Buggy python submission (verdict: Runtime Error):
n = int(input())
A = list(map(int, input().split()))
b = []
for i in reversed(range(n)):
    if A[i]:
        num = i + 1
        b.append(num)
        tmp = 1
        while tmp * tmp <= num:
            if num % tmp == 0:
                A[num] ^= 1
                if tmp != num // tmp:
                    A[num//tmp]
            tmp += 1
print(len(b))
print(*b)


Fixed submission:
def div(n):
    lower_div, upper_div = [], []
    i = 1
    while i * i <= n:
        if n % i == 0:
            lower_div.append(i)
            if i != n // i:
                upper_div.append(n // i)
        i += 1
    return lower_div + upper_div[::-1]

def main():
    n = int(input())
    A = list(map(int, input().split()))
    L = [0] * n
    b = []
    for i in reversed(range(n)):
        if A[i] != L[i] % 2:
            b.append(i+1)
            d = div(i + 1)
            for j in d:
                L[j-1] += 1
    print(len(b))
    print(*b)

main()

Buggy python submission (verdict: Time Limit Exceeded):
def div(n):
    lower_div, upper_div = [], []
    i = 1
    while i * i <= n:
        if n % i == 0:
            lower_div.append(i)
            if i != n // i:
                upper_div.append(n // i)
        i += 1
    return lower_div + upper_div[::-1]

def main():
    n = int(input())
    A = list(map(int, input().split()))
    L = [0] * n
    b = []
    cnt = 0
    for i in reversed(range(n)):
        if A[i] != L[i] % 2:
            b.append(i+1)
            cnt += 1
            d = div(i + 1)
            for j in d:
                L[j-1] += 1
    print(cnt)
    print(*b)

main()


Fixed submission:
def div(n):
    lower_div, upper_div = [], []
    i = 1
    while i * i <= n:
        if n % i == 0:
            lower_div.append(i)
            if i != n // i:
                upper_div.append(n // i)
        i += 1
    return lower_div + upper_div[::-1]

def main():
    n = int(input())
    A = list(map(int, input().split()))
    L = [0] * n
    b = []
    for i in reversed(range(n)):
        if A[i] != L[i] % 2:
            b.append(i+1)
            d = div(i + 1)
            for j in d:
                L[j-1] += 1
    print(len(b))
    print(*b)

main()

Buggy python submission (verdict: Time Limit Exceeded):
def div(n):
    lower_div, upper_div = [], []
    i = 1
    while i * i <= n:
        if n % i == 0:
            lower_div.append(i)
            if i != n // i:
                upper_div.append(n // i)
        i += 1
    return lower_div + upper_div[::-1]

n = int(input())
A = list(map(int, input().split()))
L = [0] * n
ans = [0] * n
for i in reversed(range(n)):
    if A[i] != L[i] % 2:
        ans[i] = 1
        d = div(i + 1)
        for j in d:
            L[j-1] += 1
print(n - ans.count(0))
for i in range(n):
    if ans[i]:
        print(i+1, end=' ')


Fixed submission:
def div(n):
    lower_div, upper_div = [], []
    i = 1
    while i * i <= n:
        if n % i == 0:
            lower_div.append(i)
            if i != n // i:
                upper_div.append(n // i)
        i += 1
    return lower_div + upper_div[::-1]

def main():
    n = int(input())
    A = list(map(int, input().split()))
    L = [0] * n
    b = []
    for i in reversed(range(n)):
        if A[i] != L[i] % 2:
            b.append(i+1)
            d = div(i + 1)
            for j in d:
                L[j-1] += 1
    print(len(b))
    print(*b)

main()