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 C (GCC 9.2.1) (judge verdict: Wrong Answer)

#include<stdio.h>

int abs(int a){
  if(a >= 0){
    return a;
  }
  else{
    return -a;
  }
}

int main(void){
  int h , w , d;
  scanf("%d %d %d",&h ,&w ,&d);

  int a , iti[h*w][2];
  for(int i = 0;i < h;i ++){
    for(int j = 0;j < w;j ++){
      scanf("%d",&a);
      iti[a][0] = i+1;
      iti[a][1] = j+1;
    }
  }

  int q;
  scanf("%d",&q);
  int l[q] , r[q];
  for(int i = 0;i < q;i ++){
    scanf("%d %d",&l[i] ,&r[i]);
  }

  int ans = 0;
  for(int i = 0;i < q;i ++){
    int x = l[i];
    ans = 0;
    while(x != r[i]){
      ans += abs(iti[x][0] - iti[x+d][0]) + abs(iti[x][1] - iti[x+d][1]);
      x += d;
    }

    printf("%d\n",ans);
  }

  return 0;

}