Buggy python submission (verdict: Runtime Error):
H, W = [int(x) for x in input().split()] A = [[0]*W for i in range(H)] for c in [1, -1]: for i in range(H): arr = [int(x) for x in input().split()] for j in range(W): A[i][j] += arr[j] * c M = 160*80 dp = [[0]*W for i in range(H)] dp[0][0] = 1 << M for i in range(H): for j in range(W): if i > 0: dp[i][j] |= dp[i-1][j] if j > 0: dp[i][j] |= dp[i][j-1] a = abs(A[i][j]) dp[i][j] = (dp[i][j] << a) | (dp[i][j] >> a) ans = M for i in range(2*M): if dp[H-1][W-1] & (1 << i) > 0: ans = min(ans, abs(M-i)) print(ans)


Fixed submission:
H, W = [int(x) for x in input().split()]
 
A = [[0]*W for i in range(H)]
for c in [1, -1]:
    for i in range(H):
        arr = [int(x) for x in input().split()]
        for j in range(W):
            A[i][j] += arr[j] * c
 
M = 160*80
dp = [[0]*W for i in range(H)]
dp[0][0] = 1 << M
for i in range(H):
    for j in range(W):
        if i > 0:
            dp[i][j] |= dp[i-1][j]
        if j > 0:
            dp[i][j] |= dp[i][j-1]
        a = abs(A[i][j])
        dp[i][j] = (dp[i][j] << a) | (dp[i][j] >> a)
 
ans = M
for i in range(2*M):
    if dp[H-1][W-1] & (1 << i) > 0:
        ans = min(ans, abs(M-i))
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
h,w = map(int,input().split())
mp = {}
for i in range(2):
    for j in range(h):
        tmp = input().split()
        for k in range(w):
            mp[(k,j,i)] = int(tmp[k])
mp2 = {}
for i in range(h):
    for j in range(w):
        mp2[(j,i)] = abs(mp[(j,i,0)]-mp[(j,i,1)])

mp3 = [[set() for e in range(h)] for i in range(w)]
mp3[0][0].add(mp2[(0,0)])
# print(mp3)
for i in range(w):
    for j in range(h):
        for k in mp3[i][j]:
            if i < w -1:
                a = mp2[(i+1,j)]
                mp3[i+1][j].add(abs(k-a))
                mp3[i+1][j].add(abs(k+a))
            if j < h -1:
                a = mp2[(i,j+1)]
                mp3[i][j+1].add(abs(k-a))
                mp3[i][j+1].add(abs(k+a))
print(min(mp3[w-1][h-1]))


Fixed submission:
H, W = [int(x) for x in input().split()]
 
A = [[0]*W for i in range(H)]
for c in [1, -1]:
    for i in range(H):
        arr = [int(x) for x in input().split()]
        for j in range(W):
            A[i][j] += arr[j] * c
 
M = 160*80
dp = [[0]*W for i in range(H)]
dp[0][0] = 1 << M
for i in range(H):
    for j in range(W):
        if i > 0:
            dp[i][j] |= dp[i-1][j]
        if j > 0:
            dp[i][j] |= dp[i][j-1]
        a = abs(A[i][j])
        dp[i][j] = (dp[i][j] << a) | (dp[i][j] >> a)
 
ans = M
for i in range(2*M):
    if dp[H-1][W-1] & (1 << i) > 0:
        ans = min(ans, abs(M-i))
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
h,w = map(int,input().split())
mp = {}
for i in range(2):
    for j in range(h):
        tmp = input().split()
        for k in range(w):
            mp[(k,j,i)] = int(tmp[k])
mp2 = {}
for i in range(h):
    for j in range(w):
        mp2[(j,i)] = abs(mp[(j,i,0)]-mp[(j,i,1)])

mp3 = [[set() for e in range(h)] for i in range(w)]
mp3[0][0].add(mp2[(0,0)])
# print(mp3)
for i in range(w):
    for j in range(h):
        for k in mp3[i][j]:
            if i < w -1:
                a = mp2[(i+1,j)]
                mp3[i+1][j].add(abs(k-a))
                mp3[i+1][j].add(abs(k+a))
            if j < h -1:
                a = mp2[(i,j+1)]
                mp3[i][j+1].add(abs(k-a))
                mp3[i][j+1].add(abs(k+a))
print(min(mp3[w-1][h-1]))


Fixed submission:
H, W = [int(x) for x in input().split()]
 
A = [[0]*W for i in range(H)]
for c in [1, -1]:
    for i in range(H):
        arr = [int(x) for x in input().split()]
        for j in range(W):
            A[i][j] += arr[j] * c
 
M = 160*80
dp = [[0]*W for i in range(H)]
dp[0][0] = 1 << M
for i in range(H):
    for j in range(W):
        if i > 0:
            dp[i][j] |= dp[i-1][j]
        if j > 0:
            dp[i][j] |= dp[i][j-1]
        a = abs(A[i][j])
        dp[i][j] = (dp[i][j] << a) | (dp[i][j] >> a)
 
ans = M
for i in range(2*M):
    if dp[H-1][W-1] & (1 << i) > 0:
        ans = min(ans, abs(M-i))
print(ans)