Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

#mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
#import numpy as np

def main():
	h,w=map(int,input().split())
	
	G=[[0]*w for i in range(h)]
	
	for i in range(h):
		A=list(map(int,input().split()))
		for j in range(w):
			G[i][j]+=A[j]
	for i in range(h):
		B = list(map(int, input().split()))
		for j in range(w):
			G[i][j] =abs(G[i][j]-B[j])
	M=(h+w)*80
	
	li = [[[] for i in range(w)] for j in range(h)]
	for i in range(h):
		for j in range(w):
			if i == j == 0:
				li[i][j].append(G[i][j])
			elif i == 0:
				for k in li[i][j - 1]:
					aa = abs(k - G[i][j])
					bb = abs(k + G[i][j])
					if aa <= M:
						li[i][j].append(aa)
					if abs(bb) <= M:
						li[i][j].append(bb)
			elif j == 0:
				for k in li[i - 1][j]:
					aa = abs(k - G[i][j])
					bb = abs(k + G[i][j])
					if aa <= M:
						li[i][j].append(aa)
					if abs(bb) <= M:
						li[i][j].append(bb)
			else:
				for k in li[i - 1][j]:
					aa = abs(k - G[i][j])
					bb = abs(k + G[i][j])
					if aa <= M:
						li[i][j].append(aa)
					if abs(bb) <= M:
						li[i][j].append(bb)
				for k in li[i][j - 1]:
					aa = abs(k - G[i][j])
					bb = abs(k + G[i][j])
					if aa <= M:
						li[i][j].append(aa)
					if abs(bb) <= M:
						li[i][j].append(bb)
			
			s = set(li[i][j])
			li[i][j] = list(s)
	
	print(min(li[h - 1][w - 1]))


if __name__ == "__main__":
	main()

Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
import numpy as np

def main():
	h,w=map(int,input().split())
	AB=np.array(read().split(), np.int64)
	
	
	A=AB[:h*w]
	B=AB[h*w:]
	
	A=np.reshape(A, (h,w))
	B = np.reshape(B, (h, w))
	
	G=abs(A-B)
	M=(h+w)*80

	
	li=[[[0]*M for i in range(w)] for j in range(h)]

	
	li[0][0][G[0][0]]=1
	for i in range(h):
		for j in range(w):
			for k in range(M):

				if li[i][j][k]==1:
					if i<h-1:
						li[i + 1][j][abs(k - G[i][j])] = 1
						li[i + 1][j][abs(k + G[i][j])] = 1
					if j<w-1:
						li[i][j + 1][abs(k - G[i][j])] = 1
						li[i][j + 1][abs(k + G[i][j])] = 1

	
	for i in range(M):
		if li[h-1][w-1][i]==1:
			print(i-1)
			exit(0)
	
if __name__ == "__main__":
	main()


Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
import numpy as np

def main():
	h,w=map(int,input().split())
	AB=np.array(read().split(), np.int64)
	
	
	A=AB[:h*w]
	B=AB[h*w:]
	
	A=np.reshape(A, (h,w))
	B = np.reshape(B, (h, w))
	
	G=abs(A-B)
	M=(h+w)*80

	
	li=[[[0]*M for i in range(w)] for j in range(h)]

	
	li[0][0][G[0][0]]=1
	for i in range(h):
		for j in range(w):
			for k in range(M):

				if li[i][j][k]==1:

					try:
						li[i + 1][j][abs(k - G[i][j])] = 1
						li[i + 1][j][abs(k + G[i][j])] = 1
					except:
						pass
					try:
						li[i][j + 1][abs(k - G[i][j])] = 1
						li[i][j + 1][abs(k + G[i][j])] = 1
					except:
						pass
	
	for i in range(M):
		if li[h-1][w-1][i]==1:
			print(i-1)
			exit(0)
	
if __name__ == "__main__":
	main()


Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
import numpy as np

def main():
	h,w=map(int,input().split())
	AB=np.array(read().split(), np.int64)
	
	
	A=AB[:h*w]
	B=AB[h*w:]
	
	A=np.reshape(A, (h,w))
	B = np.reshape(B, (h, w))
	
	G=abs(A-B)
	M=(h+w)*80

	
	li=[[[10**9]*M for i in range(w)] for j in range(h)]

	
	li[0][0][G[0][0]]=G[0][0]
	for i in range(h):
		for j in range(w):
			for k in range(M):

				if li[i][j][k]!=10**9:

					try:
						li[i + 1][j][abs(k - G[i][j])] = abs(k - G[i][j])
						li[i + 1][j][abs(k + G[i][j])] = abs(k + G[i][j])
					except:
						pass
					try:
						li[i][j + 1][abs(k - G[i][j])] = abs(k - G[i][j])
						li[i][j + 1][abs(k + G[i][j])] = abs(k + G[i][j])
					except:
						pass
	
	
	print(min(li[h-1][w-1])-1)
	
			
			
			
if __name__ == "__main__":
	main()


Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
import numpy as np

def main():
	h,w=map(int,input().split())
	AB=np.array(read().split(), np.int64)
	
	
	A=AB[:h*w]
	B=AB[h*w:]
	
	A=np.reshape(A, (h,w))
	B = np.reshape(B, (h, w))
	
	G=abs(A-B)
	M=h*w*80
	
	li=[[[]for i in range(w)] for j in range(h)]
	for i in range(h):
		for j in range(w):
			if i==j==0:
				li[i][j].append(G[i][j])
			elif i==0:
				for k in li[i][j-1]:
					aa=abs(k-G[i][j])
					bb=abs(k+G[i][j])
					if aa<=M:
						li[i][j].append(aa)
					if abs(bb)<=M:
						li[i][j].append(bb)
			elif j==0:
				for k in li[i-1][j]:
					aa=abs(k-G[i][j])
					bb=abs(k+G[i][j])
					if aa<=M:
						li[i][j].append(aa)
					if abs(bb)<=M:
						li[i][j].append(bb)
			else:
				for k in li[i-1][j]:
					aa=abs(k-G[i][j])
					bb=abs(k+G[i][j])
					if aa<=M:
						li[i][j].append(aa)
					if abs(bb)<=M:
						li[i][j].append(bb)
				for k in li[i][j-1]:
					aa=abs(k-G[i][j])
					bb=abs(k+G[i][j])
					if aa<=M:
						li[i][j].append(aa)
					if abs(bb)<=M:
						li[i][j].append(bb)
			
			s=set(li[i][j])
			li[i][j]=list(s)
			
			
			
			
	print(min(li[h-1][w-1]))
	
if __name__ == "__main__":
	main()


Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
import numpy as np
import bisect

def main():
	h,w=map(int,input().split())
	AB=np.array(read().split(), np.int64)
	
	
	A=AB[:h*w]
	B=AB[h*w:]
	
	A=np.reshape(A, (h,w))
	B = np.reshape(B, (h, w))
	
	G=abs(A-B)
	M=h*w*80
	
	li=[[[]for i in range(w)] for j in range(h)]
	for i in range(h):
		for j in range(w):
			if i==j==0:
				li[i][j].append(G[i][j])
			elif i==0:
				for k in li[i][j-1]:
					if abs(k-G[i][j])<=M:
						li[i][j].append(abs(k-G[i][j]))
					if abs(k+G[i][j])<=M:
						li[i][j].append(abs(k + G[i][j]))
			elif j==0:
				for k in li[i-1][j]:
					if abs(k-G[i][j])<=M:
						li[i][j].append(abs(k-G[i][j]))
					if abs(k+G[i][j])<=M:
						li[i][j].append(abs(k + G[i][j]))
			else:
				for k in li[i-1][j]:
					if abs(k-G[i][j])<=M:
						li[i][j].append(abs(k-G[i][j]))
					if abs(k+G[i][j])<=M:
						li[i][j].append(abs(k + G[i][j]))
				for k in li[i][j-1]:
					if abs(k-G[i][j])<=M:
						li[i][j].append(abs(k-G[i][j]))
					if abs(k+G[i][j])<=M:
						li[i][j].append(abs(k + G[i][j]))
			
	print(min(li[h-1][w-1]))
	
if __name__ == "__main__":
	main()


Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
import numpy as np
import bisect

def main():
	h,w=map(int,input().split())
	AB=np.array(read().split(), np.int64)
	
	
	A=AB[:h*w]
	B=AB[h*w:]
	
	A=np.reshape(A, (h,w))
	B = np.reshape(B, (h, w))
	
	G=abs(A-B)
	
	li=[[[]for i in range(w)] for j in range(h)]
	for i in range(h):
		for j in range(w):
			if i==j==0:
				li[i][j].append(G[i][j])
			elif i==0:
				for k in li[i][j-1]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
			elif j==0:
				for k in li[i-1][j]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
			else:
				for k in li[i-1][j]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
				for k in li[i][j-1]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
			s=set(li[i][j])
			li[i][j]=sorted(list(s))
			idx=bisect.bisect_left(li[i][j],h*w*80)
			li[i][j]=li[i][j][:idx]
			
	print(min(li[h-1][w-1]))
	
if __name__ == "__main__":
	main()


Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines

mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
import numpy as np

def main():
	h,w=map(int,input().split())
	AB=np.array(read().split(), np.int64)
	
	
	A=AB[:h*w]
	B=AB[h*w:]
	
	A=np.reshape(A, (h,w))
	B = np.reshape(B, (h, w))
	
	G=abs(A-B)
	
	li=[[[]for i in range(w)] for j in range(h)]
	for i in range(h):
		for j in range(w):
			if i==j==0:
				li[i][j].append(G[i][j])
			elif i==0:
				for k in li[i][j-1]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
			elif j==0:
				for k in li[i-1][j]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
			else:
				for k in li[i-1][j]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
				for k in li[i][j-1]:
					li[i][j].append(abs(k-G[i][j]))
					li[i][j].append(abs(k + G[i][j]))
			s=set(li[i][j])
			li[i][j]=sorted(list(s))
			
	print(min(li[h-1][w-1]))
	
if __name__ == "__main__":
	main()


Fixed submission:
import sys

read = sys.stdin.buffer.read
input = sys.stdin.buffer.readline
inputs = sys.stdin.buffer.readlines


# mod=10**9+7
# rstrip().decode('utf-8')
# map(int,input().split())
# import numpy as np

def main():
	h, w = map(int, input().split())
	
	G = [[0] * w for i in range(h)]
	A = [0]*h
	B = [0]*h
	
	for i in range(h):
		A[i] = list(map(int, input().split()))
	for i in range(h):
		B[i] = list(map(int, input().split()))
	
	for i in range(h):
		for j in range(w):
			G[i][j]=abs(A[i][j]-B[i][j])

	M = (h + w) * 80

	li = [[[0] * M for i in range(w)] for j in range(h)]
	
	li[0][0][G[0][0]] = 1
	for i in range(h):
		for j in range(w):
			for k in range(M):
				
				if li[i][j][k] == 1:
					if i < h - 1:
						li[i + 1][j][abs(k - G[i+1][j])] = 1
						li[i + 1][j][abs(k + G[i+1][j])] = 1
					if j < w - 1:
						li[i][j + 1][abs(k - G[i][j+1])] = 1
						li[i][j + 1][abs(k + G[i][j+1])] = 1

	for i in range(M):
		if li[h-1][w - 1][i] == 1:
			print(i)
			exit(0)


if __name__ == "__main__":
	main()