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 Ruby (2.3.3) (judge verdict: Wrong Answer)

h,w,d = gets.split(" ").map(&:to_i)

arr = []
h.times do
  arr += gets.split(" ").map(&:to_i)
end

q = gets.to_i

task = []
q.times do
  input = gets.split(" ").map(&:to_i)
  task << {L:input[0], R:input[1]}
end

done = {}
mana = Array.new(task.size,0)
x = 0
task.each_with_index do |t,idx|
  mana[idx] = 0

  # 探索済みのタスクかチェック
  if done.has_key?(t)
#    puts "atta"
    mana[idx] = done[t]
  end

#  puts "index : #{arr.index(t[:L])}"
  x = t[:L]

  while true

    # 探索終了
    # t[:L] -> t[:R]までの魔力
    if x == t[:R]
      done[t] = mana[idx]
      break
    end

    # 今いる所
    index = arr.index(x)
    j = (index % w) + 1
    i = (index / w) + 1
#    puts "i : #{i} j : #{j}"

    # 今いる所からゴールまでのルートが探索済みかチェック
    key = {:L=>x,:R=>t[:R]}
    if done.has_key?(key)
      mana[idx] += done[key]
      done[t] = mana[idx]
      break
    end

    x += d
    index = arr.index(x)
    pos_y = (index % w) + 1
    pos_x = (index / w) + 1
#    puts "x : #{pos_x} y : #{pos_y}"

    mana[idx] += (pos_x - i).abs + (pos_y - j).abs

    # t[:L] -> x (スタート→現在地点)までに必要な魔力
    key = {:L=>t[:L],:R=>x}
    done[key] = mana[idx]

  end

end

#p done
puts mana