Buggy python submission (verdict: Time Limit Exceeded):
T = int(input())

for i in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    S = input().rstrip()

    if S[-1] == '1':
        print('1')

    win = set()
    win.add(0)
    for j in range(len(S)-1, -1, -1):
        tmp = set()
        if S[j] == '0':
            for v in win:
                tmp.add(v ^ A[j])
            win |= tmp
        else:
            for v in win:
                if v ^ A[j] not in win:
                    tmp.add(v)
            win -= tmp

    if 0 in win:
        print('0')
    else:
        print('1')


Fixed submission:
T = int(input())

for i in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    S = input().rstrip()

    win = set()
    win.add(0)
    for j in range(len(S)-1, -1, -1):
        base = A[j]
        for v in win:
            base = min(base, base ^ v)

        if S[j] == '0':
            win.add(base)
        else:
            if base:
                print('1')
                break
    else:
        print('0')

Buggy python submission (verdict: Runtime Error):
T = int(input())

for i in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    S = input().rstrip()

    if S[-1] == '1':
        print('1')

    win = set()
    win.add(0)
    for j in range(len(S)-1, -1, -1):
        tmp = set()
        if S[j] == '0':
            for v in win:
                tmp.add(v ^ A[j])
            win += tmp
        else:
            for v in win:
                if v ^ A[j] not in win:
                    tmp.add(v)
            win -= tmp

    if 0 in win:
        print('0')
    else:
        print('1')


Fixed submission:
T = int(input())

for i in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    S = input().rstrip()

    win = set()
    win.add(0)
    for j in range(len(S)-1, -1, -1):
        base = A[j]
        for v in win:
            base = min(base, base ^ v)

        if S[j] == '0':
            win.add(base)
        else:
            if base:
                print('1')
                break
    else:
        print('0')

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

T = int(input())

for i in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    S = input().rstrip()

    if S[-1] == '1':
        print('1')

    win = set()
    win.add(0)
    for j in range(len(S)-1, -1, -1):
        tmp = copy.copy(win)
        if S[j] == '0':
            for v in win:
                tmp.add(v ^ A[j])
        else:
            for v in win:
                if v ^ A[j] not in win:
                    tmp.remove(v)

        win = tmp

    if 0 in win:
        print('0')
    else:
        print('1')


Fixed submission:
T = int(input())

for i in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    S = input().rstrip()

    win = set()
    win.add(0)
    for j in range(len(S)-1, -1, -1):
        base = A[j]
        for v in win:
            base = min(base, base ^ v)

        if S[j] == '0':
            win.add(base)
        else:
            if base:
                print('1')
                break
    else:
        print('0')