Buggy python submission (verdict: Runtime Error):
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		else:
			if(q[1] < p[1]):
				print(0)
				exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P = P * min(p[1], q[1]) % (10 ** 9 + 7))
print(P) 


Fixed submission:
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		else:
			if(q[1] < p[1]):
				print(0)
				exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P = P * min(p[1], q[1]) % (10 ** 9 + 7)
print(P)

Buggy python submission (verdict: Time Limit Exceeded):
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		elif(q[1] < p[1]):
			print(0)
			exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P *= min(p[1], q[1])
print(P % (10 ** 9 + 7))


Fixed submission:
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		else:
			if(q[1] < p[1]):
				print(0)
				exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P = P * min(p[1], q[1]) % (10 ** 9 + 7)
print(P)

Buggy python submission (verdict: Runtime Error):
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		elif(q[1] < p[1]):
			print(0)
			exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P *= min(p[1], q[1])
print(P % (10 ** 9 + 7)


Fixed submission:
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		else:
			if(q[1] < p[1]):
				print(0)
				exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P = P * min(p[1], q[1]) % (10 ** 9 + 7)
print(P)

Buggy python submission (verdict: Runtime Error):
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
tempT, tempA = 0, 0
for i in range(N):
	if(T[i] > tempT):
		tempT = L[i] = T[i]
		L.append(tempT)
		unknowL.append(0)
	else:
		unknowL.append(T[i])
		L.append(0)
for i in range(N):
	val = A.pop()
	if(A[i] > tempA):
		if(L[i] != 0 and L[i] != val):
			print(0)
			exit()
		tempA = L[i] = val 
		unknowL[i] = 0
	else:
		unknowL[i] = min(unknowL[i], val)
P = 1 
for i in unknowL:
	if(i != 0):
		P *= i	
print(P % (10**9 +7))


Fixed submission:
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		else:
			if(q[1] < p[1]):
				print(0)
				exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P = P * min(p[1], q[1]) % (10 ** 9 + 7)
print(P)

Buggy python submission (verdict: Runtime Error):
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
tempT, tempA = 0, 0
for i in range(N):
	if(T[i] > tempT):
		tempT = L[i] = T[i]
		L.append(tempT)
		unknowL.append(0)
	else:
		unknowL.append(T[i])
		L.append(0)
for i in range(N-1, -1, -1):
	if(A[i] > tempA):
		if(L[i] != 0 and L[i] != A[i]):
			print(0)
			exit()
		tempA = L[i] = A[i]
		unknowL[i] = 0
	else:
		unknowL[i] = min(unknowL[i], A[i])
P = 1 
for i in unknowL:
	if(i != 0):
		P *= i	
print(P % (10**9 +7))

Fixed submission:
def read():
	return [int(i) for i in input().split(" ")]
N = int(input())
T = read()
A = read()
t = [(i != j, i) for i, j in zip(T, [None] + T)]
a = [(i != j, i) for i, j in zip(A, (A + [None])[1:])]
P = 1
for p, q in zip(t, a):
	if(p[0]):
		if(q[0]):
			if(p[1] != q[1]):
				print(0)
				exit()
		else:
			if(q[1] < p[1]):
				print(0)
				exit()
	elif(q[0]):
		if(p[1] < q[1]):
			print(0)
			exit()
	else:
		P = P * min(p[1], q[1]) % (10 ** 9 + 7)
print(P)