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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
const int N=450;
struct node{
    int x,y;
}e[N*N];
int n,m,d;
bool bj[N*N];
int pre[N*N];
int zzh[N*N];
void cl()
{
    for(int i=1;i<=90000;i++){
        if(!bj[i]){
            int x=e[i].x,y=e[i].y,sum=0;
            for(int j=i;j<=90000;j+=d){
                pre[j]=i;bj[j]=1;
                zzh[j]=sum+abs(e[j].x-x)+abs(e[j].y-y);
                sum=zzh[j];x=e[j].x;y=e[j].y;
            }
        }
    }
}
int main()
{
    scanf("%d%d%d",&n,&m,&d);
    for(int i=1;i<=n;i++)
    for(int j=1,a;j<=m;j++)scanf("%d",&a),e[a].x=i,e[a].y=j;
    cl();
    int q;
    scanf("%d",&q);int l,r;
   // for(int i=1;i<=n*m;i++)cout<<zzh[i]<<endl;
    while(q--){
        scanf("%d%d",&l,&r);
        printf("%d\n",zzh[r]-zzh[l]);
    }
}