Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp1 = [set() for _ in range(W)]
dp1[0].add(X[0][0])
dp2 = [set() for _ in range(W)]
for i in range(H):
  if i % 2 == 0:
    dp2 = [set() for _ in range(W)]
  else: dp1 = [set() for _ in range(W)]
  for j in range(W):
    if i % 2 == 0:
      for k in dp1[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          dp2[j].add(u)
          dp2[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          dp1[j + 1].add(u)
          dp1[j + 1].add(v)
    else:
      for k in dp2[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          dp1[j].add(u)
          dp1[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          dp2[j + 1].add(u)
          dp2[j + 1].add(v)
res = float("inf")
if H % 2:
  for k in dp1[-1]: res = min(k, res)
else:
  for k in dp2[-1]: res = min(k, res)
print(res)

Fixed submission:
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp1 = [set() for _ in range(W)]
dp1[0].add(X[0][0])
dp2 = [set() for _ in range(W)]
dplimit = [[0] * W for _ in range(H)]
dplimit[-1][-1] = 80
for i in range(H - 1, -1, -1):
  for j in range(W - 1, -1, -1):
    x = X[i][j]
    if i > 0: dplimit[i - 1][j] = max(dplimit[i - 1][j], dplimit[i][j] + x)
    if j > 0: dplimit[i][j - 1] = max(dplimit[i][j - 1], dplimit[i][j] + x)
for i in range(H):
  if i % 2 == 0:
    dp2 = [set() for _ in range(W)]
  else: dp1 = [set() for _ in range(W)]
  for j in range(W):
    if i % 2 == 0:
      for k in dp1[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp2[j].add(u)
          if v <= dplimit[i][j]: dp2[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp1[j + 1].add(u)
          if v <= dplimit[i][j]: dp1[j + 1].add(v)
    else:
      for k in dp2[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp1[j].add(u)
          if v <= dplimit[i][j]: dp1[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp2[j + 1].add(u)
          if v <= dplimit[i][j]: dp2[j + 1].add(v)
res = float("inf")
if H % 2:
  for k in dp1[-1]: res = min(k, res)
else:
  for k in dp2[-1]: res = min(k, res)
print(res)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp = [[set() for _ in range(W)] for _ in range(H)]
dp[0][0].add(X[0][0])
dplimit = [[0] * W for _ in range(H)]
dplimit[-1][-1] = 80
for i in range(H - 1, -1, -1):
  for j in range(W - 1, -1, -1):
    x = X[i][j]
    if i > 0: dplimit[i - 1][j] = max(dplimit[i - 1][j], dplimit[i][j] + x)
    if j > 0: dplimit[i][j - 1] = max(dplimit[i][j - 1], dplimit[i][j] + x)
for i in range(H):
  for j in range(W):
    for k in dp[i][j]:
      if i + 1 < H:
        u = k + X[i + 1][j]
        v = abs(k - X[i + 1][j])
        if u <= dplimit[i][j]: dp[i + 1][j].add(u)
        if v <= dplimit[i][j]: dp[i + 1][j].add(v)
      if j + 1 < W:
        u = k + X[i][j + 1]
        v = abs(k - X[i][j + 1])
        if u <= dplimit[i][j]: dp[i][j + 1].add(u)
        if v <= dplimit[i][j]: dp[i][j + 1].add(v)
res = float("inf")
#print(dp[1][1])
for k in dp[-1][-1]: res = min(k, res)
print(res)

Fixed submission:
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp1 = [set() for _ in range(W)]
dp1[0].add(X[0][0])
dp2 = [set() for _ in range(W)]
dplimit = [[0] * W for _ in range(H)]
dplimit[-1][-1] = 80
for i in range(H - 1, -1, -1):
  for j in range(W - 1, -1, -1):
    x = X[i][j]
    if i > 0: dplimit[i - 1][j] = max(dplimit[i - 1][j], dplimit[i][j] + x)
    if j > 0: dplimit[i][j - 1] = max(dplimit[i][j - 1], dplimit[i][j] + x)
for i in range(H):
  if i % 2 == 0:
    dp2 = [set() for _ in range(W)]
  else: dp1 = [set() for _ in range(W)]
  for j in range(W):
    if i % 2 == 0:
      for k in dp1[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp2[j].add(u)
          if v <= dplimit[i][j]: dp2[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp1[j + 1].add(u)
          if v <= dplimit[i][j]: dp1[j + 1].add(v)
    else:
      for k in dp2[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp1[j].add(u)
          if v <= dplimit[i][j]: dp1[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp2[j + 1].add(u)
          if v <= dplimit[i][j]: dp2[j + 1].add(v)
res = float("inf")
if H % 2:
  for k in dp1[-1]: res = min(k, res)
else:
  for k in dp2[-1]: res = min(k, res)
print(res)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp = [[set() for _ in range(W)] for _ in range(H)]
dp[0][0].add(X[0][0])
for i in range(H):
  for j in range(W):
    for k in dp[i][j]:
      if i + 1 < H:
        u = k + X[i + 1][j]
        v = abs(k - X[i + 1][j])
        dp[i + 1][j].add(u)
        dp[i + 1][j].add(v)
      if j + 1 < W:
        u = k + X[i][j + 1]
        v = abs(k - X[i][j + 1])
        dp[i][j + 1].add(u)
        dp[i][j + 1].add(v)
res = float("inf")
#print(dp[1][1])
for k in dp[-1][-1]: res = min(k, res)
print(res)

Fixed submission:
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp1 = [set() for _ in range(W)]
dp1[0].add(X[0][0])
dp2 = [set() for _ in range(W)]
dplimit = [[0] * W for _ in range(H)]
dplimit[-1][-1] = 80
for i in range(H - 1, -1, -1):
  for j in range(W - 1, -1, -1):
    x = X[i][j]
    if i > 0: dplimit[i - 1][j] = max(dplimit[i - 1][j], dplimit[i][j] + x)
    if j > 0: dplimit[i][j - 1] = max(dplimit[i][j - 1], dplimit[i][j] + x)
for i in range(H):
  if i % 2 == 0:
    dp2 = [set() for _ in range(W)]
  else: dp1 = [set() for _ in range(W)]
  for j in range(W):
    if i % 2 == 0:
      for k in dp1[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp2[j].add(u)
          if v <= dplimit[i][j]: dp2[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp1[j + 1].add(u)
          if v <= dplimit[i][j]: dp1[j + 1].add(v)
    else:
      for k in dp2[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp1[j].add(u)
          if v <= dplimit[i][j]: dp1[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp2[j + 1].add(u)
          if v <= dplimit[i][j]: dp2[j + 1].add(v)
res = float("inf")
if H % 2:
  for k in dp1[-1]: res = min(k, res)
else:
  for k in dp2[-1]: res = min(k, res)
print(res)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp = [[[0] * (80 * 80 * 2 + 1) for _ in range(W)] for _ in range(H)]
dp[0][0][X[0][0]] = 1
for i in range(H):
  for j in range(W):
    for k in range(80 * 3 + 1):
      if dp[i][j][k] == 0: continue
      if i + 1 < H:
        u = k + X[i + 1][j]
        v = abs(k - X[i + 1][j])
        dp[i + 1][j][u] += dp[i][j][k]
        dp[i + 1][j][v] += dp[i][j][k]
      if j + 1 < W:
        u = k + X[i][j + 1]
        v = abs(k - X[i][j + 1])
        dp[i][j + 1][u] += dp[i][j][k]
        dp[i][j + 1][v] += dp[i][j][k]
res = 80
#print(dp[1][1])
for k in range(81):
  if dp[-1][-1][k]: res = min(k, res)
print(res)

Fixed submission:
import sys
input = sys.stdin.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)]
X = [[abs(A[i][j] - B[i][j]) for j in range(W)] for i in range(H)]
dp1 = [set() for _ in range(W)]
dp1[0].add(X[0][0])
dp2 = [set() for _ in range(W)]
dplimit = [[0] * W for _ in range(H)]
dplimit[-1][-1] = 80
for i in range(H - 1, -1, -1):
  for j in range(W - 1, -1, -1):
    x = X[i][j]
    if i > 0: dplimit[i - 1][j] = max(dplimit[i - 1][j], dplimit[i][j] + x)
    if j > 0: dplimit[i][j - 1] = max(dplimit[i][j - 1], dplimit[i][j] + x)
for i in range(H):
  if i % 2 == 0:
    dp2 = [set() for _ in range(W)]
  else: dp1 = [set() for _ in range(W)]
  for j in range(W):
    if i % 2 == 0:
      for k in dp1[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp2[j].add(u)
          if v <= dplimit[i][j]: dp2[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp1[j + 1].add(u)
          if v <= dplimit[i][j]: dp1[j + 1].add(v)
    else:
      for k in dp2[j]:
        if i + 1 < H:
          u = k + X[i + 1][j]
          v = abs(k - X[i + 1][j])
          if u <= dplimit[i][j]: dp1[j].add(u)
          if v <= dplimit[i][j]: dp1[j].add(v)
        if j + 1 < W:
          u = k + X[i][j + 1]
          v = abs(k - X[i][j + 1])
          if u <= dplimit[i][j]: dp2[j + 1].add(u)
          if v <= dplimit[i][j]: dp2[j + 1].add(v)
res = float("inf")
if H % 2:
  for k in dp1[-1]: res = min(k, res)
else:
  for k in dp2[-1]: res = min(k, res)
print(res)