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

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    if A[-1] == 1:
        C[-1] == 1

    for j in range(N, 0, -1):
        cnt = np.count_nonzero(C[j::j] == 1)
        a = cnt % 2
        C[j] = a ^ A[j]

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        for i, c in enumerate(C):
            if c == 1:
                print(i)


main()


Fixed submission:
import sys

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    if A[-1] == 1:
        C[-1] == 1

    for j in range(N, 0, -1):
        cnt = np.count_nonzero(C[j::j])
        C[j] = (cnt % 2) ^ A[j]

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        B = np.arange(N + 1)
        li = B[C == 1]
        print(*li, sep='\n')


main()

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

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    if A[-1] == 1:
        C[-1] == 1

    for j in range(N, 0, -1):
        cnt = np.count_nonzero(C[j::j] == 1)

        if cnt % 2 == 0:
            if A[j] == 0:
                C[j] = 0
            else:
                C[j] = 1
        else:
            if A[j] == 0:
                C[j] = 1
            else:
                C[j] = 0

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        for i, c in enumerate(C):
            if c == 1:
                print(i)


main()


Fixed submission:
import sys

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    if A[-1] == 1:
        C[-1] == 1

    for j in range(N, 0, -1):
        cnt = np.count_nonzero(C[j::j])
        C[j] = (cnt % 2) ^ A[j]

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        B = np.arange(N + 1)
        li = B[C == 1]
        print(*li, sep='\n')


main()

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

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    if A[-1] == 1:
        C[-1] == 1

    for j in range(N, 0, -1):
        cnt = np.sum(C[j::j])

        if cnt % 2 == 0:
            if A[j] == 0:
                C[j] = 0
            else:
                C[j] = 1
        else:
            if A[j] == 0:
                C[j] = 1
            else:
                C[j] = 0

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        for i, c in enumerate(C):
            if c == 1:
                print(i)


main()


Fixed submission:
import sys

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    if A[-1] == 1:
        C[-1] == 1

    for j in range(N, 0, -1):
        cnt = np.count_nonzero(C[j::j])
        C[j] = (cnt % 2) ^ A[j]

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        B = np.arange(N + 1)
        li = B[C == 1]
        print(*li, sep='\n')


main()

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

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    for i in range(N):
        j = N - i
        cnt = np.sum(C[A % j == 0])

        if cnt % 2 == 0:
            if A[j] == 0:
                C[j] = 0
            else:
                C[j] = 1
        else:
            if A[i] == 0:
                C[j] = 1
            else:
                C[j] = 0

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        for i, c in enumerate(C):
            if c == 1:
                print(i)


main()


Fixed submission:
import sys

import numpy as np

readline = sys.stdin.buffer.readline


def main():
    N = int(readline())
    A = [0] + list(map(int, readline().split()))
    A = np.array(A)
    C = np.zeros(N + 1, dtype=np.int32)

    if A[-1] == 1:
        C[-1] == 1

    for j in range(N, 0, -1):
        cnt = np.count_nonzero(C[j::j])
        C[j] = (cnt % 2) ^ A[j]

    ans = np.sum(C)
    print(ans)
    if ans != 0:
        B = np.arange(N + 1)
        li = B[C == 1]
        print(*li, sep='\n')


main()