Buggy python submission (verdict: Time Limit Exceeded):
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    base = [[None]*W for _ in range(H)]
    for h in range(H):
        for w in range(W):
            base[h][w] = abs(A[h][w]-B[h][w])

    table = [[0 for _ in range(W)] for _ in range(H)]
    table[0][0] |= (1 << base[0][0])
    for h in range(H):
        for w in range(W):
            if h > 0:
                for i in range(6401):
                    j = (table[h-1][w] >> i) & 1
                    if j == 0:
                        continue
                    if base[h][w]+i < 6401:
                        table[h][w] |= 1 << abs(i+base[h][w])
                    table[h][w] |= 1 << abs(i-base[h][w])
            if w > 0:
                for i in range(6401):
                    j = (table[h][w-1] >> i) & 1
                    if j == 0:
                        continue
                    if base[h][w]+i < 6401:
                        table[h][w] |= 1 << abs(i+base[h][w])
                    table[h][w] |= 1 << abs(i-base[h][w])
    for j in range(6401):
        i = (table[H-1][W-1] >> j) & 1
        if i == 1:
            print(j)
            return

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    base = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    mx = (1 << 12800) - 1
    table = [[0]*W for _ in range(H)]
    table[0][0] = (1 << (6400 + base[0][0])) | (1 << (6400-base[0][0]))
    for h in range(H):
        for w in range(W):
            if h > 0:
                table[h][w] |= (table[h-1][w] << base[h][w])
                table[h][w] |= (table[h-1][w] >> base[h][w])
            if w > 0:
                table[h][w] |= (table[h][w-1] << base[h][w])
                table[h][w] |= (table[h][w-1] >> base[h][w])
            table[h][w] &= mx

    m = INF
    for j in range(12800):
        i = (table[H-1][W-1] >> j) & 1
        if i == 1:
            m = min(m, abs(j-6400))
    print(m)
    # print(table[H-1])

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    base = [[None]*W for _ in range(H)]
    for h in range(H):
        for w in range(W):
            base[h][w] = A[h][w]-B[h][w]

    table = [[set() for _ in range(W)] for _ in range(H)]
    table[0][0].add(base[0][0])
    for h in range(H):
        for w in range(W):
            if h > 0:
                for i in table[h-1][w]:
                    if base[h][w]+i < 160*80:
                        table[h][w].add(abs(i+base[h][w]))
                    table[h][w].add(abs(i-base[h][w]))
            if w > 0:
                for i in table[h][w-1]:
                    if base[h][w]+i < 160*80:
                        table[h][w].add(abs(i+base[h][w]))
                    table[h][w].add(abs(i-base[h][w]))
    print(min(table[H-1][W-1]))

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    base = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    mx = (1 << 12800) - 1
    table = [[0]*W for _ in range(H)]
    table[0][0] = (1 << (6400 + base[0][0])) | (1 << (6400-base[0][0]))
    for h in range(H):
        for w in range(W):
            if h > 0:
                table[h][w] |= (table[h-1][w] << base[h][w])
                table[h][w] |= (table[h-1][w] >> base[h][w])
            if w > 0:
                table[h][w] |= (table[h][w-1] << base[h][w])
                table[h][w] |= (table[h][w-1] >> base[h][w])
            table[h][w] &= mx

    m = INF
    for j in range(12800):
        i = (table[H-1][W-1] >> j) & 1
        if i == 1:
            m = min(m, abs(j-6400))
    print(m)
    # print(table[H-1])

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    L = 160*80
    base = [[None]*W for _ in range(H)]
    for h in range(H):
        for w in range(W):
            base[h][w] = abs(A[h][w]-B[h][w])

    table = [[set() for _ in range(W)] for _ in range(H)]
    table[0][0].add(base[0][0])
    table[0][0].add(-base[0][0])
    for h in range(H):
        for w in range(W):
            if h > 0:
                for i in table[h-1][w]:
                    table[h][w].add(abs(i+base[h][w]))
                    table[h][w].add(abs(i-base[h][w]))
            if w > 0:
                for i in table[h][w-1]:
                    table[h][w].add(abs(i+base[h][w]))
                    table[h][w].add(abs(i-base[h][w]))
    print(min(table[H-1][W-1]))

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    base = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    mx = (1 << 12800) - 1
    table = [[0]*W for _ in range(H)]
    table[0][0] = (1 << (6400 + base[0][0])) | (1 << (6400-base[0][0]))
    for h in range(H):
        for w in range(W):
            if h > 0:
                table[h][w] |= (table[h-1][w] << base[h][w])
                table[h][w] |= (table[h-1][w] >> base[h][w])
            if w > 0:
                table[h][w] |= (table[h][w-1] << base[h][w])
                table[h][w] |= (table[h][w-1] >> base[h][w])
            table[h][w] &= mx

    m = INF
    for j in range(12800):
        i = (table[H-1][W-1] >> j) & 1
        if i == 1:
            m = min(m, abs(j-6400))
    print(m)
    # print(table[H-1])

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Time Limit Exceeded):
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    L = 160*80*2
    base = [[None]*W for _ in range(H)]
    for h in range(H):
        for w in range(W):
            base[h][w] = abs(A[h][w]-B[h][w])

    table = [[[False]*L for _ in range(W)] for _ in range(H)]
    table[0][0][base[0][0]] = True
    for h in range(H):
        for w in range(W):
            for i in range(L):
                a = abs(i-base[h][w])
                b = abs(i+base[h][w])
                if h > 0 and table[h-1][w][i] == True:
                    table[h][w][a] = True
                    table[h][w][b] = True
                if w > 0 and table[h][w-1][i] == True:
                    table[h][w][a] = True
                    table[h][w][b] = True
    for i in range(L):
        if table[H-1][W-1][i] == True:
            print(i)
            return

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    base = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    mx = (1 << 12800) - 1
    table = [[0]*W for _ in range(H)]
    table[0][0] = (1 << (6400 + base[0][0])) | (1 << (6400-base[0][0]))
    for h in range(H):
        for w in range(W):
            if h > 0:
                table[h][w] |= (table[h-1][w] << base[h][w])
                table[h][w] |= (table[h-1][w] >> base[h][w])
            if w > 0:
                table[h][w] |= (table[h][w-1] << base[h][w])
                table[h][w] |= (table[h][w-1] >> base[h][w])
            table[h][w] &= mx

    m = INF
    for j in range(12800):
        i = (table[H-1][W-1] >> j) & 1
        if i == 1:
            m = min(m, abs(j-6400))
    print(m)
    # print(table[H-1])

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    L = 5000
    base = [[None]*W for _ in range(H)]
    for h in range(H):
        for w in range(W):
            base[h][w] = abs(A[h][w]-B[h][w])

    table = [[[False]*L for _ in range(W)] for _ in range(H)]
    table[0][0][base[0][0]] = True
    for h in range(H):
        for w in range(W):
            if h > 0:
                for i in range(L):
                    if table[h-1][w][i] == True:
                        table[h][w][abs(i-base[h][w])] = True
                        table[h][w][abs(i+base[h][w])] = True
            if w > 0:
                for i in range(L):
                    if table[h][w-1][i] == True:
                        table[h][w][abs(i-base[h][w])] = True
                        table[h][w][abs(i+base[h][w])] = True
    for i in range(L):
        if table[H-1][W-1][i] == True:
            print(i)
            return

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()


Fixed submission:
#!/usr/bin/env python3
import sys
INF = float("inf")


def solve(H: int, W: int, A: "List[List[int]]", B: "List[List[int]]"):
    base = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    mx = (1 << 12800) - 1
    table = [[0]*W for _ in range(H)]
    table[0][0] = (1 << (6400 + base[0][0])) | (1 << (6400-base[0][0]))
    for h in range(H):
        for w in range(W):
            if h > 0:
                table[h][w] |= (table[h-1][w] << base[h][w])
                table[h][w] |= (table[h-1][w] >> base[h][w])
            if w > 0:
                table[h][w] |= (table[h][w-1] << base[h][w])
                table[h][w] |= (table[h][w-1] >> base[h][w])
            table[h][w] &= mx

    m = INF
    for j in range(12800):
        i = (table[H-1][W-1] >> j) & 1
        if i == 1:
            m = min(m, abs(j-6400))
    print(m)
    # print(table[H-1])

    return


def main():

    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    H = int(next(tokens))  # type: int
    W = int(next(tokens))  # type: int
    A = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    B = [[int(next(tokens)) for _ in range(W)]
         for _ in range(H)]  # type: "List[List[int]]"
    solve(H, W, A, B)


if __name__ == '__main__':
    main()