Buggy python submission (verdict: Time Limit Exceeded):
H,W = map(int,input().split())
A=[]
x=[0]*(W+2)
A.append(x)
for i in range(H):
    a=list(map(int,input().split()))
    A.append([0]+a+[0])
A.append(x)
#print(A)

for i in range(H):
    b=list(map(int,input().split()))
    for j in range(W):
        A[i+1][j+1] = abs(A[i+1][j+1]-b[j])
        
#print(A)

L=[[set() for i in range(W+2)] for j in range(H+2)]
L[1][1].add(abs(A[1][1]))
#print(L)
#print(L[0][0])
for i in range(1,H+1):
    for j in range(1,W+1):
        #L[i][j]=list(L[i][j])
        for x in L[i][j]:
            if abs(x+A[i][j+1])<=6400:
                L[i][j+1].add(abs(x+A[i][j+1]))
            if abs(x-A[i][j+1])<=6400:
                L[i][j+1].add(abs(x-A[i][j+1]))
            if abs(x+A[i+1][j])<=6400:
                L[i+1][j].add(abs(x+A[i+1][j]))
            if abs(x-A[i+1][j])<=6400:
                L[i+1][j].add(abs(x-A[i+1][j]))
#print(L)

ans=10**5
L[H][W]=list(L[H][W])
for k in L[H][W]:
    if k<ans:
        ans=k
print(ans)


Fixed submission:
H,W=map(int,input().split())
A=[]
A.append([0 for i in range(W+1)])
for i in range(H):
    a=[0]+list(map(int,input().split()))
    A.append(a)
B=[]
B.append([0 for i in range(W+1)])
for i in range(H):
    b=[0]+list(map(int,input().split()))
    B.append(b)
C=[[0 for i in range(W+1)]for j in range(H+1)]
for i in range(H+1):
    for j in range(W+1):
        C[i][j]=abs(A[i][j]-B[i][j])
        
ST=1<<80*160+1

dp=[[0 for i in range(W+1)]for j in range(H+1)]
dp[0][1]=ST
for i in range(1,H+1):
    for j in range(1,W+1):
        dp[i][j] |= (dp[i-1][j]<<C[i][j]) |(dp[i-1][j]>>C[i][j])
        dp[i][j] |= (dp[i][j-1]<<C[i][j]) |(dp[i][j-1]>>C[i][j])
#print(bin(dp[-1][-1]>>7))
ANS=list(bin(dp[-1][-1]>>80*160+1))[::-1]
#print(ANS)
for i in range(len(ANS)):
    if ANS[i]=="1":
        print(i)
        exit()

Buggy python submission (verdict: Time Limit Exceeded):
H,W = map(int,input().split())
A=[]
x=[0]*(W+2)
A.append(x)
for i in range(H):
    a=list(map(int,input().split()))
    A.append([0]+a+[0])
A.append(x)
#print(A)

for i in range(H):
    b=list(map(int,input().split()))
    for j in range(W):
        A[i+1][j+1] = abs(A[i+1][j+1]-b[j])
        
#print(A)

L=[[set() for i in range(W+2)] for j in range(H+2)]
L[1][1].add(abs(A[1][1]))
#print(L)
#print(L[0][0])
for i in range(1,H+1):
    for j in range(1,W+1):
        L[i][j]=list(L[i][j])
        for x in L[i][j]:
            L[i][j+1].add(abs(x+A[i][j+1]))
            L[i][j+1].add(abs(x-A[i][j+1]))
            L[i+1][j].add(abs(x+A[i+1][j]))
            L[i+1][j].add(abs(x-A[i+1][j]))
#print(L)

ans=10**5
L[H][W]=list(L[H][W])
for k in L[H][W]:
    if k<ans:
        ans=k
print(ans)

Fixed submission:
H,W=map(int,input().split())
A=[]
A.append([0 for i in range(W+1)])
for i in range(H):
    a=[0]+list(map(int,input().split()))
    A.append(a)
B=[]
B.append([0 for i in range(W+1)])
for i in range(H):
    b=[0]+list(map(int,input().split()))
    B.append(b)
C=[[0 for i in range(W+1)]for j in range(H+1)]
for i in range(H+1):
    for j in range(W+1):
        C[i][j]=abs(A[i][j]-B[i][j])
        
ST=1<<80*160+1

dp=[[0 for i in range(W+1)]for j in range(H+1)]
dp[0][1]=ST
for i in range(1,H+1):
    for j in range(1,W+1):
        dp[i][j] |= (dp[i-1][j]<<C[i][j]) |(dp[i-1][j]>>C[i][j])
        dp[i][j] |= (dp[i][j-1]<<C[i][j]) |(dp[i][j-1]>>C[i][j])
#print(bin(dp[-1][-1]>>7))
ANS=list(bin(dp[-1][-1]>>80*160+1))[::-1]
#print(ANS)
for i in range(len(ANS)):
    if ANS[i]=="1":
        print(i)
        exit()

Buggy python submission (verdict: Time Limit Exceeded):
H,W = map(int,input().split())
A=[]
x=[0]*(W+2)
A.append(x)
for i in range(H):
    a=list(map(int,input().split()))
    A.append([0]+a+[0])
A.append(x)
#print(A)

for i in range(H):
    b=list(map(int,input().split()))
    for j in range(W):
        A[i+1][j+1] = abs(A[i+1][j+1]-b[j])
        
#print(A)

L=[[{} for i in range(W+2)] for j in range(H+2)]
L[1][1][A[1][1]]=1
L[1][1][-A[1][1]]=1
#print(L)
#print(L[0][0])
for i in range(1,H+1):
    for j in range(1,W+1):
        for x,y in L[i][j].items():
            #print(x+A[i][j+1])
            if abs(x+A[i][j+1]) not in L[i][j+1] and abs(x+A[i][j+1])<=6400:
                L[i][j+1][abs(x+A[i][j+1])]=1
            if abs(x-A[i][j+1]) not in L[i][j+1] and abs(x-A[i][j+1])<=6400:
                L[i][j+1][abs(x-A[i][j+1])]=1
            if abs(x+A[i+1][j]) not in L[i+1][j] and abs(x+A[i+1][j])<=6400:
                L[i+1][j][abs(x+A[i+1][j])]=1
            if abs(x-A[i+1][j]) not in L[i+1][j] and abs(x-A[i+1][j])<=6400:
                L[i+1][j][abs(x-A[i+1][j])]=1
#print(L)

ans=10**5
for k,v in L[H][W].items():
    if abs(k)<ans:
        ans=abs(k)
print(ans)

Fixed submission:
H,W=map(int,input().split())
A=[]
A.append([0 for i in range(W+1)])
for i in range(H):
    a=[0]+list(map(int,input().split()))
    A.append(a)
B=[]
B.append([0 for i in range(W+1)])
for i in range(H):
    b=[0]+list(map(int,input().split()))
    B.append(b)
C=[[0 for i in range(W+1)]for j in range(H+1)]
for i in range(H+1):
    for j in range(W+1):
        C[i][j]=abs(A[i][j]-B[i][j])
        
ST=1<<80*160+1

dp=[[0 for i in range(W+1)]for j in range(H+1)]
dp[0][1]=ST
for i in range(1,H+1):
    for j in range(1,W+1):
        dp[i][j] |= (dp[i-1][j]<<C[i][j]) |(dp[i-1][j]>>C[i][j])
        dp[i][j] |= (dp[i][j-1]<<C[i][j]) |(dp[i][j-1]>>C[i][j])
#print(bin(dp[-1][-1]>>7))
ANS=list(bin(dp[-1][-1]>>80*160+1))[::-1]
#print(ANS)
for i in range(len(ANS)):
    if ANS[i]=="1":
        print(i)
        exit()

Buggy python submission (verdict: Time Limit Exceeded):
H,W = map(int,input().split())
A=[]
x=[0]*(W+2)
A.append(x)
for i in range(H):
    a=list(map(int,input().split()))
    A.append([0]+a+[0])
A.append(x)
#print(A)

for i in range(H):
    b=list(map(int,input().split()))
    for j in range(W):
        A[i+1][j+1] = abs(A[i+1][j+1]-b[j])
        
#print(A)

L=[[{} for i in range(W+2)] for j in range(H+2)]
L[1][1][A[1][1]]=1
L[1][1][-A[1][1]]=1
#print(L)
#print(L[0][0])
for i in range(1,H+1):
    for j in range(1,W+1):
        for x,y in L[i][j].items():
            #print(x+A[i][j+1])
            if abs(x+A[i][j+1]) not in L[i][j+1]:
                L[i][j+1][abs(x+A[i][j+1])]=1
            if abs(x-A[i][j+1]) not in L[i][j+1]:
                L[i][j+1][abs(x-A[i][j+1])]=1
            if abs(x+A[i+1][j]) not in L[i+1][j]:
                L[i+1][j][abs(x+A[i+1][j])]=1
            if abs(x-A[i+1][j]) not in L[i+1][j]:
                L[i+1][j][abs(x-A[i+1][j])]=1
#print(L)

ans=10**5
for k,v in L[H][W].items():
    if abs(k)<ans:
        ans=abs(k)
print(ans)

Fixed submission:
H,W=map(int,input().split())
A=[]
A.append([0 for i in range(W+1)])
for i in range(H):
    a=[0]+list(map(int,input().split()))
    A.append(a)
B=[]
B.append([0 for i in range(W+1)])
for i in range(H):
    b=[0]+list(map(int,input().split()))
    B.append(b)
C=[[0 for i in range(W+1)]for j in range(H+1)]
for i in range(H+1):
    for j in range(W+1):
        C[i][j]=abs(A[i][j]-B[i][j])
        
ST=1<<80*160+1

dp=[[0 for i in range(W+1)]for j in range(H+1)]
dp[0][1]=ST
for i in range(1,H+1):
    for j in range(1,W+1):
        dp[i][j] |= (dp[i-1][j]<<C[i][j]) |(dp[i-1][j]>>C[i][j])
        dp[i][j] |= (dp[i][j-1]<<C[i][j]) |(dp[i][j-1]>>C[i][j])
#print(bin(dp[-1][-1]>>7))
ANS=list(bin(dp[-1][-1]>>80*160+1))[::-1]
#print(ANS)
for i in range(len(ANS)):
    if ANS[i]=="1":
        print(i)
        exit()