Buggy python submission (verdict: Time Limit Exceeded):
# coding: utf-8
import sys

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))

# 逆から、人1が多かったらその時点で駄目、人0が人1の数を覆い尽くす必要がある
T = ir()

def solve():
    N = ir()
    A = lr()
    S = sr()
    dp = [None] * (N+1)
    dp[N] = {0}
    for i in range(N-1, -1, -1):
        if S[i] == '0':
            dp[i] = dp[i+1].copy()
            for element in dp[i+1]:
                dp[i].add(element ^ A[i])
        elif S[i] == '1':
            if A[i] not in dp[i+1]:
                return 1
            else:
                dp[i] = dp[i+1]
    return 0
    
for _ in range(T):
    print(solve())


Fixed submission:
# coding: utf-8
import sys

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))

# 逆から, zero_cardsに数を貯めて行き、bitで0に出来るか
T = ir()
for _ in range(T):
    N = ir()
    A = lr()
    S = sr()
    zero_cards = []
    for a, person in zip(A[::-1], S[::-1]):
        for z in zero_cards:
            a = min(a, a^z)
        if a:
            if person == '1':
                print(1)
                break
            zero_cards.append(a)
    else:
        print(0)

Buggy python submission (verdict: Time Limit Exceeded):
# coding: utf-8
import sys

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))

# 逆から、人1が多かったらその時点で駄目、人0が人1の数を覆い尽くす必要がある
T = ir()

def solve():
    N = ir()
    A = lr()
    S = sr()
    dp = [set()] * (N+1)
    dp[N] = {0}
    for i in range(N-1, -1, -1):
        if S[i] == '0':
            dp[i] = dp[i+1].copy()
            for element in dp[i+1]:
                dp[i].add(element ^ A[i])
        elif S[i] == '1':
            if A[i] not in dp[i+1]:
                return 1
            else:
                dp[i] = dp[i+1].copy()
    return 0
    
for _ in range(T):
    print(solve())

Fixed submission:
# coding: utf-8
import sys

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))

# 逆から, zero_cardsに数を貯めて行き、bitで0に出来るか
T = ir()
for _ in range(T):
    N = ir()
    A = lr()
    S = sr()
    zero_cards = []
    for a, person in zip(A[::-1], S[::-1]):
        for z in zero_cards:
            a = min(a, a^z)
        if a:
            if person == '1':
                print(1)
                break
            zero_cards.append(a)
    else:
        print(0)

Buggy python submission (verdict: Time Limit Exceeded):
# coding: utf-8
import sys

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))

# 逆から、人1が多かったらその時点で駄目、人0が人1の数を覆い尽くす必要がある
T = ir()

def solve():
    N = ir()
    A = lr()
    S = sr()
    dp = [set()] * (N+1)
    dp[N] = {0}
    for i in range(N-1, -1, -1):
        if S[i] == '0':
            dp[i] = dp[i+1].copy()
            for element in dp[i+1]:
                dp[i].add(element ^ A[i])
        else:
            cand = dp[i+1].copy()
            cand2 = set()
            for element in dp[i+1]:
                cand2.add(element ^ A[i])
            dp[i] = cand.intersection(cand2)
            if 0 not in dp[i]:
                print(1); return
    print(0); return
    
for _ in range(T):
    solve()

Fixed submission:
# coding: utf-8
import sys

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))

# 逆から, zero_cardsに数を貯めて行き、bitで0に出来るか
T = ir()
for _ in range(T):
    N = ir()
    A = lr()
    S = sr()
    zero_cards = []
    for a, person in zip(A[::-1], S[::-1]):
        for z in zero_cards:
            a = min(a, a^z)
        if a:
            if person == '1':
                print(1)
                break
            zero_cards.append(a)
    else:
        print(0)