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: Accepted)

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1001001001;

int main(){
    int h, w, d; cin >> h >> w >> d;
    vector<vector<pair<int, pair<int, int>>>> mp(d);
    for(int i = 0; i < h; i++){
        for(int j = 0; j < w; j++){
            int a; cin >> a;
            mp[a % d].push_back({a, make_pair(i,j)});
        }
    }
    for(int i = 0; i < d; i++){
        sort(mp[i].begin(), mp[i].end());
    }
    vector<vector<int>> sum(d);
    for(int i = 0; i < d; i++){
        sum[i].push_back(0);
        int x = mp[i][0].second.first, y = mp[i][0].second.second;
        for(int j = 1; j < mp[i].size(); j++){
            int nx = mp[i][j].second.first, ny = mp[i][j].second.second;
            sum[i].push_back(abs(nx - x) + abs(ny - y) + sum[i][j-1]);
            x = nx; y = ny;
        }
    }
    int q; cin >> q;
    for(int i = 0; i < q; i++){
        int l, r; cin >> l >> r;
        cout << sum[r%d][(r-1)/d] - sum[l%d][(l-1)/d]  << endl;
    }
}