Buggy python submission (verdict: Time Limit Exceeded):
H,W=map(int,input().split())
red=[]
blue=[]
for i in range(H):
  A=list(map(int,input().split()))
  red.append(A)
for i in range(H):
  B=list(map(int,input().split()))
  blue.append(B)
list=[[[0 for i in range(80*(j+k+1)+1)] for j in range(W)] for k in range(H)]
list[0][0][abs(red[0][0]-blue[0][0])]=1
for i in range(H):
  for j in range(W):
    for k in range(len(list[i][j])):
      if list[i][j][k]==1:
        if i+1<H:
          if abs(k-abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k-abs(red[i+1][j]-blue[i+1][j]))]=1
          if abs(k+abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k+abs(red[i+1][j]-blue[i+1][j]))]=1
        if j+1<W:
          if abs(k-abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k-abs(red[i][j+1]-blue[i][j+1]))]=1
          if abs(k+abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k+abs(red[i][j+1]-blue[i][j+1]))]=1           
for i in range(12801):
  if list[H-1][W-1][i]==1:
    print(i)
    break


Fixed submission:
H,W=map(int,input().split())
red=[]
blue=[]
for i in range(H):
  A=list(map(int,input().split()))
  red.append(A)
for i in range(H):
  B=list(map(int,input().split()))
  blue.append(B)
list=[[[0 for i in range(80*(j+k+1)+1)] for j in range(W)] for k in range(H)]
list[0][0][abs(red[0][0]-blue[0][0])]=1
for i in range(H):
  for j in range(W):
    for k in range(len(list[i][j])):
      if list[i][j][k]==1:
        if i+1<H:
          if abs(k-abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k-abs(red[i+1][j]-blue[i+1][j]))]=1
          if abs(k+abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k+abs(red[i+1][j]-blue[i+1][j]))]=1
        if j+1<W:
          if abs(k-abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k-abs(red[i][j+1]-blue[i][j+1]))]=1
          if abs(k+abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k+abs(red[i][j+1]-blue[i][j+1]))]=1           
for i in range(12801):
  if list[H-1][W-1][i]==1:
    print(i)
    break

Buggy python submission (verdict: Runtime Error):
H,W=map(int,input().split())
red=[]
blue=[]
for i in range(H):
  A=list(map(int,input().split()))
  red.append(A)
for i in range(H):
  B=list(map(int,input().split()))
  blue.append(B)
list=[[[0 for i in range(80*(j+k+1))] for j in range(W)] for k in range(H)]
list[0][0][abs(red[0][0]-blue[0][0])]=1
for i in range(H):
  for j in range(W):
    for k in range(len(list[i][j])):
      if list[i][j][k]==1:
        if i+1<H:
          if abs(k-abs(red[i+1][j]-blue[i+1][j]))<12801: 
            list[i+1][j][abs(k-abs(red[i+1][j]-blue[i+1][j]))]=1
          if abs(k+abs(red[i+1][j]-blue[i+1][j]))<12801: 
            list[i+1][j][abs(k+abs(red[i+1][j]-blue[i+1][j]))]=1
        if j+1<W:
          if abs(k-abs(red[i][j+1]-blue[i][j+1]))<12801: 
            list[i][j+1][abs(k-abs(red[i][j+1]-blue[i][j+1]))]=1
          if abs(k+abs(red[i][j+1]-blue[i][j+1]))<12801: 
            list[i][j+1][abs(k+abs(red[i][j+1]-blue[i][j+1]))]=1           
for i in range(12801):
  if list[H-1][W-1][i]==1:
    print(i)
    break

Fixed submission:
H,W=map(int,input().split())
red=[]
blue=[]
for i in range(H):
  A=list(map(int,input().split()))
  red.append(A)
for i in range(H):
  B=list(map(int,input().split()))
  blue.append(B)
list=[[[0 for i in range(80*(j+k+1)+1)] for j in range(W)] for k in range(H)]
list[0][0][abs(red[0][0]-blue[0][0])]=1
for i in range(H):
  for j in range(W):
    for k in range(len(list[i][j])):
      if list[i][j][k]==1:
        if i+1<H:
          if abs(k-abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k-abs(red[i+1][j]-blue[i+1][j]))]=1
          if abs(k+abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k+abs(red[i+1][j]-blue[i+1][j]))]=1
        if j+1<W:
          if abs(k-abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k-abs(red[i][j+1]-blue[i][j+1]))]=1
          if abs(k+abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k+abs(red[i][j+1]-blue[i][j+1]))]=1           
for i in range(12801):
  if list[H-1][W-1][i]==1:
    print(i)
    break

Buggy python submission (verdict: Time Limit Exceeded):
H,W=map(int,input().split())
red=[]
blue=[]
for i in range(H):
  A=list(map(int,input().split()))
  red.append(A)
for i in range(H):
  B=list(map(int,input().split()))
  blue.append(B)
list=[[[0 for i in range(12801)] for j in range(W)] for k in range(H)]
list[0][0][abs(red[0][0]-blue[0][0])]=1
for i in range(H):
  for j in range(W):
    for k in range(12801):
      if list[i][j][k]==1:
        if i+1<H:
          if abs(k-abs(red[i+1][j]-blue[i+1][j]))<12801: 
            list[i+1][j][abs(k-abs(red[i+1][j]-blue[i+1][j]))]=1
          if abs(k+abs(red[i+1][j]-blue[i+1][j]))<12801: 
            list[i+1][j][abs(k+abs(red[i+1][j]-blue[i+1][j]))]=1
        if j+1<W:
          if abs(k-abs(red[i][j+1]-blue[i][j+1]))<12801: 
            list[i][j+1][abs(k-abs(red[i][j+1]-blue[i][j+1]))]=1
          if abs(k+abs(red[i][j+1]-blue[i][j+1]))<12801: 
            list[i][j+1][abs(k+abs(red[i][j+1]-blue[i][j+1]))]=1           
for i in range(12801):
  if list[H-1][W-1][i]==1:
    print(i)
    break

Fixed submission:
H,W=map(int,input().split())
red=[]
blue=[]
for i in range(H):
  A=list(map(int,input().split()))
  red.append(A)
for i in range(H):
  B=list(map(int,input().split()))
  blue.append(B)
list=[[[0 for i in range(80*(j+k+1)+1)] for j in range(W)] for k in range(H)]
list[0][0][abs(red[0][0]-blue[0][0])]=1
for i in range(H):
  for j in range(W):
    for k in range(len(list[i][j])):
      if list[i][j][k]==1:
        if i+1<H:
          if abs(k-abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k-abs(red[i+1][j]-blue[i+1][j]))]=1
          if abs(k+abs(red[i+1][j]-blue[i+1][j]))<=80*(i+j+2): 
            list[i+1][j][abs(k+abs(red[i+1][j]-blue[i+1][j]))]=1
        if j+1<W:
          if abs(k-abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k-abs(red[i][j+1]-blue[i][j+1]))]=1
          if abs(k+abs(red[i][j+1]-blue[i][j+1]))<=80*(i+j+2): 
            list[i][j+1][abs(k+abs(red[i][j+1]-blue[i][j+1]))]=1           
for i in range(12801):
  if list[H-1][W-1][i]==1:
    print(i)
    break