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 5.4.1) (judge verdict: Time Limit Exceeded)

#include <stdio.h>
#include <string.h>
int main (void){
        int H,W,D,Q,L[100000],R[100000],now,tmp[90001],Ax[100001],Ay[100001],p;
        //int varLx,varLy,varRx,varRy;
        int ans;

        scanf("%d %d %d",&H,&W,&D);

        for (int i = 0; i < H; i++) {
                for (int j = 0; j < W; j++) {
                        scanf("%d",&p);
                        Ax[p]=j;
                        Ay[p]=i;
                }
        }
        scanf("%d",&Q);
        for (int i = 0; i < Q; i++) {
                scanf("%d",&L[i]);
                scanf("%d",&R[i]);
        }

        for (int i = 0; i < Q; i++)
        {
                ans=0;
                now=L[i];
                while(now!=R[i]) {
                        if (tmp[now]==0) {
                                tmp[now]=(abs(Ax[now]-Ax[now+D])+abs(Ay[now]-Ay[now+D]));
                                ans+=tmp[now];
                        }else{
                                ans+=tmp[now];
                        }
                        now+=D;
                }
                printf("%d\n",ans );
        }

        return 0;
}