Buggy python submission (verdict: Time Limit Exceeded):
H, W = map(int, input().split())
AB = []
max_ab = 0
for i in range(H):
  AB.append(list(map(int, input().split())))
  max_ab = max(max_ab, max(AB[-1]))

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

K = max_ab*(H + W) + 1
dp = [[[False]*K for w in range(W+1)] for h in range(H+1)]
dp[0][0][0] = True
dp[0][1][0] = True
dp[1][0][0] = True

for h in range(H):
  for w in range(W):
    ab = AB[h][w]
    for i, tp in enumerate(dp[h][w+1]):
      if not tp:
        continue
        
      dp[h+1][w+1][abs(i+ab)] = True
      dp[h+1][w+1][abs(i-ab)] = True
      
    for i, tp in enumerate(dp[h+1][w]):
      if not tp:
        continue
      
      dp[h+1][w+1][abs(i+ab)] = True
      dp[h+1][w+1][abs(i-ab)] = True

for k in range(K):
  if dp[H][W][k]:
    print(k)
    break

Fixed submission:
H, W = map(int, input().split())
AB = []
max_ab = 0
for i in range(H):
  AB.append(list(map(int, input().split())))
  max_ab = max(max_ab, max(AB[-1]))

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

base = max_ab*(H + W)
dp = [[1 << base for w in range(W)] for h in range(H)]
dp[0][0] = (1 << base + AB[0][0]) | (1 << base - AB[0][0])
for h in range(1, H):
  dp[h][0] = (dp[h-1][0] << AB[h][0]) | (dp[h-1][0] >> AB[h][0])

for w in range(1, W):
  dp[0][w] = (dp[0][w-1] << AB[0][w]) | (dp[0][w-1] >> AB[0][w])

for h in range(1, H):
  for w in range(1, W):
    dp[h][w] = (
      (dp[h-1][w] << AB[h][w]) | (dp[h-1][w] >> AB[h][w]) 
      | (dp[h][w-1] << AB[h][w]) | (dp[h][w-1] >> AB[h][w]))

positive = bin(dp[H-1][W-1] >> base)
print(positive[::-1].find('1'))

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

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

K = 80*(H + W) + 1
dp = [[[False]*K for w in range(W+1)] for h in range(H+1)]
dp[0][0][0] = True
dp[0][1][0] = True
dp[1][0][0] = True

for h in range(H):
  for w in range(W):
    ab = AB[h][w]
    for i, tp in enumerate(dp[h][w+1]):
      if not tp:
        continue
        
      dp[h+1][w+1][abs(i+ab)] = True
      dp[h+1][w+1][abs(i-ab)] = True
      
    for i, tp in enumerate(dp[h+1][w]):
      if not tp:
        continue
      
      dp[h+1][w+1][abs(i+ab)] = True
      dp[h+1][w+1][abs(i-ab)] = True

for k in range(K):
  if dp[H][W][k]:
    print(k)
    break

Fixed submission:
H, W = map(int, input().split())
AB = []
max_ab = 0
for i in range(H):
  AB.append(list(map(int, input().split())))
  max_ab = max(max_ab, max(AB[-1]))

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

base = max_ab*(H + W)
dp = [[1 << base for w in range(W)] for h in range(H)]
dp[0][0] = (1 << base + AB[0][0]) | (1 << base - AB[0][0])
for h in range(1, H):
  dp[h][0] = (dp[h-1][0] << AB[h][0]) | (dp[h-1][0] >> AB[h][0])

for w in range(1, W):
  dp[0][w] = (dp[0][w-1] << AB[0][w]) | (dp[0][w-1] >> AB[0][w])

for h in range(1, H):
  for w in range(1, W):
    dp[h][w] = (
      (dp[h-1][w] << AB[h][w]) | (dp[h-1][w] >> AB[h][w]) 
      | (dp[h][w-1] << AB[h][w]) | (dp[h][w-1] >> AB[h][w]))

positive = bin(dp[H-1][W-1] >> base)
print(positive[::-1].find('1'))

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

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

K = 80*(H + W)
dp = [[[False]*K for w in range(W)] for h in range(H)]
dp[0][0][abs(AB[0][0])] = True


for h in range(H):
  for w in range(W):
    if h == 0:
      if w == 0:
        continue
      else:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h][w-1][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h][w-1][k1]
          else:
            dp[h][w][k] = dp[h][w-1][k2]
    else:
      if w == 0:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h-1][w][k1] or dp[h-1][w][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h-1][w][k1]
          else:
            dp[h][w][k] = dp[h-1][w][k2]
      else:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h][w-1][k2] or dp[h-1][w][k1] or dp[h-1][w][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h-1][w][k1]
          else:
            dp[h][w][k] = dp[h][w-1][k2] or dp[h-1][w][k2]

for k in range(K):
  if dp[H-1][W-1][k]:
    print(k)
    break
  

Fixed submission:
H, W = map(int, input().split())
AB = []
max_ab = 0
for i in range(H):
  AB.append(list(map(int, input().split())))
  max_ab = max(max_ab, max(AB[-1]))

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

base = max_ab*(H + W)
dp = [[1 << base for w in range(W)] for h in range(H)]
dp[0][0] = (1 << base + AB[0][0]) | (1 << base - AB[0][0])
for h in range(1, H):
  dp[h][0] = (dp[h-1][0] << AB[h][0]) | (dp[h-1][0] >> AB[h][0])

for w in range(1, W):
  dp[0][w] = (dp[0][w-1] << AB[0][w]) | (dp[0][w-1] >> AB[0][w])

for h in range(1, H):
  for w in range(1, W):
    dp[h][w] = (
      (dp[h-1][w] << AB[h][w]) | (dp[h-1][w] >> AB[h][w]) 
      | (dp[h][w-1] << AB[h][w]) | (dp[h][w-1] >> AB[h][w]))

positive = bin(dp[H-1][W-1] >> base)
print(positive[::-1].find('1'))

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

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

K = 80*(H + W)
dp = [[[False]*K for w in range(W)] for h in range(H)]
dp[0][0][abs(AB[0][0])] = True


for h in range(H):
  for w in range(W):
    if h == 0:
      if w == 0:
        continue
      else:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h][w-1][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h][w-1][k1]
          else:
            dp[h][w][k] = dp[h][w-1][k2]
    else:
      if w == 0:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h-1][w][k1] or dp[h-1][w][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h-1][w][k1]
          else:
            dp[h][w][k] = dp[h-1][w][k2]
      else:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h][w-1][k2] or dp[h-1][w][k1] or dp[h-1][w][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h-1][w][k1]
          else:
            dp[h][w][k] = dp[h][w-1][k2] or dp[h-1][w][k2]

for k in range(K):
  if dp[H-1][W-1][k]:
    print(k)
    break

Fixed submission:
H, W = map(int, input().split())
AB = []
max_ab = 0
for i in range(H):
  AB.append(list(map(int, input().split())))
  max_ab = max(max_ab, max(AB[-1]))

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

base = max_ab*(H + W)
dp = [[1 << base for w in range(W)] for h in range(H)]
dp[0][0] = (1 << base + AB[0][0]) | (1 << base - AB[0][0])
for h in range(1, H):
  dp[h][0] = (dp[h-1][0] << AB[h][0]) | (dp[h-1][0] >> AB[h][0])

for w in range(1, W):
  dp[0][w] = (dp[0][w-1] << AB[0][w]) | (dp[0][w-1] >> AB[0][w])

for h in range(1, H):
  for w in range(1, W):
    dp[h][w] = (
      (dp[h-1][w] << AB[h][w]) | (dp[h-1][w] >> AB[h][w]) 
      | (dp[h][w-1] << AB[h][w]) | (dp[h][w-1] >> AB[h][w]))

positive = bin(dp[H-1][W-1] >> base)
print(positive[::-1].find('1'))

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

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

K = 80*H*W
dp = [[[False]*K for w in range(W)] for h in range(H)]
dp[0][0][abs(AB[0][0])] = True


for h in range(H):
  for w in range(W):
    if h == 0:
      if w == 0:
        continue
      else:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h][w-1][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h][w-1][k1]
          else:
            dp[h][w][k] = dp[h][w-1][k2]
    else:
      if w == 0:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h-1][w][k1] or dp[h-1][w][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h-1][w][k1]
          else:
            dp[h][w][k] = dp[h-1][w][k2]
      else:
        for k in range(K):
          ab = AB[h][w]
          k1, k2 = abs(k - ab), k + ab
          if k1 < K and k2 < K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h][w-1][k2] or dp[h-1][w][k1] or dp[h-1][w][k2]
          elif k1 < K and k2 >= K:
            dp[h][w][k] = dp[h][w-1][k1] or dp[h-1][w][k1]
          else:
            dp[h][w][k] = dp[h][w-1][k2] or dp[h-1][w][k2]

for k in range(K):
  if dp[H-1][W-1][k]:
    print(k)
    break

Fixed submission:
H, W = map(int, input().split())
AB = []
max_ab = 0
for i in range(H):
  AB.append(list(map(int, input().split())))
  max_ab = max(max_ab, max(AB[-1]))

for i in range(H):
  AB[i] = [abs(AB[i][j] - int(b)) for j, b in enumerate(input().split())]

base = max_ab*(H + W)
dp = [[1 << base for w in range(W)] for h in range(H)]
dp[0][0] = (1 << base + AB[0][0]) | (1 << base - AB[0][0])
for h in range(1, H):
  dp[h][0] = (dp[h-1][0] << AB[h][0]) | (dp[h-1][0] >> AB[h][0])

for w in range(1, W):
  dp[0][w] = (dp[0][w-1] << AB[0][w]) | (dp[0][w-1] >> AB[0][w])

for h in range(1, H):
  for w in range(1, W):
    dp[h][w] = (
      (dp[h-1][w] << AB[h][w]) | (dp[h-1][w] >> AB[h][w]) 
      | (dp[h][w-1] << AB[h][w]) | (dp[h][w-1] >> AB[h][w]))

positive = bin(dp[H-1][W-1] >> base)
print(positive[::-1].find('1'))