Buggy python submission (verdict: Time Limit Exceeded):
import sys
Input = sys.stdin.readline

H, W, D = map(int, Input().split())
A = [list(map(int, Input().split())) for _ in range(H)]
Q = int(Input())
LR = [list(map(int, Input().split())) for _ in range(Q)]
num_pos = {}

for y, line in enumerate(A):
    for x, num in enumerate(line):
        num_pos[num] = (x, y)

cost_table = {i: {} for i in num_pos.keys()}
for num1 in range(1, H*W+1):
    for num2 in range(num1, H*W+1, D):
        if num1 == num2:
            cost_table[num1][num2] = 0
        else:
            i, j = num_pos[num2-D]
            x, y = num_pos[num2]
            cost_table[num1][num2] = abs(i - x) + abs(j - y) + cost_table[num1][num2-D]

for l, r in LR:
    print(cost_table[l][r])

Fixed submission:
import sys
Input = sys.stdin.readline

H, W, D = map(int, Input().split())
A = [list(map(int, Input().split())) for _ in range(H)]
Q = int(Input())
LR = [list(map(int, Input().split())) for _ in range(Q)]
num_pos = {}

for y, line in enumerate(A):
    for x, num in enumerate(line):
        num_pos[num] = (x, y)

cost_table = {}
for num in range(1, H*W+1):
    if num <= D:
        cost_table[num] = 0
    else:
        i, j = num_pos[num-D]
        x, y = num_pos[num]
        cost_table[num] = abs(i - x) + abs(j - y) + cost_table[num-D]

for l, r in LR:
    print(cost_table[r] - cost_table[l])

Buggy python submission (verdict: Time Limit Exceeded):
H, W, D = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
Q = int(input())
LR = [list(map(int, input().split())) for _ in range(Q)]
num_pos = {}

for y, line in enumerate(A):
    for x, num in enumerate(line):
        num_pos[num] = (x, y)

cost_table = {i: {} for i in num_pos.keys()}
for num1 in sorted(num_pos.keys()):
    for num2 in range(num1, H*W+1, D):
        if num1 == num2:
            cost_table[num1][num2] = 0
        else:
            i, j = num_pos[num2-D]
            x, y = num_pos[num2]
            cost_table[num1][num2] = abs(i - x) + abs(j - y) + cost_table[num1][num2-D]

for l, r in LR:
    print(cost_table[l][r])

Fixed submission:
import sys
Input = sys.stdin.readline

H, W, D = map(int, Input().split())
A = [list(map(int, Input().split())) for _ in range(H)]
Q = int(Input())
LR = [list(map(int, Input().split())) for _ in range(Q)]
num_pos = {}

for y, line in enumerate(A):
    for x, num in enumerate(line):
        num_pos[num] = (x, y)

cost_table = {}
for num in range(1, H*W+1):
    if num <= D:
        cost_table[num] = 0
    else:
        i, j = num_pos[num-D]
        x, y = num_pos[num]
        cost_table[num] = abs(i - x) + abs(j - y) + cost_table[num-D]

for l, r in LR:
    print(cost_table[r] - cost_table[l])

Buggy python submission (verdict: Time Limit Exceeded):
H, W, D = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
Q = int(input())
LR = [list(map(int, input().split())) for _ in range(Q)]
num_pos = {}

for y, line in enumerate(A):
    for x, num in enumerate(line):
        num_pos[num] = (x, y)

for l, r in LR:
    cost = 0
    for d in range(0, r-l, D):
        cost += abs(num_pos[l+d][0] - num_pos[l+d+D][0]) + abs(num_pos[l+d][1] - num_pos[l+d+D][1])
    print(cost)

Fixed submission:
import sys
Input = sys.stdin.readline

H, W, D = map(int, Input().split())
A = [list(map(int, Input().split())) for _ in range(H)]
Q = int(Input())
LR = [list(map(int, Input().split())) for _ in range(Q)]
num_pos = {}

for y, line in enumerate(A):
    for x, num in enumerate(line):
        num_pos[num] = (x, y)

cost_table = {}
for num in range(1, H*W+1):
    if num <= D:
        cost_table[num] = 0
    else:
        i, j = num_pos[num-D]
        x, y = num_pos[num]
        cost_table[num] = abs(i - x) + abs(j - y) + cost_table[num-D]

for l, r in LR:
    print(cost_table[r] - cost_table[l])