Buggy python submission (verdict: Time Limit Exceeded):
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        if s == '1':
            if a not in dp:
                dp = set()
                break
        else:
            for b in dp.copy():
                dp.add(b ^ a)
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')


Fixed submission:
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        for b in dp:
            a = min(a, a ^ b)
        if s == '1':
            if a:
                dp = set()
                break
        else:
            dp2 = set([a])
            for b in dp:
                dp2.add(min(b, a ^ b))
            dp = dp2
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')

Buggy python submission (verdict: Time Limit Exceeded):
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        if s == '1':
            dp = dp if a in dp else set()
        else:
            for b in dp.copy():
                dp.add(b ^ a)
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')


Fixed submission:
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        for b in dp:
            a = min(a, a ^ b)
        if s == '1':
            if a:
                dp = set()
                break
        else:
            dp2 = set([a])
            for b in dp:
                dp2.add(min(b, a ^ b))
            dp = dp2
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')

Buggy python submission (verdict: Time Limit Exceeded):
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        if s == '1':
            dp2 = set()
            for b in dp:
                if b ^ a in dp:
                    dp2.add(b)
            dp = dp2
        else:
            for b in dp.copy():
                dp.add(b ^ a)
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')


Fixed submission:
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        for b in dp:
            a = min(a, a ^ b)
        if s == '1':
            if a:
                dp = set()
                break
        else:
            dp2 = set([a])
            for b in dp:
                dp2.add(min(b, a ^ b))
            dp = dp2
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')

Buggy python submission (verdict: Time Limit Exceeded):
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        if s == '1':
            dp2 = set()
            for b in dp:
                if b ^ a in dp:
                    dp2.add(b)
            dp = dp2
        else:
            for b in dp.copy():
                dp.add(b ^ a)
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')


Fixed submission:
T = int(input())
ans = []
for _ in range(T):
    N = int(input())
    A = [int(_) for _ in input().split()]
    S = input()
    dp = set([0])
    for a, s in zip(A[::-1], S[::-1]):
        for b in dp:
            a = min(a, a ^ b)
        if s == '1':
            if a:
                dp = set()
                break
        else:
            dp2 = set([a])
            for b in dp:
                dp2.add(min(b, a ^ b))
            dp = dp2
    ans += [0 if 0 in dp else 1]
print(*ans, sep='\n')