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# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ABC089D2 {
    class Program {
        static void Main(string[] args) {
            int[] HWDInput = Console.ReadLine().Split(' ').Select(s => int.Parse(s)).ToArray();
            int H = HWDInput[0];
            int W = HWDInput[1];
            int D = HWDInput[2];
            int[] xpos = new int[H * W];
            int[] ypos = new int[H * W];
            int[,] alldis = new int[D, (H * W + D - 1) / D];
            for (int i = 0; i < H; i++) {
                int[] input = Console.ReadLine().Split(' ').Select(s => int.Parse(s)).ToArray();
                for (int j = 0; j < W; j++) {
                    int n = input[j] - 1;
                    xpos[n] = i;
                    ypos[n] = j;
                }
            }
            for (int i = 0; i < D; i++) {
                for (int j = 0; j < (H * W + D - 1) / D; j++) {
                    if(j == 0) {
                        alldis[i, j] = 0;
                    } else {
                        int num = i + j * D;
                        if(num < H * W) {
                            int xdis = Math.Abs(xpos[num] - xpos[num - D]);
                            int ydis = Math.Abs(ypos[num] - ypos[num - D]);
                            alldis[i, j] = alldis[i, j - 1] + xdis + ydis;
                        }
                    }
                }
            }
            int Q = int.Parse(Console.ReadLine());
            for (int i = 0; i < Q; i++) {
                int[] LRInput = Console.ReadLine().Split(' ').Select(s => int.Parse(s)).ToArray();
                int L = LRInput[0] - 1;
                int R = LRInput[1] - 1;
                int Li = L % D;
                int Lj = L / D;
                int Rj = R / D;
                Console.WriteLine(alldis[Li , Rj] - alldis[Li , Lj]);
            }
        }
    }
}