Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
ax = list(map(int,input().split()))
 

boxin = []
for cnt in range(N, 0, -1):
    a = ax[cnt-1]
    
    i = 2
    memo_cnt = 0
    while 1:
        test_val = i * cnt
        if test_val > N:
            break
        if test_val in boxin:
            memo_cnt += 1
        i += 1
    if a != memo_cnt % 2:
        boxin.append(cnt)

 
box = len(boxin)
print(box)
if box != 0:
    boxin.reverse()
    print(' '.join(map(str, boxin)))

Fixed submission:
import math
N = int(input())
ax = list(map(int,input().split()))

M = 0
boxin = []
bx = [0 for _ in range(N+1)]
for cnt in range(N, 0, -1):
    a = ax[cnt-1]
    tmp = 0
    for tmp_cnt in range(cnt*2, N+1, cnt):
        if bx[tmp_cnt] != 0:
            tmp += 1
    
    if tmp % 2 != a:
        bx[cnt] = 1
        boxin.append(cnt)

box = len(boxin)
print(box)
if box != 0:
    boxin.reverse()
    print(' '.join(map(str, boxin)))

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
ax = list(map(int,input().split()))

memo = {}
memo_size = min(1000,N)
for i in range(1, memo_size+1):
    memo[i] = 0

boxin = []
for cnt in range(N, 0, -1):
    a = ax[cnt-1]
    if cnt < memo_size:
        memo_cnt = memo[cnt]
    else:
        i = 2
        memo_cnt = 0
        while 1:
            test_val = i * cnt
            if test_val > N:
                break
            if test_val in boxin:
                memo_cnt += 1
            i += 1
    if a != memo_cnt % 2:
        boxin.append(cnt)
        for i in range(1,memo_size+1):
            if cnt % i == 0:
                memo[i] += 1

box = len(boxin)
print(box)
if box != 0:
    boxin.reverse()
    print(' '.join(map(str, boxin)))

Fixed submission:
import math
N = int(input())
ax = list(map(int,input().split()))

M = 0
boxin = []
bx = [0 for _ in range(N+1)]
for cnt in range(N, 0, -1):
    a = ax[cnt-1]
    tmp = 0
    for tmp_cnt in range(cnt*2, N+1, cnt):
        if bx[tmp_cnt] != 0:
            tmp += 1
    
    if tmp % 2 != a:
        bx[cnt] = 1
        boxin.append(cnt)

box = len(boxin)
print(box)
if box != 0:
    boxin.reverse()
    print(' '.join(map(str, boxin)))

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
ax = list(map(int,input().split()))

memo = {}
memo_size = min(100,N)
for i in range(1, memo_size+1):
    memo[i] = 0

boxin = []
for cnt in range(N, 0, -1):
    a = ax[cnt-1]
    if cnt < memo_size:
        memo_cnt = memo[cnt]
    else:
        i = 2
        memo_cnt = 0
        while 1:
            test_val = i * cnt
            if test_val > N:
                break
            if test_val in boxin:
                memo_cnt += 1
            i += 1
    if a != memo_cnt % 2:
        boxin.append(cnt)
        for i in range(1,memo_size+1):
            if cnt % i == 0:
                memo[i] += 1

box = len(boxin)
print(box)
if box != 0:
    boxin.reverse()
    print(' '.join(map(str, boxin)))

Fixed submission:
import math
N = int(input())
ax = list(map(int,input().split()))

M = 0
boxin = []
bx = [0 for _ in range(N+1)]
for cnt in range(N, 0, -1):
    a = ax[cnt-1]
    tmp = 0
    for tmp_cnt in range(cnt*2, N+1, cnt):
        if bx[tmp_cnt] != 0:
            tmp += 1
    
    if tmp % 2 != a:
        bx[cnt] = 1
        boxin.append(cnt)

box = len(boxin)
print(box)
if box != 0:
    boxin.reverse()
    print(' '.join(map(str, boxin)))