Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline

def main():
    H, W = map(int, input().split())
    P = W+1
    A = [list(map(int, input().split())) for _ in range(H)]
    B = [list(map(int, input().split())) for _ in range(H)]
    L = 80*80
    dp = [[False]*(L+1) for _ in range((W+1)*(H+1))]
    for h in range(H+1):
        dp[h*P][0] = True
    for w in range(H+1):
        dp[w][0] = True
    
    for h in range(H):
        for w in range(W):
            c = abs(A[h][w] - B[h][w])
            for l in range(L+1):
                b1 = abs(l-c)
                b2 = abs(l+c)
                if b1 <= L:
                    dp[(h+1)*P+w+1][l] = dp[h*P+w+1][b1] or dp[(h+1)*P+w][b1]
                if b2 <= L:
                    dp[(h+1)*P+w+1][l] = dp[(h+1)*P+w+1][l] or dp[h*P+w+1][b2] or dp[(h+1)*P+w][b2]

    for l in range(L+1):
        if dp[H*P+W][l]:
            print(l)
            break


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline

def main():
    H, W = map(int, input().split())
    P = W+1
    A = [list(map(int, input().split())) for _ in range(H)]
    B = [list(map(int, input().split())) for _ in range(H)]
    L = 80*80
    dp = [[False]*(L+1) for _ in range((W+1)*(H+1))]
    dp[P+1][abs(A[0][0]-B[0][0])] = True
    
    for h in range(H):
        for w in range(W):
            if h == 0 and w == 0: continue
            c = abs(A[h][w] - B[h][w])
            for l in range(L-c+1):
                b1 = abs(l-c)
                b2 = abs(l+c)
                dp[(h+1)*P+w+1][l] = dp[h*P+w+1][b1] or dp[(h+1)*P+w][b1] or dp[h*P+w+1][b2] or dp[(h+1)*P+w][b2]

    for l in range(L+1):
        if dp[H*P+W][l]:
            print(l)
            break


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline

def main():
    H, W = map(int, input().split())
    P = W+1
    A = [list(map(int, input().split())) for _ in range(H)]
    B = [list(map(int, input().split())) for _ in range(H)]
    L = 80*80*2
    dp = [[False]*(L+1) for _ in range((W+1)*(H+1))]
    for h in range(H+1):
        dp[h*P][0] = True
    for w in range(H+1):
        dp[w][0] = True
    
    for h in range(H):
        for w in range(W):
            c = abs(A[h][w] - B[h][w])
            for l in range(L+1):
                b1 = abs(l-c)
                b2 = abs(l+c)
                if b1 <= L:
                    dp[(h+1)*P+w+1][l] = dp[h*P+w+1][b1] or dp[(h+1)*P+w][b1]
                if b2 <= L:
                    dp[(h+1)*P+w+1][l] = dp[(h+1)*P+w+1][l] or dp[h*P+w+1][b2] or dp[(h+1)*P+w][b2]

    for l in range(L+1):
        if dp[H*P+W][l]:
            print(l)
            break


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline

def main():
    H, W = map(int, input().split())
    P = W+1
    A = [list(map(int, input().split())) for _ in range(H)]
    B = [list(map(int, input().split())) for _ in range(H)]
    L = 80*80
    dp = [[False]*(L+1) for _ in range((W+1)*(H+1))]
    dp[P+1][abs(A[0][0]-B[0][0])] = True
    
    for h in range(H):
        for w in range(W):
            if h == 0 and w == 0: continue
            c = abs(A[h][w] - B[h][w])
            for l in range(L-c+1):
                b1 = abs(l-c)
                b2 = abs(l+c)
                dp[(h+1)*P+w+1][l] = dp[h*P+w+1][b1] or dp[(h+1)*P+w][b1] or dp[h*P+w+1][b2] or dp[(h+1)*P+w][b2]

    for l in range(L+1):
        if dp[H*P+W][l]:
            print(l)
            break


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline

def main():
    H, W = map(int, input().split())
    P = W+1
    A = [list(map(int, input().split())) for _ in range(H)]
    B = [list(map(int, input().split())) for _ in range(H)]
    L = 80*80*4
    mid = L//2
    dp = [[False]*(L+1) for _ in range((W+1)*(H+1))]
    for h in range(H+1):
        dp[h*P][mid] = True
    for w in range(H+1):
        dp[w][mid] = True
    
    for h in range(H):
        for w in range(W):
            c = A[h][w] - B[h][w]
            for l in range(L+1):
                if 0 <= l-c <= L:
                    dp[(h+1)*P+w+1][l] = dp[h*P+w+1][l-c] or dp[(h+1)*P+w][l-c]
                if 0 <= l+c <= L:
                    dp[(h+1)*P+w+1][l] = dp[(h+1)*P+w+1][l] or dp[h*P+w+1][l+c] or dp[(h+1)*P+w][l+c]
    ans = 10**9
    for l in range(L+1):
        if dp[H*P+W][l]:
            ans = min(abs(l-mid), ans)
    print(ans)


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline

def main():
    H, W = map(int, input().split())
    P = W+1
    A = [list(map(int, input().split())) for _ in range(H)]
    B = [list(map(int, input().split())) for _ in range(H)]
    L = 80*80
    dp = [[False]*(L+1) for _ in range((W+1)*(H+1))]
    dp[P+1][abs(A[0][0]-B[0][0])] = True
    
    for h in range(H):
        for w in range(W):
            if h == 0 and w == 0: continue
            c = abs(A[h][w] - B[h][w])
            for l in range(L-c+1):
                b1 = abs(l-c)
                b2 = abs(l+c)
                dp[(h+1)*P+w+1][l] = dp[h*P+w+1][b1] or dp[(h+1)*P+w][b1] or dp[h*P+w+1][b2] or dp[(h+1)*P+w][b2]

    for l in range(L+1):
        if dp[H*P+W][l]:
            print(l)
            break


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline

def main():
    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)]
    L = 80*80*4
    mid = L//2
    dp = [[[False]*(L+1) for _ in range(W+1)] for _ in range(H+1)]
    for h in range(H+1):
        dp[h][0][mid] = True
    for w in range(H+1):
        dp[0][w][mid] = True
    
    for h in range(H):
        for w in range(W):
            for l in range(L+1):
                c = A[h][w] - B[h][w]
                if 0 <= l-c <= L:
                    dp[h+1][w+1][l] = dp[h][w+1][l-c] or dp[h+1][w][l-c]
                if 0 <= l+c <= L:
                    dp[h+1][w+1][l] = dp[h+1][w+1][l] or dp[h][w+1][l+c] or dp[h+1][w][l+c]
    ans = 10**9
    for l in range(L+1):
        if dp[H][W][l]:
            ans = min(abs(l-mid), ans)
    print(ans)


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline

def main():
    H, W = map(int, input().split())
    P = W+1
    A = [list(map(int, input().split())) for _ in range(H)]
    B = [list(map(int, input().split())) for _ in range(H)]
    L = 80*80
    dp = [[False]*(L+1) for _ in range((W+1)*(H+1))]
    dp[P+1][abs(A[0][0]-B[0][0])] = True
    
    for h in range(H):
        for w in range(W):
            if h == 0 and w == 0: continue
            c = abs(A[h][w] - B[h][w])
            for l in range(L-c+1):
                b1 = abs(l-c)
                b2 = abs(l+c)
                dp[(h+1)*P+w+1][l] = dp[h*P+w+1][b1] or dp[(h+1)*P+w][b1] or dp[h*P+w+1][b2] or dp[(h+1)*P+w][b2]

    for l in range(L+1):
        if dp[H*P+W][l]:
            print(l)
            break


if __name__ == "__main__":
    main()