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

H, W = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
B = [list(map(int, input().split())) for _ in range(H)]
SIZE = 10

AB = [[0 for _ in range(W)] for _ in range(H)]

for i in range(H):
    for j in range(W):
        AB[i][j] = abs(A[i][j] - B[i][j])


dp = [[0 for _ in range(W)] for _ in range(H)]

dp[0][0] = 1 << (SIZE + AB[i][j] - 1) | 1 << (SIZE - AB[i][j] - 1)
for i in range(H):
    for j in range(W):
        dp[i][j] |= (dp[i - 1][j] << AB[i][j]) | (dp[i - 1][j] >> AB[i][j])
        dp[i][j] |= (dp[i][j - 1] << AB[i][j]) | (dp[i][j - 1] >> AB[i][j])

for i in range(SIZE):
    if (dp[-1][-1] >> (i + SIZE)) & 1:
        print(i)
        exit()

Fixed submission:
H, W = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
B = [list(map(int, input().split())) for _ in range(H)]

dp = [[0 for _ in range(W)] for _ in range(H)]

SIZE = 20000

D = abs(A[0][0] - B[0][0])
dp[0][0] = 1 << SIZE - D | 1 << SIZE + D
#print("dp:", dp)

for i in range(H):
  for j in range(W):
    D = abs(A[i][j] - B[i][j])
    dp[i][j] |= dp[i - 1][j] << D | dp[i - 1][j] >> D
    dp[i][j] |= dp[i][j - 1] << D | dp[i][j - 1] >> D

#for i in range(H):
#  a = list(map(lambda x: bin(x)[2::], dp[i]))
#  print(a)

for i in range(SIZE):
  if (dp[-1][-1] >> (SIZE + i)) & 1:
    print(i)
    exit()

Buggy python submission (verdict: Runtime Error):
H, W = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
B = [list(map(int, input().split())) for _ in range(H)]

C = [[] for _ in range(H)]
for i in range(H):
  for j in range(W):
    C[i].append(abs(A[i][j] - B[i][j]))
#print(C)

ww = max([sum(C[i]) for i in range(H)])
hh = max([sum([C[j][i] for j in range(H)]) for i in range(W)])

dp = [[[0 for _ in range(hh + ww + 1)] for _ in range(W)] for _ in range(H)]
#print(dp)

dp[0][0][C[0][0]] = 1
for i in range(H):
  for j in range(W):
    for k in range(hh + ww + 1):
      if dp[i-1][j][k]:
        dp[i][j][k + C[i][j]] = 1
        dp[i][j][abs(k - C[i][j])] = 1
      if dp[i][j-1][k]:
        dp[i][j][k + C[i][j]] = 1
        dp[i][j][abs(k - C[i][j])] = 1

for i in range(hh + ww + 1):
  if dp[H-1][W-1][i]:
    print(i)
    exit()

Fixed submission:
H, W = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
B = [list(map(int, input().split())) for _ in range(H)]

dp = [[0 for _ in range(W)] for _ in range(H)]

SIZE = 20000

D = abs(A[0][0] - B[0][0])
dp[0][0] = 1 << SIZE - D | 1 << SIZE + D
#print("dp:", dp)

for i in range(H):
  for j in range(W):
    D = abs(A[i][j] - B[i][j])
    dp[i][j] |= dp[i - 1][j] << D | dp[i - 1][j] >> D
    dp[i][j] |= dp[i][j - 1] << D | dp[i][j - 1] >> D

#for i in range(H):
#  a = list(map(lambda x: bin(x)[2::], dp[i]))
#  print(a)

for i in range(SIZE):
  if (dp[-1][-1] >> (SIZE + i)) & 1:
    print(i)
    exit()

Buggy python submission (verdict: Time Limit Exceeded):
H, W = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
B = [list(map(int, input().split())) for _ in range(H)]

C = [[] for _ in range(H)]
for i in range(H):
  for j in range(W):
    C[i].append(abs(A[i][j] - B[i][j]))
#print(C)

dp = [[[0 for _ in range((H + W) * 80 + 1)] for _ in range(W)] for _ in range(H)]
#print(dp)

dp[0][0][C[0][0]] = 1
for i in range(H):
  for j in range(W):
    for k in range((H+W)*80+1):
      if dp[i-1][j][k]:
        dp[i][j][k + C[i][j]] = 1
        dp[i][j][abs(k - C[i][j])] = 1
      if dp[i][j-1][k]:
        dp[i][j][k + C[i][j]] = 1
        dp[i][j][abs(k - C[i][j])] = 1

for i in range((H+W)*80+1):
  if dp[H-1][W-1][i]:
    print(i)
    exit()

Fixed submission:
H, W = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(H)]
B = [list(map(int, input().split())) for _ in range(H)]

dp = [[0 for _ in range(W)] for _ in range(H)]

SIZE = 20000

D = abs(A[0][0] - B[0][0])
dp[0][0] = 1 << SIZE - D | 1 << SIZE + D
#print("dp:", dp)

for i in range(H):
  for j in range(W):
    D = abs(A[i][j] - B[i][j])
    dp[i][j] |= dp[i - 1][j] << D | dp[i - 1][j] >> D
    dp[i][j] |= dp[i][j - 1] << D | dp[i][j - 1] >> D

#for i in range(H):
#  a = list(map(lambda x: bin(x)[2::], dp[i]))
#  print(a)

for i in range(SIZE):
  if (dp[-1][-1] >> (SIZE + i)) & 1:
    print(i)
    exit()