Buggy python submission (verdict: Time Limit Exceeded):
def solve():
    import numpy as np
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [dict() for i in range(W)]
    dp1[0][0] = True
    for A_i, B_i in zip(A, B):
        dp2 = [dict() for i in range(W)]
        
        diff = A_i[0] - B_i[0]
        for pre_bias in dp1[0]:
            dp2[0][abs(pre_bias + diff)] = True
            dp2[0][abs(pre_bias - diff)] = True
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = A_ij - B_ij
            for pre_bias in dp1[j]:
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
            for pre_bias in dp2[j-1]:
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
                
        dp1 = dp2
    
    print(min(dp2[-1]))
 
solve()

Fixed submission:
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [0] * W
    bit_width = 80 * (H + W - 2)
    dp1[0] = 1 << (bit_width)
    for A_i, B_i in zip(A, B):
        dp2 = [0] * W
        
        diff = abs(A_i[0] - B_i[0])
        dp2[0] = (dp1[0] << diff) | (dp1[0] >> diff)
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = abs(A_ij - B_ij)
            b = dp1[j] | dp2[j-1]
            dp2[j] = (b << diff) | (b >> diff)
        
        dp1 = dp2
    
    b = bin(dp2[-1])
    b = b[-bit_width-1:]
    print(b.index('1'))
 
solve()

Buggy python submission (verdict: Time Limit Exceeded):
def solve():
    import numpy as np
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    max_bias = 80 * (W - 1) * (H - 1)
    dp1 = np.full((W, max_bias), False)
    dp1[0][0] = True
    for A_i, B_i in zip(A, B):
        dp2 = np.full((W, max_bias), False)
        diff = A_i[0] - B_i[0]
        for pre_bias in np.where(dp1[0] == True)[0]:
            dp2[0][abs(pre_bias + diff)] = True
            dp2[0][abs(pre_bias - diff)] = True
            
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = A_ij - B_ij
            for pre_bias in np.where(dp1[j] == True)[0]:
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
            for pre_bias in np.where(dp2[j-1] == True)[0]:
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
        dp1 = dp2
    
    print(np.where(dp2[-1] == True)[0][0])
 
solve()

Fixed submission:
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [0] * W
    bit_width = 80 * (H + W - 2)
    dp1[0] = 1 << (bit_width)
    for A_i, B_i in zip(A, B):
        dp2 = [0] * W
        
        diff = abs(A_i[0] - B_i[0])
        dp2[0] = (dp1[0] << diff) | (dp1[0] >> diff)
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = abs(A_ij - B_ij)
            b = dp1[j] | dp2[j-1]
            dp2[j] = (b << diff) | (b >> diff)
        
        dp1 = dp2
    
    b = bin(dp2[-1])
    b = b[-bit_width-1:]
    print(b.index('1'))
 
solve()

Buggy python submission (verdict: Time Limit Exceeded):
def solve():
    import numpy as np
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    max_bias = 80 * (W - 1) * (H - 1)
    dp1 = np.full((W, max_bias), False)
    dp1[0][0] = True
    for A_i, B_i in zip(A, B):
        dp2 = np.full((W, max_bias), False)
        diff = A_i[0] - B_i[0]
        for pre_bias in np.where(dp1[0] == True):
            dp2[0][abs(pre_bias + diff)] = True
            dp2[0][abs(pre_bias - diff)] = True
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = A_ij - B_ij
            for pre_bias in np.where(dp1[j] == True):
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
            for pre_bias in np.where(dp2[j-1] == True):
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
        dp1 = dp2
    
    print(np.where(dp2[-1] == True)[0][0])#
 
solve()

Fixed submission:
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [0] * W
    bit_width = 80 * (H + W - 2)
    dp1[0] = 1 << (bit_width)
    for A_i, B_i in zip(A, B):
        dp2 = [0] * W
        
        diff = abs(A_i[0] - B_i[0])
        dp2[0] = (dp1[0] << diff) | (dp1[0] >> diff)
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = abs(A_ij - B_ij)
            b = dp1[j] | dp2[j-1]
            dp2[j] = (b << diff) | (b >> diff)
        
        dp1 = dp2
    
    b = bin(dp2[-1])
    b = b[-bit_width-1:]
    print(b.index('1'))
 
solve()

Buggy python submission (verdict: Runtime Error):
def solve():
    import numpy as np
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    DP = np.full((H + 1, W + 1, (H * W) * 80), False)
    DP[0][1][0] = True
    for i in range(1, H + 1):
        for j in range(1, W + 1):
            diff = A[i-1][j-1] - B[i-1][j-1]
            for pre_bias in np.where(DP[i-1][j] == True)[0]:
                bias = abs(pre_bias + diff)
                DP[i][j][bias] = True
                bias = abs(pre_bias - diff)
                DP[i][j][bias] = True
            for pre_bias in np.where(DP[i][j-1] == True)[0]:
                bias = abs(pre_bias + diff)
                DP[i][j][bias] = True
                bias = abs(pre_bias - diff)
                DP[i][j][bias] = True
    
    ans = np.where(DP[-1][-1] == True)[0][0]
    print(ans)

solve()

Fixed submission:
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [0] * W
    bit_width = 80 * (H + W - 2)
    dp1[0] = 1 << (bit_width)
    for A_i, B_i in zip(A, B):
        dp2 = [0] * W
        
        diff = abs(A_i[0] - B_i[0])
        dp2[0] = (dp1[0] << diff) | (dp1[0] >> diff)
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = abs(A_ij - B_ij)
            b = dp1[j] | dp2[j-1]
            dp2[j] = (b << diff) | (b >> diff)
        
        dp1 = dp2
    
    b = bin(dp2[-1])
    b = b[-bit_width-1:]
    print(b.index('1'))
 
solve()

Buggy python submission (verdict: Runtime Error):
def solve():
    import numpy as np
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    DP = np.full((H + 1, W + 1, (H * W) * 80), False)
    DP[0][1][0] = True
    for i in range(1, H + 1):
        for j in range(1, W + 1):
            diff = A[i-1][j-1] - B[i-1][j-1]
            for pre_bias in np.where(DP[i-1][j] == True):
                bias = abs(pre_bias + diff)
                DP[i][j][bias] = True
                bias = abs(pre_bias - diff)
                DP[i][j][bias] = True
            for pre_bias in np.where(DP[i][j-1] == True):
                bias = abs(pre_bias + diff)
                DP[i][j][bias] = True
                bias = abs(pre_bias - diff)
                DP[i][j][bias] = True
    
    b = np.where(DP[-1][-1] == True)[-1]
    print(min(b))

solve()

Fixed submission:
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [0] * W
    bit_width = 80 * (H + W - 2)
    dp1[0] = 1 << (bit_width)
    for A_i, B_i in zip(A, B):
        dp2 = [0] * W
        
        diff = abs(A_i[0] - B_i[0])
        dp2[0] = (dp1[0] << diff) | (dp1[0] >> diff)
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = abs(A_ij - B_ij)
            b = dp1[j] | dp2[j-1]
            dp2[j] = (b << diff) | (b >> diff)
        
        dp1 = dp2
    
    b = bin(dp2[-1])
    b = b[-bit_width-1:]
    print(b.index('1'))
 
solve()

Buggy python submission (verdict: Time Limit Exceeded):
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [dict() for i in range(W)]
    dp1[0][0] = True
    for A_i, B_i in zip(A, B):
        dp2 = [dict() for i in range(W)]
        diff = A_i[0] - B_i[0]
        for pre_bias in dp1[0]:
            dp2[0][abs(pre_bias + diff)] = True
            dp2[0][abs(pre_bias - diff)] = True
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = A_ij - B_ij
            for pre_bias in dp1[j]:
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
            for pre_bias in dp2[j-1]:
                dp2[j][abs(pre_bias + diff)] = True
                dp2[j][abs(pre_bias - diff)] = True
        dp1 = dp2
    
    print(min(dp2[-1]))

solve()

Fixed submission:
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [0] * W
    bit_width = 80 * (H + W - 2)
    dp1[0] = 1 << (bit_width)
    for A_i, B_i in zip(A, B):
        dp2 = [0] * W
        
        diff = abs(A_i[0] - B_i[0])
        dp2[0] = (dp1[0] << diff) | (dp1[0] >> diff)
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = abs(A_ij - B_ij)
            b = dp1[j] | dp2[j-1]
            dp2[j] = (b << diff) | (b >> diff)
        
        dp1 = dp2
    
    b = bin(dp2[-1])
    b = b[-bit_width-1:]
    print(b.index('1'))
 
solve()

Buggy python submission (verdict: Time Limit Exceeded):
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [set() for i in range(W)]
    dp1[0].add(0)
    for A_i, B_i in zip(A, B):
        dp2 = [set() for i in range(W)]
        diff = A_i[0] - B_i[0]
        for pre_bias in dp1[0]:
            dp2[0].add(pre_bias + diff)
            dp2[0].add(pre_bias - diff)
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = A_ij - B_ij
            for pre_bias in dp1[j]:
                dp2[j].add(pre_bias + diff)
                dp2[j].add(pre_bias - diff)
            for pre_bias in dp2[j-1]:
                dp2[j].add(pre_bias + diff)
                dp2[j].add(pre_bias - diff)
        dp1 = dp2
    
    ans = min(abs(x) for x in dp2[-1])
    print(ans)

solve()

Fixed submission:
def solve():
    from sys import stdin
    f_i = stdin
    
    H, W = map(int, f_i.readline().split())
    A = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    B = tuple(tuple(map(int, f_i.readline().split())) for i in range(H))
    
    dp1 = [0] * W
    bit_width = 80 * (H + W - 2)
    dp1[0] = 1 << (bit_width)
    for A_i, B_i in zip(A, B):
        dp2 = [0] * W
        
        diff = abs(A_i[0] - B_i[0])
        dp2[0] = (dp1[0] << diff) | (dp1[0] >> diff)
        
        for j, t in enumerate(zip(A_i[1:], B_i[1:]), start=1):
            A_ij, B_ij = t
            diff = abs(A_ij - B_ij)
            b = dp1[j] | dp2[j-1]
            dp2[j] = (b << diff) | (b >> diff)
        
        dp1 = dp2
    
    b = bin(dp2[-1])
    b = b[-bit_width-1:]
    print(b.index('1'))
 
solve()