Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
nums = list(map(int, input().split()))
ans = [0] * N

for i in reversed(range(1,N+1)):
    count = 0
    total = 0
    for j in range(i,N+1):
        if j % i == 0:
            count += 1
            # 既にfixされた数を加算
            total += ans[j-1]
    # 倍数が一つのとき
    if count == 1:
        if nums[i-1] == 0:
            ans[i-1] = 0
        else:
            ans[i-1] = 1
    # 倍数が複数ある
    else:
        # 指定が偶数
        if nums[i-1] == 0:
            if total % 2 != 0:
                ans[i-1] = 1
        else:
            if total % 2 == 0:
                ans[i-1] = 1


result = [i+1 for i in range(len(ans)) if ans[i] == 1]
result = [str(i) for i in result]
print(len(result))
print(" ".join(result))


Fixed submission:
N = int(input())
nums = list(map(int, input().split()))
ans = [0] * N

for i in reversed(range(1,N+1)):
    count = 0
    total = 0
    # 倍数
    for j in range(i, N+1, i):
        count += 1
        total += ans[j-1]
    # 倍数が一つのとき
    if count == 1:
        if nums[i-1] == 0:
            ans[i-1] = 0
        else:
            ans[i-1] = 1
    # 倍数が複数ある
    else:
        # 指定が偶数
        if nums[i-1] == 0:
            if total % 2 != 0:
                ans[i-1] = 1
        else:
            if total % 2 == 0:
                ans[i-1] = 1


# 出力フォーマット処理
result = [i+1 for i in range(len(ans)) if ans[i] == 1]
result = [str(i) for i in result]
print(len(result))
print(" ".join(result))

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
nums = list(map(int, input().split()))
ans = [0] * N

for i in reversed(range(1,N+1)):
    count = 0
    total = 0
    for j in range(i,N+1):
        if j % i == 0:
            count += 1
            # 既にfixされた数を加算
            total += ans[j-1]
    # 倍数が一つのとき
    if count == 1:
        if nums[i-1] == 0:
            ans[i-1] = 0
        else:
            ans[i-1] = 1
    # 倍数が複数ある
    else:
        # 指定が偶数
        if nums[i-1] == 0:
            if total % 2 != 0:
                ans[i-1] = 1
        else:
            if total % 2 == 0:
                ans[i-1] = 1


result = [i+1 for i in range(len(ans)) if ans[i] == 1]
result = [str(i) for i in result]
print(len(result))
print(" ".join(result))

Fixed submission:
N = int(input())
nums = list(map(int, input().split()))
ans = [0] * N

for i in reversed(range(1,N+1)):
    count = 0
    total = 0
    # 倍数
    for j in range(i, N+1, i):
        count += 1
        total += ans[j-1]
    # 倍数が一つのとき
    if count == 1:
        if nums[i-1] == 0:
            ans[i-1] = 0
        else:
            ans[i-1] = 1
    # 倍数が複数ある
    else:
        # 指定が偶数
        if nums[i-1] == 0:
            if total % 2 != 0:
                ans[i-1] = 1
        else:
            if total % 2 == 0:
                ans[i-1] = 1


# 出力フォーマット処理
result = [i+1 for i in range(len(ans)) if ans[i] == 1]
result = [str(i) for i in result]
print(len(result))
print(" ".join(result))

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

N = int(input())
nums = list(map(int, input().split()))
box = []
memo = []

tmp = [0,1]
for balls in itertools.product(tmp, repeat=N):
    box.append(list(balls))

for x in range(len(box)):
    for i in range(1, N+1):
        total = 0
        for j in range(1, N+1):
            if j % i == 0:
                total += box[x][i-1]
        if nums[i-1] != total % 2:
            break
    else:
        memo = box[x]
        break
ans = []
count = 0
for i in range(len(memo)):
    if memo[i] == 1:
        count += 1
        ans.append(i+1)

print(count)
ans = [str(n) for n in ans]
ans = " ".join(ans)
print(ans)

Fixed submission:
N = int(input())
nums = list(map(int, input().split()))
ans = [0] * N

for i in reversed(range(1,N+1)):
    count = 0
    total = 0
    # 倍数
    for j in range(i, N+1, i):
        count += 1
        total += ans[j-1]
    # 倍数が一つのとき
    if count == 1:
        if nums[i-1] == 0:
            ans[i-1] = 0
        else:
            ans[i-1] = 1
    # 倍数が複数ある
    else:
        # 指定が偶数
        if nums[i-1] == 0:
            if total % 2 != 0:
                ans[i-1] = 1
        else:
            if total % 2 == 0:
                ans[i-1] = 1


# 出力フォーマット処理
result = [i+1 for i in range(len(ans)) if ans[i] == 1]
result = [str(i) for i in result]
print(len(result))
print(" ".join(result))