Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
N=int(input())
a=list(map(int,input().split()))
a0 = a[0]
def make_divisors(n):
    divisors = []
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n//i)

    # divisors.sort()
    return divisors
ma = N
mi = N//2
for i in range(len(bin(N))-2):
    for j in range(ma,mi,-1):
        if a[j-1]%2==1:
            tg_list = make_divisors(j)
            for k in tg_list:
                if k!=j:
                    a[k-1] += 1
    #a[mi//2:mi] %= 2
    #print(a)
    ma = mi
    mi = mi//2
if sum(a)%2 == a0:
    #print(a)
    res = [str(i+1) for i in range(N) if a[i]%2==1]
    M = len(res)
    print(M)
    if M!=0:
        print(' '.join(res))
else:
    print(-1)


Fixed submission:
import sys
input = sys.stdin.readline
N=int(input())
a=list(map(int,input().split()))
a0 = a[0]
def make_divisors(n):
    divisors = []
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n//i)

    # divisors.sort()
    return divisors
ma = N
mi = N//2
for i in range(len(bin(N))-2):
    for j in range(ma,mi,-1):
        if a[j-1]%2==1:
            tg_list = make_divisors(j)
            for k in tg_list:
                if k!=j:
                    a[k-1] += 1
    #a[mi//2:mi] %= 2
    #print(a)
    ma = mi
    mi = mi//2
if sum(a)%2 == a0:
    #print(a)
    res = [str(i+1) for i in range(N) if a[i]%2==1]
    M = len(res)
    print(M)
    if M!=0:
        print(' '.join(res))
else:
    print(-1)

Buggy python submission (verdict: Time Limit Exceeded):
import numpy as np
N=int(input())
a=np.array(list(map(int,input().split())))
a0 = a[0]
def make_divisors(n):
    divisors = []
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n//i)

    # divisors.sort()
    return divisors
ma = N
mi = N//2
for i in range(len(bin(N))-2):
    for j in range(ma,mi,-1):
        if a[j-1]==1:
            tg_list = make_divisors(j)
            for k in tg_list:
                if k!=j:
                    a[k-1] += 1
    a %= 2
    #print(a)
    ma = mi
    mi = mi//2
if sum(a)%2 == a0:
    #print(a)
    res = [str(i+1) for i in range(N) if a[i]==1]
    print(len(res))
    if len(res)!=0:
        print(' '.join(res))
else:
    print(-1)


Fixed submission:
import sys
input = sys.stdin.readline
N=int(input())
a=list(map(int,input().split()))
a0 = a[0]
def make_divisors(n):
    divisors = []
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n//i)

    # divisors.sort()
    return divisors
ma = N
mi = N//2
for i in range(len(bin(N))-2):
    for j in range(ma,mi,-1):
        if a[j-1]%2==1:
            tg_list = make_divisors(j)
            for k in tg_list:
                if k!=j:
                    a[k-1] += 1
    #a[mi//2:mi] %= 2
    #print(a)
    ma = mi
    mi = mi//2
if sum(a)%2 == a0:
    #print(a)
    res = [str(i+1) for i in range(N) if a[i]%2==1]
    M = len(res)
    print(M)
    if M!=0:
        print(' '.join(res))
else:
    print(-1)