Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    ans = True
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(reversed(S)):
        #print(L0, A[N - i - 1])
        if s == "0":
            tmp = set(np.array(L0) ^ A[N - i - 1])
            L0 = list(set(L0).union(tmp))
        if s == "1":
            if A[N - i - 1] not in L0:
                ans = False
                break

    print(int(not ans))


Fixed submission:
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    ans = 0
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(reversed(S)):
        tmp = A[N - 1 - i]
        for l0 in L0:
            if tmp ^ l0 < tmp:
                tmp = tmp ^ l0
        if tmp > 0:
            if s == "1":
                ans = 1
                break
            L0.append(tmp)
    print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    L1 = [0]
    #print("x:", x)
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(S):
        if s == "0":
            tmp = set(np.array(L0) ^ A[i])
            L0 = list(set(L0).union(tmp))
        if s == "1":
            tmp = set(np.array(L1) ^ A[i])
            L1 = list(set(L1).union(tmp))

    #print(L0, L1, set(L0) <= set(L1))
    if set(L0) <= set(L1):
        print(0)
    else:
        print(1)


Fixed submission:
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    ans = 0
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(reversed(S)):
        tmp = A[N - 1 - i]
        for l0 in L0:
            if tmp ^ l0 < tmp:
                tmp = tmp ^ l0
        if tmp > 0:
            if s == "1":
                ans = 1
                break
            L0.append(tmp)
    print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    L1 = [0]
    #print("x:", x)
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(S):
        if s == "0":
            tmp = np.array(L0) ^ A[i]
            L0.extend(list(tmp))
            L0 = set(L0)
            L0 = list(L0)
        if s == "1":
            tmp = np.array(L1) ^ A[i]
            L1.extend(list(tmp))
            L1 = set(L1)
            L1 = list(L1)

    #print(L0, L1, set(L0) <= set(L1))
    if set(L0) <= set(L1):
        print(0)
    else:
        print(1)


Fixed submission:
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    ans = 0
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(reversed(S)):
        tmp = A[N - 1 - i]
        for l0 in L0:
            if tmp ^ l0 < tmp:
                tmp = tmp ^ l0
        if tmp > 0:
            if s == "1":
                ans = 1
                break
            L0.append(tmp)
    print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    L1 = [0]
    #print("x:", x)
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(S):
        if s == "0":
            for l0 in L0:
                if l0 ^ A[i] not in L0:
                    L0.append(l0 ^ A[i])
        if s == "1":
            for l1 in L1:
                if l1 ^ A[i] not in L1:
                    L1.append(l1 ^ A[i])
    if set(L0) <= set(L1):
        print(0)
    else:
        print(1)


Fixed submission:
import numpy as np
import math
import collections

T = int(input())
for i in range(T):
    x = 0
    L0 = [0]
    ans = 0
    N = int(input())
    A = list(map(int, input().split()))
    S = input()
    for i, s in enumerate(reversed(S)):
        tmp = A[N - 1 - i]
        for l0 in L0:
            if tmp ^ l0 < tmp:
                tmp = tmp ^ l0
        if tmp > 0:
            if s == "1":
                ans = 1
                break
            L0.append(tmp)
    print(ans)