered with integers from 1 to nm. You should give exactly one seat to each person.
  
  It is known, that in this cinema as lower seat index you have as better you can see everything happening on the screen. i-th person has the level of sight a_i. Let's define s_i as the seat index, that will be given to i-th person. You want to give better places for people with lower sight levels, so for any two people i, j such that a_i < a_j it should be satisfied that s_i < s_j.
  
  After you will give seats to all people they will start coming to their seats. In the order from 1 to nm, each person will enter the hall and sit in their seat. To get to their place, the person will go to their seat's row and start moving from the first seat in this row to theirs from left to right. While moving some places will be free, some will be occupied with people already seated. The inconvenience of the person is equal to the number of occupied seats he or she will go through.
  
  Let's consider an example: m = 5, the person has the seat 4 in the first row, the seats 1, 3, 5 in the first row are already occupied, the seats 2 and 4 are free. The inconvenience of this person will be 2, because he will go through occupied seats 1 and 3.
  
  Find the minimal total inconvenience (the sum of inconveniences of all people), that is possible to have by giving places for all people (all conditions should be satisfied).
  
  Input
  
  The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases. Description of the test cases follows.
  
  The first line of each test case contains two integers n and m (1 ≤ n, m ≤ 300) — the number of rows and places in each row respectively.
  
  The second line of each test case contains n ⋅ m integers a_1, a_2, …, a_{n ⋅ m} (1 ≤ a_i ≤ 10^9), where a_i is the sight level of i-th person.
  
  It's guaranteed that the sum of n ⋅ m over all test cases does not exceed 10^5.
  
  Output
  
  For each test case print a single integer — the minimal total inconvenience that can be achieved.
  
  Example
  
  Input
  
  
  7
  1 2
  1 2
  3 2
  1 1 2 2 3 3
  3 3
  3 4 4 1 1 1 1 1 2
  2 2
  1 1 2 1
  4 2
  50 50 50 50 3 50 50 50
  4 2
  6 6 6 6 2 2 9 6
  2 9
  1 3 3 3 3 3 1 1 3 1 3 1 1 3 3 1 1 3
  
  
  Output
  
  
  1
  0
  4
  0
  0
  0
  1
  
  Note
  
  In the first test case, there is a single way to give seats: the first person sits in the first place and the second person — in the second. The total inconvenience is 1.
  
  In the second test case the optimal seating looks like this: 
  
  <image>
  
  In the third test case the optimal seating looks like this: 
  
  <image>
  
  The number in a cell is the person's index that sits on this place.
solution: import java.io.OutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  import java.util.Arrays;
  import java.io.BufferedWriter;
  import java.util.Collection;
  import java.util.InputMismatchException;
  import java.io.IOException;
  import java.util.Random;
  import java.io.Writer;
  import java.io.OutputStreamWriter;
  import java.util.NoSuchElementException;
  import java.io.InputStream;
  
  /**
   * Built using CHelper plug-in
   * Actual solution is at the top
   */
  public class Main {
      public static void main(String[] args) {
          InputStream inputStream = System.in;
          OutputStream outputStream = System.out;
          InputReader in = new InputReader(inputStream);
          OutputWriter out = new OutputWriter(outputStream);
          D2SeatingArrangementsHardVersion solver = new D2SeatingArrangementsHardVersion();
          solver.solve(1, in, out);
          out.close();
      }
  
      static class D2SeatingArrangementsHardVersion {
          public void solve(int testNumber, InputReader in, OutputWriter out) {
              int tc = in.nextInt();
              for (; tc > 0; tc--) {
                  int n = in.nextInt();
                  int m = in.nextInt();
                  int[] sight = in.nextIntArray(n * m);
  
  
                  EzIntTreeSet[] ta = new EzIntTreeSet[n];
                  for (int i = 0; i < n; i++) {
                      EzIntTreeSet t = new EzIntTreeSet(m);
                      for (int j = 0; j < m; j++) {
                          t.add(j);
                      }
                      ta[i] = t;
                  }
  
                  int[] sortedSight = ArrayUtils.clone(sight);
                  Arrays.sort(sortedSight);
  
                  long inconvenience = 0;
                  for (int s : sight) {
                      // put people in the last position they can be in.
                      // this needs to be faster
                      int minLocation = findFirstOccurrence(sortedSight, s);
                      int maxLocation = findLastOccurrence(sortedSight, s);
                      // find all the first non filled column t could be in.
                      int firstTColumn = minLocation / m;
                      int idxInFirstColumn = minLocation % m;
                      int lastTColumn = maxLocation / m;
                      int idxInLastColumn = maxLocation % m;
                      // go through the list of columns trying to find a location, should be m * log(n) time
                      int loc = -1;
                      int row = -1;
                      for (int i = firstTColumn; i <= lastTColumn; i++) {
                          if (i == lastTColumn) {
                              loc = ta[i].floor(idxInLastColumn);
                              if (!ta[i].returnedNull()) {
                                  row = i;
                                  break;
                              }
                          } else if (i == firstTColumn) {
                              loc = ta[i].floor(m);
                              if (!ta[i].returnedNull() && loc >= idxInFirstColumn) {
                                  row = i;
                                  break;
                              }
                          } else {
                              loc = ta[i].floor(m);
                              if (!ta[i].returnedNull()) {
                                  row = i;
                                  break;
                              }
                          }
                      }
  
                      ta[row].remove(loc);
                      for (int i = 0; i < loc; i++) {
                          if (!ta[row].contains(i)) {
                              inconvenience++;
                          }
                      }
                  }
  
                  out.println(inconvenience);
              }
          }
  
          public static int findFirstOccurrence(int[] A, int x) {
              // search space is `A[left…right]`
              int left = 0;
              int right = A.length - 1;
  
              // initialize the result by -1
              int result = -1;
  
              // loop till the search space is exhausted
              while (left <= right) {
                  // find the mid-value in the search space and compares it with the target
                  int mid = (left + right) / 2;
  
                  // if the key is located, update the result and
                  // search towards the left (lower indices)
                  if (x == A[mid]) {
                      result = mid;
                      right = mid - 1;
                  }
  
                  // if the key is less than the middle element, discard the right half
                  else if (x < A[mid]) {
                      right = mid - 1;
                  }
  
                  // if the key is more than the middle element, discard the left half
                  else {
                      left = mid + 1;
                  }
              }
  
              // return the leftmost index, or -1 if the element is not found
              return result;
          }
  
          public static int findLastOccurrence(int[] A, int x) {
              // search space is `A[left…right]`
              int left = 0;
              int right = A.length - 1;
  
              // initialize the result by -1
              int result = -1;
  
              // loop till the search space is exhausted
              while (left <= right) {
                  // find the mid-value in the search space and compares it with the target
                  int mid = (left + right) / 2;
  
                  // if the key is located, update the result and
                  // search towards the right (higher indices)
                  if (x == A[mid]) {
                      result = mid;
                      left = mid + 1;
                  }
  
                  // if the key is less than the middle element, discard the right half
                  else if (x < A[mid]) {
                      right = mid - 1;
                  }
  
                  // if the key is more than the middle element, discard the left half
                  else {
                      left = mid + 1;
                  }
              }
  
              // return the leftmost index, or -1 if the element is not found
              return result;
          }
  
      }
  
      static interface EzIntIterator {
          boolean hasNext();
  
          int next();
  
      }
  
      static class InputReader {
          private InputStream stream;
          private byte[] buf = new byte[1024];
          private int curChar;
          private int numChars;
          private InputReader.SpaceCharFilter filter;
  
          public InputReader(InputStream stream) {
              this.stream = stream;
          }
  
          public int read() {
              if (numChars == -1) {
                  throw new InputMismatchException();
              }
              if (curChar >= numChars) {
                  curChar = 0;
                  try {
                      numChars = stream.read(buf);
                  } catch (IOException e) {
                      throw new InputMismatchException();
                  }
                  if (numChars <= 0) {
                      return -1;
                  }
              }
              return buf[curChar++];
          }
  
          public int nextInt() {
              int c = read();
              while (isSpaceChar(c)) {
                  c = read();
              }
              int sgn = 1;
              if (c == '-') {
                  sgn = -1;
                  c = read();
              }
              int res = 0;
              do {
                  if (c < '0' || c > '9') {
                      throw new InputMismatchException();
                  }
                  res *= 10;
                  res += c - '0';
                  c = read();
              } while (!isSpaceChar(c));
              return res * sgn;
          }
  
          public boolean isSpaceChar(int c) {
              if (filter != null) {
                  return filter.isSpaceChar(c);
              }
              return isWhitespace(c);
          }
  
          public static boolean isWhitespace(int c) {
              return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
          }
  
          public int[] nextIntArray(int n) {
              int[] array = new int[n];
              for (int i = 0; i < n; ++i) array[i] = nextInt();
              return array;
          }
  
          public interface SpaceCharFilter {
              public boolean isSpaceChar(int ch);
  
          }
  
      }
  
      static class EzIntTreeSet implements EzIntSortedSet {
          private static final int DEFAULT_CAPACITY = 10;
          private static final double ENLARGE_SCALE = 2.0;
          private static final int HASHCODE_INITIAL_VALUE = 0x811c9dc5;
          private static final int HASHCODE_MULTIPLIER = 0x01000193;
          private static final boolean BLACK = false;
          private static final boolean RED = true;
          private static final int NULL = 0;
          private static final int DEFAULT_NULL_ELEMENT = -1;
          private int[] key;
          private int[] left;
          private int[] right;
          private int[] p;
          private boolean[] color;
          private int size;
          private int root;
          private boolean returnedNull;
  
          public EzIntTreeSet() {
              this(DEFAULT_CAPACITY);
          }
  
          public EzIntTreeSet(int capacity) {
              if (capacity < 0) {
                  throw new IllegalArgumentException("Capacity must be non-negative");
              }
              capacity++;
              key = new int[capacity];
              left = new int[capacity];
              right = new int[capacity];
              p = new int[capacity];
              color = new boolean[capacity];
              color[NULL] = BLACK;
              size = 0;
              root = NULL;
              returnedNull = false;
          }
  
          public EzIntTreeSet(EzIntCollection collection) {
              this(collection.size());
              for (EzIntIterator iterator = collection.iterator(); iterator.hasNext(); ) {
                  add(iterator.next());
              }
          }
  
          public EzIntTreeSet(int[] srcArray) {
              this(srcArray.length);
              for (int element : srcArray) {
                  add(element);
              }
          }
  
          public EzIntTreeSet(Collection<Integer> javaCollection) {
              this(javaCollection.size());
              for (int element : javaCollection) {
                  add(element);
              }
          }
  
          public int size() {
              return size;
          }
  
          public boolean contains(int element) {
              int x = root;
              while (x != NULL) {
                  if (element < key[x]) {
                      x = left[x];
                  } else if (element > key[x]) {
                      x = right[x];
                  } else {
                      return true;
                  }
              }
              return false;
          }
  
          public EzIntIterator iterator() {
              return new EzIntTreeSetIterator();
          }
  
          public boolean add(int element) {
              int y = NULL;
              int x = root;
              while (x != NULL) {
                  //noinspection SuspiciousNameCombination
                  y = x;
                  if (element < key[x]) {
                      x = left[x];
                  } else if (element > key[x]) {
                      x = right[x];
                  } else {
                      return false;
                  }
              }
              if (size == color.length - 1) {
                  enlarge();
              }
              int z = ++size;
              key[z] = element;
              p[z] = y;
              if (y == NULL) {
                  root = z;
              } else {
                  if (element < key[y]) {
                      left[y] = z;
                  } else {
                      right[y] = z;
                  }
              }
              left[z] = NULL;
              right[z] = NULL;
              color[z] = RED;
              fixAfterAdd(z);
              return true;
          }
  
          public boolean remove(int element) {
              int z = root;
              while (z != NULL) {
                  if (element < key[z]) {
                      z = left[z];
                  } else if (element > key[z]) {
                      z = right[z];
                  } else {
                      removeNode(z);
                      return true;
                  }
              }
              return false;
          }
  
          private void removeNode(int z) {
              int y = (left[z] == NULL || right[z] == NULL) ? z : successorNode(z);
              int x = (left[y] != NULL) ? left[y] : right[y];
              p[x] = p[y];
              if (p[y] == NULL) {
                  root = x;
              } else {
                  if (y == left[p[y]]) {
                      left[p[y]] = x;
                  } else {
                      right[p[y]] = x;
                  }
              }
              if (y != z) {
                  key[z] = key[y];
              }
              //noinspection PointlessBooleanExpression
              if (color[y] == BLACK) {
                  fixAfterRemove(x);
              }
              // Swap with last
              if (y != size) {
                  // copy fields
                  key[y] = key[size];
                  left[y] = left[size];
                  right[y] = right[size];
                  p[y] = p[size];
                  color[y] = color[size];
                  // fix the children's parents
                  p[left[size]] = y;
                  p[right[size]] = y;
                  // fix one of the parent's children
                  if (left[p[size]] == size) {
                      left[p[size]] = y;
                  } else {
                      right[p[size]] = y;
                  }
                  // fix root
                  if (root == size) {
                      root = y;
                  }
              }
              size--;
          }
  
          private int successorNode(int x) {
              if (right[x] != NULL) {
                  x = right[x];
                  while (left[x] != NULL) {
                      x = left[x];
                  }
                  return x;
              } else {
                  int y = p[x];
                  while (y != NULL && x == right[y]) {
                      //noinspection SuspiciousNameCombination
                      x = y;
                      y = p[y];
                  }
                  return y;
              }
          }
  
          private void fixAfterAdd(int z) {
              while (color[p[z]] == RED) {
                  if (p[z] == left[p[p[z]]]) {
                      int y = right[p[p[z]]];
                      if (color[y] == RED) {
                          color[p[z]] = BLACK;
                          color[y] = BLACK;
                          color[p[p[z]]] = RED;
                          z = p[p[z]];
                      } else {
                          if (z == right[p[z]]) {
                              z = p[z];
                              rotateLeft(z);
                          }
                          color[p[z]] = BLACK;
                          color[p[p[z]]] = RED;
                          rotateRight(p[p[z]]);
                      }
                  } else {
                      int y = left[p[p[z]]];
                      if (color[y] == RED) {
                          color[p[z]] = BLACK;
                          color[y] = BLACK;
                          color[p[p[z]]] = RED;
                          z = p[p[z]];
                      } else {
                          if (z == left[p[z]]) {
                              z = p[z];
                              rotateRight(z);
                          }
                          color[p[z]] = BLACK;
                          color[p[p[z]]] = RED;
                          rotateLeft(p[p[z]]);
                      }
                  }
              }
              color[root] = BLACK;
          }
  
          private void fixAfterRemove(int x) {
              while (x != root && color[x] == BLACK) {
                  if (x == left[p[x]]) {
                      int w = right[p[x]];
                      if (color[w] == RED) {
                          color[w] = BLACK;
                          color[p[x]] = RED;
                          rotateLeft(p[x]);
                          w = right[p[x]];
                      }
                      if (color[left[w]] == BLACK && color[right[w]] == BLACK) {
                          color[w] = RED;
                          x = p[x];
                      } else {
                          if (color[right[w]] == BLACK) {
                              color[left[w]] = BLACK;
                              color[w] = RED;
                              rotateRight(w);
                              w = right[p[x]];
                          }
                          color[w] = color[p[x]];
                          color[p[x]] = BLACK;
                          color[right[w]] = BLACK;
                          rotateLeft(p[x]);
                          x = root;
                      }
                  } else {
                      int w = left[p[x]];
                      if (color[w] == RED) {
                          color[w] = BLACK;
                          color[p[x]] = RED;
                          rotateRight(p[x]);
                          w = left[p[x]];
                      }
                      if (color[left[w]] == BLACK && color[right[w]] == BLACK) {
                          color[w] = RED;
                          x = p[x];
                      } else {
                          if (color[left[w]] == BLACK) {
                              color[right[w]] = BLACK;
                              color[w] = RED;
                              rotateLeft(w);
                              w = left[p[x]];
                          }
                          color[w] = color[p[x]];
                          color[p[x]] = BLACK;
                          color[left[w]] = BLACK;
                          rotateRight(p[x]);
                          x = root;
                      }
                  }
              }
              color[x] = BLACK;
          }
  
          private void rotateLeft(int x) {
              int y = right[x];
              right[x] = left[y];
              if (left[y] != NULL) {
                  p[left[y]] = x;
              }
              p[y] = p[x];
              if (p[x] == NULL) {
                  root = y;
              } else {
                  if (x == left[p[x]]) {
                      left[p[x]] = y;
                  } else {
                      right[p[x]] = y;
                  }
              }
              left[y] = x;
              p[x] = y;
          }
  
          private void rotateRight(int x) {
              int y = left[x];
              left[x] = right[y];
              if (right[y] != NULL) {
                  p[right[y]] = x;
              }
              p[y] = p[x];
              if (p[x] == NULL) {
                  root = y;
              } else {
                  if (x == right[p[x]]) {
                      right[p[x]] = y;
                  } else {
                      left[p[x]] = y;
                  }
              }
              right[y] = x;
              p[x] = y;
          }
  
          private void enlarge() {
              int newLength = Math.max(color.length + 1, (int) (color.length * ENLARGE_SCALE));
              key = Arrays.copyOf(key, newLength);
              left = Arrays.copyOf(left, newLength);
              right = Arrays.copyOf(right, newLength);
              p = Arrays.copyOf(p, newLength);
              color = Arrays.copyOf(color, newLength);
          }
  
          private int firstNode() {
              int x = root;
              while (left[x] != NULL) {
                  x = left[x];
              }
              return x;
          }
  
          public int floor(int element) {
              int x = root;
              while (x != NULL) {
                  if (element > key[x]) {
                      if (right[x] != NULL) {
                          x = right[x];
                      } else {
                          returnedNull = false;
                          return key[x];
                      }
                  } else if (element < key[x]) {
                      if (left[x] != NULL) {
                          x = left[x];
                      } else {
                          int y = p[x];
                          while (y != NULL && x == left[y]) {
                              //noinspection SuspiciousNameCombination
                              x = y;
                              y = p[y];
                          }
                          if (y == NULL) {
                              returnedNull = true;
                              return DEFAULT_NULL_ELEMENT;
                          } else {
                              returnedNull = false;
                              return key[y];
                          }
                      }
                  } else {
                      returnedNull = false;
                      return key[x];
                  }
              }
              returnedNull = true;
              return DEFAULT_NULL_ELEMENT;
          }
  
          public boolean returnedNull() {
              return returnedNull;
          }
  
          public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
              EzIntTreeSet that = (EzIntTreeSet) o;
  
              if (size != that.size) {
                  return false;
              }
              for (int x = firstNode(), y = that.firstNode();
                   x != NULL;
                  //noinspection SuspiciousNameCombination
                   x = successorNode(x), y = that.successorNode(y)
              ) {
                  if (key[x] != that.key[y]) {
                      return false;
                  }
              }
              return true;
          }
  
          public int hashCode() {
              int hash = HASHCODE_INITIAL_VALUE;
              for (int x = firstNode(); x != NULL; x = successorNode(x)) {
                  hash = (hash ^ PrimitiveHashCalculator.getHash(key[x])) * HASHCODE_MULTIPLIER;
              }
              return hash;
          }
  
          public String toString() {
              StringBuilder sb = new StringBuilder();
              sb.append('[');
              for (int x = firstNode(); x != NULL; x = successorNode(x)) {
                  if (sb.length() > 1) {
                      sb.append(", ");
                  }
                  sb.append(key[x]);
              }
              sb.append(']');
              return sb.toString();
          }
  
          private class EzIntTreeSetIterator implements EzIntIterator {
              private int x;
  
              private EzIntTreeSetIterator() {
                  x = firstNode();
              }
  
              public boolean hasNext() {
                  return x != NULL;
              }
  
              public int next() {
                  if (x == NULL) {
                      throw new NoSuchElementException("Iterator doesn't have more elements");
                  }
                  final int result = key[x];
                  x = successorNode(x);
                  return result;
              }
  
          }
  
      }
  
      static final class PrimitiveHashCalculator {
          private PrimitiveHashCalculator() {
          }
  
          public static int getHash(int x) {
              return x;
          }
  
      }
  
      static interface EzIntSortedSet extends EzIntSet {
          int size();
  
          EzIntIterator iterator();
  
          boolean equals(Object object);
  
          int hashCode();
  
          String toString();
  
      }
  
      static final class EzIntSort {
          private static final double HEAPSORT_DEPTH_COEFFICIENT = 2.0;
          private static final Random rnd = new Random(System.nanoTime());
  
          private EzIntSort() {
          }
  
          private static int maxQuickSortDepth(int length) {
              if (length <= 1) {
                  return 0;
              }
              int log = Integer.numberOfTrailingZeros(Integer.highestOneBit(length - 1)) + 1;
              return (int) (HEAPSORT_DEPTH_COEFFICIENT * log);
          }
  
          public static void sort(int[] a) {
              quickSort(a, 0, a.length, 0, maxQuickSortDepth(a.length));
          }
  
          private static void quickSort(int[] a, int left, int right, int depth, int maxDepth) {
              if (right - left <= 1) {
                  return;
              }
              if (depth > maxDepth) {
                  heapSort(a, left, right - left);
                  return;
              }
              final int pivot = a[left + rnd.nextInt(right - left)];
              int i = left;
              int j = right - 1;
              do {
                  while (a[i] < pivot) i++;
                  while (pivot < a[j]) j--;
                  if (i <= j) {
                      int tmp = a[i];
                      a[i++] = a[j];
                      a[j--] = tmp;
                  }
              } while (i <= j);
              quickSort(a, left, j + 1, depth + 1, maxDepth);
              quickSort(a, i, right, depth + 1, maxDepth);
          }
  
          private static void heapSort(int[] a, int offset, int size) {
              // If size <= 1, nothing is executed
              for (int i = (size >>> 1) - 1; i >= 0; i--) {
                  down(a, i, offset, size);
              }
              for (int i = size - 1; i > 0; i--) {
                  int tmp = a[offset];
                  a[offset] = a[offset + i];
                  a[offset + i] = tmp;
                  down(a, 0, offset, i);
              }
          }
  
          private static void down(int[] a, int index, int offset, int size) {
              final int element = a[offset + index];
              final int firstLeaf = (size >>> 1);
              while (index < firstLeaf) {
                  int largestChild = (index << 1) + 1;
                  if (largestChild + 1 < size && a[offset + largestChild + 1] > a[offset + largestChild]) {
                      largestChild++;
                  }
                  if (a[offset + largestChild] <= element) {
                      break;
                  }
                  a[offset + index] = a[offset + largestChild];
                  index = largestChild;
              }
              a[offset + index] = element;
          }
  
      }
  
      static interface EzIntCollection {
          int size();
  
          EzIntIterator iterator();
  
          boolean equals(Object object);
  
          int hashCode();
  
          String toString();
  
      }
  
      static class ArrayUtils {
          public static int[] clone(final int[] array) {
              if (array == null) {
                  return null;
              }
              return array.clone();
          }
  
          public ArrayUtils() {
          }
  
      }
  
      static class Arrays {
          private Arrays() {
          }
  
          public static void sort(int[] a) {
              EzIntSort.sort(a);
          }
  
          public static int[] copyOf(int[] original, int newLength) {
              return java.util.Arrays.copyOf(original, newLength);
          }
  
          public static boolean[] copyOf(boolean[] original, int newLength) {
              return java.util.Arrays.copyOf(original, newLength);
  
          }
  
      }
  
      static class OutputWriter {
          private final PrintWriter writer;
  
          public OutputWriter(OutputStream outputStream) {
              writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream)));
          }
  
          public OutputWriter(Writer writer) {
              this.writer = new PrintWriter(writer);
          }
  
          public void close() {
              writer.close();
          }
  
          public void println(long i) {
              writer.println(i);
          }
  
      }
  
      static interface EzIntSet extends EzIntCollection {
          int size();
  
          EzIntIterator iterator();
  
          boolean equals(Object object);
  
          int hashCode();
  
          String toString();
  
      }
  }
  
  