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

def div(i):
    ans = []
    for d in range(1, i + 1):
        if i % d == 0:
            if d ** 2 > i: break
            if d ** 2 == i: ans.append(d)
            else:
                ans.append(d)
                ans.append(i // d)
    return ans

def solve():
    input = sys.stdin.readline
    N = int(input())
    A = [int(a) for a in input().split()]
    Count = [0] * N
    In = []
    add = 0
    for i in reversed(range(N)):
        if Count[i] % 2 == A[i]: continue
        elif (Count[i] + 1) % 2 == A[i]:
            add += 1
            In.append(i + 1)
            D = div(i + 1)
            for d in D: Count[d - 1] += 1
        else:
            print(-1)
            break
    else:
        print(add)
        print(" ".join(map(str, In)))

    return 0

if __name__ == "__main__":
    solve()

Fixed submission:
import sys

def divisor(N, B):
    i = 1
    d = []
    while i ** 2 <= N:
        if N % i == 0:
            B[i-1] = (B[i-1] + 1) % 2
            if i ** 2 < N: B[N // i - 1] = (B[N//i - 1] + 1) % 2 
        i += 1
    return 0


def solve():
    input = sys.stdin.readline
    N = int(input())
    A = [int(a) for a in input().split()]
    B = [0] * N
    ans = []
    M = 0

    for i in reversed(range(N)):
        if B[i] != A[i]:
            divisor(i+1, B)
            M += 1
            ans.append(i+1)

    print(M)
    print(" ".join(map(str, ans)))

    return 0

if __name__ == "__main__":
    solve()

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

def div(i):
    ans = []
    for d in range(1, i + 1):
        if i % d == 0:
            if d ** 2 > i: break
            if d ** 2 == i: ans.append(d)
            else:
                ans.append(d)
                ans.append(i // d)
    return ans

def solve():
    input = sys.stdin.readline
    N = int(input())
    A = [int(a) for a in input().split()]
    Count = [0] * N
    In = []
    add = 0
    for i in reversed(range(N)):
        if Count[i] % 2 == A[i]: continue
        elif (Count[i] + 1) % 2 == A[i]:
            add += 1
            In.append(i + 1)
            D = div(i + 1)
            for d in D: Count[d - 1] += 1
        else:
            print(-1)
            break
    else:
        print(add)
        print(" ".join(map(str, In)))

    return 0

if __name__ == "__main__":
    solve()

Fixed submission:
import sys

def divisor(N, B):
    i = 1
    d = []
    while i ** 2 <= N:
        if N % i == 0:
            B[i-1] = (B[i-1] + 1) % 2
            if i ** 2 < N: B[N // i - 1] = (B[N//i - 1] + 1) % 2 
        i += 1
    return 0


def solve():
    input = sys.stdin.readline
    N = int(input())
    A = [int(a) for a in input().split()]
    B = [0] * N
    ans = []
    M = 0

    for i in reversed(range(N)):
        if B[i] != A[i]:
            divisor(i+1, B)
            M += 1
            ans.append(i+1)

    print(M)
    print(" ".join(map(str, ans)))

    return 0

if __name__ == "__main__":
    solve()

Buggy python submission (verdict: Runtime Error):
import sys

def solve():
    input = sys.stdin.readline
    N = int(input())
    A = [int(a) for a in input().split()]
    Count = [0] * N
    In = []
    add = 0
    for i in reversed(range(N)):
        k = i + 1
        if A[i] != Count[i]:
            Count[i] = (Count[i] + 1) % 2
            In.append(i + 1)
            add += 1
            Count[1] = (Count[1] + 1) % 2
            for div in range(2, k):
                if div ** 2 > k: break
                if k % div == 0:
                    if div ** 2 == k: Count[div - 1] = (Count[div - 1] + 1) % 2
                    else:
                        Count[div - 1] = (Count[div - 1] + 1) % 2
                        Count[(k % div) - 1] = (Count[(k % div) - 1] + 1) % 2
    if Count[0] != A[0]: print(-1)
    else:
        print(add)
        print(" ".join(map(str, In)))

    return 0

if __name__ == "__main__":
    solve()

Fixed submission:
import sys

def divisor(N, B):
    i = 1
    d = []
    while i ** 2 <= N:
        if N % i == 0:
            B[i-1] = (B[i-1] + 1) % 2
            if i ** 2 < N: B[N // i - 1] = (B[N//i - 1] + 1) % 2 
        i += 1
    return 0


def solve():
    input = sys.stdin.readline
    N = int(input())
    A = [int(a) for a in input().split()]
    B = [0] * N
    ans = []
    M = 0

    for i in reversed(range(N)):
        if B[i] != A[i]:
            divisor(i+1, B)
            M += 1
            ans.append(i+1)

    print(M)
    print(" ".join(map(str, ans)))

    return 0

if __name__ == "__main__":
    solve()