Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
import sys
def input():
	return sys.stdin.readline()[:-1]

def rank(a):
	n, m = len(a), len(a[0])
	#a = np.array([list(map(int, input().split())) for _ in [0]*n])
	if n > m:
		a = a.T
		n, m = m, n
	r = 0
	for i in range(n):
		if a[i][i] != 1:
			for j in range(i+1, m):
				if a[i][j] == 1:
					a[:, [i, j]] = a[:, [j, i]]
					break
			else:
				for j in range(i+1, n):
					if a[j][i] == 1:
						a[[i, j]] = a[[j, i]]
					break
				else:
					break
		if a[i][i] == 0:
			continue

		r += 1
		for j in range(i+1, m):
			a[:, j] ^= a[i][j] * a[:, i]
		for j in range(i+1, n):
			a[j] ^= a[j][i] * a[i]
	
	return r
	#print((pow(2, n+m-1, MOD) - pow(2, n+m-r-1, MOD)) % MOD)

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	if s[-1] == "1":
		print(1)
		continue
	else:
		i = 0
		z, zo = [], []
		for i in range(n):
			if s[i] == "1":
				zo.append([(a[i] >> k) & 1 for k in range(60)])
				
			else:
				zo.append([(a[i] >> k) & 1 for k in range(60)])
				z.append([(a[i] >> k) & 1 for k in range(60)])
				
		#print(z, zo)
		if rank(np.array(z)) != rank(np.array(zo)):
			print(1)
		else:
			print(0)

Fixed submission:
import sys
def input():
	return sys.stdin.readline()[:-1]

def least_bit_set(x):
	return x & (-x)


def delete_zeros_from(values, start):
	i = start
	for j in range(start, len(values)):
		if values[j] != 0:
			values[i] = values[j]
			i += 1
	del values[i:]


def eliminate(values):
	values = list(values)
	i = 0
	while True:
		delete_zeros_from(values, i)
		if i >= len(values):
			return values
		j = i
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) < least_bit_set(values[j]):
				j = k
		values[i], values[j] = (values[j], values[i])
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) == least_bit_set(values[i]):
				values[k] ^= values[i]
		i += 1


def in_span(x, eliminated_values):
	for y in eliminated_values:
		if least_bit_set(y) & x != 0:
			x ^= y
	return x == 0



#values = [1, 5, 8, 2, 10]
#eliminated_values = eliminate(values)
#print(eliminated_values)
#x = int(input())
#print(in_span(x, eliminated_values))

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	values = []
	ok = True
	for i in range(n-1, -1, -1):
		if s[i] == "0":
			values.append(a[i])
		else:
			elim = eliminate(values)
			if not in_span(a[i], elim):
				ok = False
				break
	if ok:
		print(0)
	else:
		print(1)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
import sys
def input():
	return sys.stdin.readline()[:-1]

def rank(a):
	n, m = len(a), len(a[0])
	#a = np.array([list(map(int, input().split())) for _ in [0]*n])
	if n > m:
		a = a.T
		n, m = m, n
	r = 0
	for i in range(n):
		if a[i][i] != 1:
			for j in range(i+1, m):
				if a[i][j] == 1:
					a[:, [i, j]] = a[:, [j, i]]
					break
			else:
				for j in range(i+1, n):
					if a[j][i] == 1:
						a[[i, j]] = a[[j, i]]
					break
				else:
					break
		if a[i][i] == 0:
			continue

		r += 1
		for j in range(i+1, m):
			a[:, j] += a[i][j] * a[:, i]
			a[:, j] %= 2
		for j in range(i+1, n):
			a[j] += a[j][i] * a[i]
			a[j] %= 2
	
	return r
	#print((pow(2, n+m-1, MOD) - pow(2, n+m-r-1, MOD)) % MOD)

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	if s[-1] == "1":
		print(1)
		continue
	else:
		i = 0
		z, zo = [], []
		for i in range(n):
			if s[i] == "1":
				zo.append([(a[i] >> k) & 1 for k in range(60)])
				
			else:
				zo.append([(a[i] >> k) & 1 for k in range(60)])
				z.append([(a[i] >> k) & 1 for k in range(60)])
				
		#print(z, zo)
		if rank(np.array(z)) != rank(np.array(zo)):
			print(1)
		else:
			print(0)

Fixed submission:
import sys
def input():
	return sys.stdin.readline()[:-1]

def least_bit_set(x):
	return x & (-x)


def delete_zeros_from(values, start):
	i = start
	for j in range(start, len(values)):
		if values[j] != 0:
			values[i] = values[j]
			i += 1
	del values[i:]


def eliminate(values):
	values = list(values)
	i = 0
	while True:
		delete_zeros_from(values, i)
		if i >= len(values):
			return values
		j = i
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) < least_bit_set(values[j]):
				j = k
		values[i], values[j] = (values[j], values[i])
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) == least_bit_set(values[i]):
				values[k] ^= values[i]
		i += 1


def in_span(x, eliminated_values):
	for y in eliminated_values:
		if least_bit_set(y) & x != 0:
			x ^= y
	return x == 0



#values = [1, 5, 8, 2, 10]
#eliminated_values = eliminate(values)
#print(eliminated_values)
#x = int(input())
#print(in_span(x, eliminated_values))

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	values = []
	ok = True
	for i in range(n-1, -1, -1):
		if s[i] == "0":
			values.append(a[i])
		else:
			elim = eliminate(values)
			if not in_span(a[i], elim):
				ok = False
				break
	if ok:
		print(0)
	else:
		print(1)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
def input():
	return sys.stdin.readline()[:-1]

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	if s[-1] == "1":
		print(1)
		continue
	else:
		i = 0
		while i < n and s[i] == "0":
			i += 1
		if i == n:
			print(0)
			continue
		ok = True
		o, z = {0}, {0}
		while i < n:
			while s[i] == "1":
				o_new = set()
				for x in o:
					o_new.add(x)
					o_new.add(x^a[i])
				o = o_new
				i += 1
			while i < n and s[i] == "0":
				z_new = set()
				for x in z:
					z_new.add(x)
					z_new.add(x^a[i])
				z = z_new
				i += 1
			if not o.issubset(z):
				ok = False
				break
		if ok:
			print(0)
		else:
			print(1)

Fixed submission:
import sys
def input():
	return sys.stdin.readline()[:-1]

def least_bit_set(x):
	return x & (-x)


def delete_zeros_from(values, start):
	i = start
	for j in range(start, len(values)):
		if values[j] != 0:
			values[i] = values[j]
			i += 1
	del values[i:]


def eliminate(values):
	values = list(values)
	i = 0
	while True:
		delete_zeros_from(values, i)
		if i >= len(values):
			return values
		j = i
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) < least_bit_set(values[j]):
				j = k
		values[i], values[j] = (values[j], values[i])
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) == least_bit_set(values[i]):
				values[k] ^= values[i]
		i += 1


def in_span(x, eliminated_values):
	for y in eliminated_values:
		if least_bit_set(y) & x != 0:
			x ^= y
	return x == 0



#values = [1, 5, 8, 2, 10]
#eliminated_values = eliminate(values)
#print(eliminated_values)
#x = int(input())
#print(in_span(x, eliminated_values))

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	values = []
	ok = True
	for i in range(n-1, -1, -1):
		if s[i] == "0":
			values.append(a[i])
		else:
			elim = eliminate(values)
			if not in_span(a[i], elim):
				ok = False
				break
	if ok:
		print(0)
	else:
		print(1)

Buggy python submission (verdict: Time Limit Exceeded):
import sys
def input():
	return sys.stdin.readline()[:-1]

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	if s[-1] == "1":
		print(1)
		continue
	else:
		i = 0
		while i < n and s[i] == "0":
			i += 1
		if i == n:
			print(0)
			continue
		ok = True
		o, z = {0}, {0}
		while i < n:
			while s[i] == "1":
				o_new = set()
				for x in o:
					o_new.add(x)
					o_new.add(x^a[i])
				o = o_new
				i += 1
			while i < n and s[i] == "0":
				z_new = set()
				for x in z:
					z_new.add(x)
					z_new.add(x^a[i])
				z = z_new
				i += 1
			if not o.issubset(z):
				ok = False
				break
		if ok:
			print(0)
		else:
			print(1)

Fixed submission:
import sys
def input():
	return sys.stdin.readline()[:-1]

def least_bit_set(x):
	return x & (-x)


def delete_zeros_from(values, start):
	i = start
	for j in range(start, len(values)):
		if values[j] != 0:
			values[i] = values[j]
			i += 1
	del values[i:]


def eliminate(values):
	values = list(values)
	i = 0
	while True:
		delete_zeros_from(values, i)
		if i >= len(values):
			return values
		j = i
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) < least_bit_set(values[j]):
				j = k
		values[i], values[j] = (values[j], values[i])
		for k in range(i + 1, len(values)):
			if least_bit_set(values[k]) == least_bit_set(values[i]):
				values[k] ^= values[i]
		i += 1


def in_span(x, eliminated_values):
	for y in eliminated_values:
		if least_bit_set(y) & x != 0:
			x ^= y
	return x == 0



#values = [1, 5, 8, 2, 10]
#eliminated_values = eliminate(values)
#print(eliminated_values)
#x = int(input())
#print(in_span(x, eliminated_values))

t = int(input())
for _ in range(t):
	n = int(input())
	a = list(map(int, input().split()))
	s = input()
	values = []
	ok = True
	for i in range(n-1, -1, -1):
		if s[i] == "0":
			values.append(a[i])
		else:
			elim = eliminate(values)
			if not in_span(a[i], elim):
				ok = False
				break
	if ok:
		print(0)
	else:
		print(1)