Buggy python submission (verdict: Runtime Error):
import sys
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp=[[0]*W for _ in range(H)]
    dp[0][0]=1<<D[0][0]<<20000

    for h in range(H):
        for w in range(W):
            if(h>0):
                dp[h][w] |= dp[h-1][w]<<D[h][w]
                dp[h][w] |= dp[h-1][w]>>D[h][w]
            if(w>0):
                dp[h][w] |= dp[h][w-1]<<D[h][w]
                dp[h][w] |= dp[h][w-1]>>D[h][w]
    for i in range(81):
        bit = 1<<(20000+i)
        bit |= 1<<(20000-i)
        if dp[H-1][W-1]&bit
            return(i)
 
if __name__ == "__main__":
    print(main())


Fixed submission:
import sys
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp=[[0]*W for _ in range(H)]
    dp[0][0]=1<<D[0][0]<<20000

    for h in range(H):
        for w in range(W):
            if(h>0):
                dp[h][w] |= dp[h-1][w]<<D[h][w]
                dp[h][w] |= dp[h-1][w]>>D[h][w]
            if(w>0):
                dp[h][w] |= dp[h][w-1]<<D[h][w]
                dp[h][w] |= dp[h][w-1]>>D[h][w]
    for i in range(81):
        bit = 1<<(20000+i)
        bit |= 1<<(20000-i)
        if dp[H-1][W-1]&bit:
            return(i)
 
if __name__ == "__main__":
    print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import sys
def LI(): return([int(x) for x in sys.stdin.readline().split()])
 
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp = [[set() for w in range(W)] for h in range(H)]

    dp[0][0].add(D[0][0]) 

    for h in range(H):
        for w in range(W):
            if(h>0):
                for s in dp[h-1][w]:
                    dp[h][w].add(abs(s-D[h][w]))
                    if s<=6400:
                        dp[h][w].add(s+D[h][w])
            if(w>0):
                for s in dp[h][w-1]:
                    dp[h][w].add(abs(s-D[h][w]))
                    if s<=6400:
                        dp[h][w].add(s+D[h][w])
    return(min(dp[H-1][W-1]))
 
if __name__ == "__main__":
    print(main())



Fixed submission:
import sys
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp=[[0]*W for _ in range(H)]
    dp[0][0]=1<<D[0][0]<<20000

    for h in range(H):
        for w in range(W):
            if(h>0):
                dp[h][w] |= dp[h-1][w]<<D[h][w]
                dp[h][w] |= dp[h-1][w]>>D[h][w]
            if(w>0):
                dp[h][w] |= dp[h][w-1]<<D[h][w]
                dp[h][w] |= dp[h][w-1]>>D[h][w]
    for i in range(81):
        bit = 1<<(20000+i)
        bit |= 1<<(20000-i)
        if dp[H-1][W-1]&bit:
            return(i)
 
if __name__ == "__main__":
    print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import heapq
import bisect
 
mod = 10**9+7
 
def I(): return(int(sys.stdin.readline()))
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def S(): return(list(sys.stdin.readline())[:-1])
 
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp = [[[False for _ in range(6401)] for w in range(W)] for h in range(H)]

    dp[0][0][D[0][0]] = True

    for h in range(1,H):
        for i in range(6401):
            if dp[h-1][0][i]:
                dp[h][0][abs(i-D[h][0])] = True
                if i+D[h][0]<6401:
                    dp[h][0][i+D[h][0]] = True
    for w in range(1,W):
        for i in range(6401):
            if dp[0][w-1][i]:
                dp[0][w][abs(i-D[0][w])] = True
                if i+D[0][w]<6401:
                    dp[0][w][i+D[0][w]] = True

    for h in range(1,H):
        for w in range(1,W):
            for i in range(6401):
                if dp[h-1][w][i]:
                    dp[h][w][abs(i-D[h][w])] = True
                    if i+D[h][w]<6401:
                        dp[h][w][i+D[h][w]] = True
                if dp[h][w-1][i]:
                    dp[h][w][abs(i-D[h][w])] = True
                    if i+D[h][w]<6401:
                        dp[h][w][i+D[h][w]] = True

    ans = 6400
    for i in range(6401):
        if dp[H-1][W-1][i]:
            ans = min(ans,i)
    return(ans)
 
if __name__ == "__main__":
    print(main())


Fixed submission:
import sys
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp=[[0]*W for _ in range(H)]
    dp[0][0]=1<<D[0][0]<<20000

    for h in range(H):
        for w in range(W):
            if(h>0):
                dp[h][w] |= dp[h-1][w]<<D[h][w]
                dp[h][w] |= dp[h-1][w]>>D[h][w]
            if(w>0):
                dp[h][w] |= dp[h][w-1]<<D[h][w]
                dp[h][w] |= dp[h][w-1]>>D[h][w]
    for i in range(81):
        bit = 1<<(20000+i)
        bit |= 1<<(20000-i)
        if dp[H-1][W-1]&bit:
            return(i)
 
if __name__ == "__main__":
    print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import heapq
import bisect
 
mod = 10**9+7
 
def I(): return(int(sys.stdin.readline()))
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def S(): return(list(sys.stdin.readline())[:-1])
 
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp = [[set() for w in range(W)] for h in range(H)]

    dp[0][0].add(D[0][0]) 

    for h in range(H):
        for w in range(W):
            if(h>0):
                for s in dp[h-1][w]:
                    dp[h][w].add(abs(s+D[h][w]))
                    dp[h][w].add(abs(s-D[h][w]))
            if(w>0):
                for s in dp[h][w-1]:
                    dp[h][w].add(abs(s+D[h][w]))
                    dp[h][w].add(abs(s-D[h][w]))
    return(min(dp[H-1][W-1]))
 
if __name__ == "__main__":
    print(main())


Fixed submission:
import sys
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp=[[0]*W for _ in range(H)]
    dp[0][0]=1<<D[0][0]<<20000

    for h in range(H):
        for w in range(W):
            if(h>0):
                dp[h][w] |= dp[h-1][w]<<D[h][w]
                dp[h][w] |= dp[h-1][w]>>D[h][w]
            if(w>0):
                dp[h][w] |= dp[h][w-1]<<D[h][w]
                dp[h][w] |= dp[h][w-1]>>D[h][w]
    for i in range(81):
        bit = 1<<(20000+i)
        bit |= 1<<(20000-i)
        if dp[H-1][W-1]&bit:
            return(i)
 
if __name__ == "__main__":
    print(main())

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import heapq
import bisect
 
mod = 10**9+7
 
def I(): return(int(sys.stdin.readline()))
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def S(): return(list(sys.stdin.readline())[:-1])
 
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[A[h][w]-B[h][w] for w in range(W)] for h in range(H)]
    dp = [[[False for _ in range(26000)] for w in range(W)] for h in range(H)]

    dp[0][0][D[0][0]+13000] = True

    for h in range(H):
        for w in range(W):
            if(h>0):
                for i in range(26000):
                    if dp[h-1][w][i]:
                        dp[h][w][i+D[h][w]] = True
                        dp[h][w][i-D[h][w]] = True
            if(w>0):
                for i in range(26000):
                    if dp[h][w-1][i]:
                        dp[h][w][i+D[h][w]] = True
                        dp[h][w][i-D[h][w]] = True

    ans = 30000
    for i in range(26000):
        if dp[H-1][W-1][i]:
            ans = min(ans,abs(i-13000))
    return(ans)
 
if __name__ == "__main__":
    print(main())


Fixed submission:
import sys
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def main():
    H,W = LI()
    A = [LI() for _ in range(H)]
    B = [LI() for _ in range(H)]
    D = [[abs(A[h][w]-B[h][w]) for w in range(W)] for h in range(H)]
    dp=[[0]*W for _ in range(H)]
    dp[0][0]=1<<D[0][0]<<20000

    for h in range(H):
        for w in range(W):
            if(h>0):
                dp[h][w] |= dp[h-1][w]<<D[h][w]
                dp[h][w] |= dp[h-1][w]>>D[h][w]
            if(w>0):
                dp[h][w] |= dp[h][w-1]<<D[h][w]
                dp[h][w] |= dp[h][w-1]>>D[h][w]
    for i in range(81):
        bit = 1<<(20000+i)
        bit |= 1<<(20000-i)
        if dp[H-1][W-1]&bit:
            return(i)
 
if __name__ == "__main__":
    print(main())