Problem:
Score : 400 points

Problem Statement

We have a grid with H rows and W columns. The square at the i-th row and the j-th column will be called Square (i,j).

The integers from 1 through H×W are written throughout the grid, and the integer written in Square (i,j) is A_{i,j}.

You, a magical girl, can teleport a piece placed on Square (i,j) to Square (x,y) by consuming |x-i|+|y-j| magic points.

You now have to take Q practical tests of your ability as a magical girl.

The i-th test will be conducted as follows:

Initially, a piece is placed on the square where the integer L_i is written.

Let x be the integer written in the square occupied by the piece. Repeatedly move the piece to the square where the integer x+D is written, as long as x is not R_i. The test ends when x=R_i.

Here, it is guaranteed that R_i-L_i is a multiple of D.

For each test, find the sum of magic points consumed during that test.

Constraints

1 \leq H,W \leq 300

1 \leq D \leq H×W

1 \leq A_{i,j} \leq H×W

A_{i,j} \neq A_{x,y} ((i,j) \neq (x,y))

1 \leq Q \leq 10^5

1 \leq L_i \leq R_i \leq H×W

(R_i-L_i) is a multiple of D.

Input

Input is given from Standard Input in the following format:

H W D
A_{1,1} A_{1,2} ... A_{1,W}
:
A_{H,1} A_{H,2} ... A_{H,W}
Q
L_1 R_1
:
L_Q R_Q

Output

For each test, print the sum of magic points consumed during that test.

Output should be in the order the tests are conducted.

Sample Input 1

3 3 2
1 4 3
2 5 7
8 9 6
1
4 8

Sample Output 1

5

4 is written in Square (1,2).

6 is written in Square (3,3).

8 is written in Square (3,1).

Thus, the sum of magic points consumed during the first test is (|3-1|+|3-2|)+(|3-3|+|1-3|)=5.

Sample Input 2

4 2 3
3 7
1 4
5 2
6 8
2
2 2
2 2

Sample Output 2

0
0

Note that there may be a test where the piece is not moved at all, and there may be multiple identical tests.

Sample Input 3

5 5 4
13 25 7 15 17
16 22 20 2 9
14 11 12 1 19
10 6 23 8 18
3 21 5 24 4
3
13 13
2 10
13 13

Sample Output 3

0
5
0

Solution in Scala (2.11.7) (judge verdict: Time Limit Exceeded)

object Main extends App {
  val reader = new StdinReader
  val h, w, d = reader.nextInt
  val table: Map[Int, (Int, Int)] = (for {
        y <- 0 until h
        x <- 0 until w
      } yield reader.nextInt -> (x, y)).toMap

  (1 to reader.nextInt).foreach{i =>
    val l, r = reader.nextInt
    println(((l to r by d).sliding(2).map{l =>
      val lPos = table(l.head)
      val rPos = table(l.last)
      Math.abs(lPos._1 - rPos._1) + Math.abs(lPos._2 - rPos._2)
    }).sum)
  }


class StdinReader {
  val is = System.in
  val buffer = new Array[Byte](1024 * 1024)
  var size = 0
  var pos = 0

  private def readByte: Byte = {
    if (pos >= size) {
      pos = 0;
      size = is.read(buffer);
    }
    if (size < 0) -1
    else {
      val ret = buffer(pos)
      pos += 1
      ret
    }
  }

  // support single byte char only
  def next: String = {
    val sb = new StringBuilder
    var reading = false
    var completed = false
    while(!completed) {
      val b = readByte

      if ('!' <= b && b <= '~') {
        sb.append(b.asInstanceOf[Char])
        reading = true
      } else {
        if (reading) completed = true
      }
    }
    sb.toString
  }

  def nextInt: Int = {
    var i = 0
    var reading = false
    var completed = false
    while(!completed) {
      val b = readByte

      if (b == '-') {
        reading = true
        i *= -1
      } else if ('0' <= b && b <= '9') {
        reading = true
        i = i * 10 + (b - '0')
      } else if (reading) completed = true
    }
    i
  }
}
}