Buggy python submission (verdict: Time Limit Exceeded):
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

def f(a, s, n):
    if s[-1] == "1":
        return 1

    st = {0,}
    for i in range(n-1, -1, -1):
        ai, si = a[i], s[i]

        if si == "0":
            tmp = [ai ^x for x in st]
            st.update(tmp)
        else:
            if ai in  st:
                st.remove(ai)
            else:
                return 1
    return 0


def resolve():
    T = int(input())

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        ans.append(f(A, S, N))

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()


Fixed submission:
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

X = (10**18).bit_length()

def f(a, s, n):
    if s[-1] == "1":
        return 1

    B = [None] * X
    for i in range(n-1, -1, -1):
        ai, si = a[i], s[i]

        if si == "0":
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    B[x] = ai
                    break
                ai ^= B[x]
        else:
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    return 1
                ai ^= B[x]
    return 0


def resolve():
    T = int(input())

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        ans.append(f(A, S, N))

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()

Buggy python submission (verdict: Time Limit Exceeded):
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

def f(a, s, n):
    if s[-1] == "1":
        return 1

    s0 = "0"
    st = {0,}
    aa = [st]
    for ai, si in zip(a, s):
        if s0 == si:
            tmp = [x^ai for x in st]
            st.update(tmp)
        else:
            st = {0, ai,}
            aa.append(st)
            s0 = si

    a3 = set()
    for i in range(len(aa)-1, 0, -2):
        a0, a1 = aa[i], aa[i-1]
        a0 |= a3
        if a1 <= a0:
            a3 = a0 - a1
        else:
            return 1
    return 0


def resolve():
    T = int(input())

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        ans.append(f(A, S, N))

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()


Fixed submission:
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

X = (10**18).bit_length()

def f(a, s, n):
    if s[-1] == "1":
        return 1

    B = [None] * X
    for i in range(n-1, -1, -1):
        ai, si = a[i], s[i]

        if si == "0":
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    B[x] = ai
                    break
                ai ^= B[x]
        else:
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    return 1
                ai ^= B[x]
    return 0


def resolve():
    T = int(input())

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        ans.append(f(A, S, N))

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()

Buggy python submission (verdict: Time Limit Exceeded):
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

from functools import lru_cache

def resolve():
    T = int(input())

    @lru_cache
    def f(x, i):
        if i == N:
            return "1" if x else "0"

        ans = f(x, i+1)
        if S[i] == ans:
            return ans
        return f(x^A[i], i+1)

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        if S[-1] == "1":
            ans.append("1")
        else:
            ans.append(f(0, 0))

        f.cache_clear()

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()


Fixed submission:
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

X = (10**18).bit_length()

def f(a, s, n):
    if s[-1] == "1":
        return 1

    B = [None] * X
    for i in range(n-1, -1, -1):
        ai, si = a[i], s[i]

        if si == "0":
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    B[x] = ai
                    break
                ai ^= B[x]
        else:
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    return 1
                ai ^= B[x]
    return 0


def resolve():
    T = int(input())

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        ans.append(f(A, S, N))

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()

Buggy python submission (verdict: Runtime Error):
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

from functools import lru_cache

def resolve():
    T = int(input())

    @lru_cache
    def f(x, i):
        if i == N:
            return "1" if x else "0"

        ans = f(x, i+1)
        if S[i] == ans:
            return ans
        return f(x^A[i], i+1)

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        if S[-1] == "1":
            ans.append("1")
        else:
            ans.append(f(0, 0))

        f.cache_clear()

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()


Fixed submission:
#!python3

import sys
iim = lambda: map(int, sys.stdin.readline().rstrip().split())

X = (10**18).bit_length()

def f(a, s, n):
    if s[-1] == "1":
        return 1

    B = [None] * X
    for i in range(n-1, -1, -1):
        ai, si = a[i], s[i]

        if si == "0":
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    B[x] = ai
                    break
                ai ^= B[x]
        else:
            while True:
                x = ai.bit_length() - 1
                if B[x] == ai: break
                elif B[x] == None:
                    return 1
                ai ^= B[x]
    return 0


def resolve():
    T = int(input())

    ans = []
    for i in range(T):
        N = int(input())
        A = list(iim())
        S  = input()

        ans.append(f(A, S, N))

    print(*ans, sep="\n")

if __name__ == "__main__":
    resolve()