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

h, w, d = [int(x) for x in input().split()]
n = h*w
a = [[int(x) for x in input().split()] for _ in range(h)]
q = int(input())
lr = [[int(x) for x in input().split()] for _ in range(q)]

from collections import defaultdict
b = defaultdict(list)
for i in range(h):
    for j in range(w):
        b[a[i][j] - 1] = [i, j]
g = [[float('inf')]*(h*w) for _ in range(h*w)]
for i in range(n):
    g[i][i] = 0
for i in range(h*w):
    if i + d >= h*w:
        break
    x1, y1 = b[i]
    x2, y2 = b[i + d]
    g[i][i + d] = abs(x1 - x2) + abs(y1 - y2)

"""
ワーシャルフロイド法:O(n^3)
n:頂点数
"""
def warshall_floyd(d):
    for k in range(n):
        for i in range(n):
            for j in range(n):
                d[i][j] = min(d[i][j], d[i][k] + d[k][j])
    return d

g = warshall_floyd(g)

for i in range(q):
    l, r = lr[i]
    l -= 1
    r -= 1
    print(g[l][r])

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

h, w, d = [int(x) for x in input().split()]
a = [[int(x) for x in input().split()] for _ in range(h)]
q = int(input())
lr = [[int(x) for x in input().split()] for _ in range(q)]

dic = {}

for i in range(h):
    for j in range(w):
        dic[a[i][j]] = (i, j)

dis = {}

for i in range(1, d + 1):
    dis[i] = 0
    while i + d <= h * w:
        dis[i + d] = dis[i] + abs(dic[i + d][0] - dic[i][0]) + abs(dic[i + d][1] - dic[i][1])
        i += d

for i in range(q):
    l, r = lr[i]
    print(dis[r] - dis[l])

Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline

h, w, d = [int(x) for x in input().split()]
a = [[int(x) for x in input().split()] for _ in range(h)]
q = int(input())
lr = [[int(x) for x in input().split()] for _ in range(q)]

dic = {}

for i in range(h):
    for j in range(w):
        dic[a[i][j]] = (i, j)

dis = {}

for i in range(1, d + 1):
    dis[i] = 0
    while i + d < h * w:
        dis[i + d] = dis[i] + abs(dic[i + d][0] - dic[i][0]) + abs(dic[i + d][1] - dic[i][1])
        i += d

for i in range(q):
    l, r = lr[i]
    print(dis[r] - dis[l])




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

h, w, d = [int(x) for x in input().split()]
a = [[int(x) for x in input().split()] for _ in range(h)]
q = int(input())
lr = [[int(x) for x in input().split()] for _ in range(q)]

dic = {}

for i in range(h):
    for j in range(w):
        dic[a[i][j]] = (i, j)

dis = {}

for i in range(1, d + 1):
    dis[i] = 0
    while i + d <= h * w:
        dis[i + d] = dis[i] + abs(dic[i + d][0] - dic[i][0]) + abs(dic[i + d][1] - dic[i][1])
        i += d

for i in range(q):
    l, r = lr[i]
    print(dis[r] - dis[l])

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

h, w, d = [int(x) for x in input().split()]
a = [[int(x) for x in input().split()] for _ in range(h)]
q = int(input())
lr = [[int(x) for x in input().split()] for _ in range(q)]

dic = {}

for i in range(h):
    for j in range(w):
        dic[a[i][j]] = (i, j)

for i in range(q):
    l, r = lr[i]
    res = 0
    while l < r:
        res += abs(dic[l][0] - dic[l + d][0]) + abs(dic[l][1] - dic[l + d][1])
        l += d
    print(res)


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

h, w, d = [int(x) for x in input().split()]
a = [[int(x) for x in input().split()] for _ in range(h)]
q = int(input())
lr = [[int(x) for x in input().split()] for _ in range(q)]

dic = {}

for i in range(h):
    for j in range(w):
        dic[a[i][j]] = (i, j)

dis = {}

for i in range(1, d + 1):
    dis[i] = 0
    while i + d <= h * w:
        dis[i + d] = dis[i] + abs(dic[i + d][0] - dic[i][0]) + abs(dic[i + d][1] - dic[i][1])
        i += d

for i in range(q):
    l, r = lr[i]
    print(dis[r] - dis[l])