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;

namespace AtCoder
{
    class Program
    {
        private const int MODULO = 1000000007;
        private static string Read() { return Console.ReadLine(); }
        private static int ReadInt() { return int.Parse(Read()); }
        private static long ReadLong() { return long.Parse(Read()); }
        private static double ReadDouble() { return double.Parse(Read()); }
        private static int[] ReadInts() { return Array.ConvertAll(Read().Split(), int.Parse); }
        private static long[] ReadLongs() { return Array.ConvertAll(Read().Split(), long.Parse); }
        private static double[] ReadDoubles() { return Array.ConvertAll(Read().Split(), double.Parse); }

        static IEnumerable<int> Solve(int H, int W, int D, Tuple<int, int>[] points, Tuple<int, int>[] queries)
        {
            int[] memo = new int[H * W + 1];
            for (int i = D + 1; i <= H * W; ++i)
            {
                var a = points[i - D];
                var b = points[i];
                memo[i] = memo[i - D] + Math.Abs(b.Item1 - a.Item1) + Math.Abs(b.Item2 - a.Item2);
            }
            return queries.Select(q => memo[q.Item2] - memo[q.Item1]);
        }
        static void Main(string[] args)
        {
            int[] v1 = ReadInts();
            int H = v1[0];
            int W = v1[1];
            int D = v1[2];
            var points = new Tuple<int, int>[H * W + 1];
            for (int i = 0; i < H; ++i)
            {
                int[] v2 = ReadInts();
                for (int j = 0; j < W; ++j)
                {
                    points[v2[j]] = new Tuple<int, int>(i, j);
                }
            }
            int Q = ReadInt();
            var queries = new Tuple<int, int>[Q];
            for (int i = 0; i < Q; ++i)
            {
                int[] v2 = ReadInts();
                queries[i] = new Tuple<int, int>(v2[0], v2[1]);
            }
            foreach (int sum in Solve(H, W, D, points, queries))
            {
                Console.WriteLine(sum);
            }
        }
    }
}