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

N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

for i in reversed(list(range(1,N+1))):
    Xsum = 0
    j = 2
    while(i*j =< N):
        Xsum += X[i*j]
        j += 1
        continue
    odd = Xsum % 2
    if odd == A[i]:
        X[i] = 0
    else:
        X[i] = 1
    



def umeru(X, M, last):
    #print('---')
    for i in reversed(list(range(N//(M+1)+1, N//M+1))):
        if M == 1:
            X[i] = A[i]
        else:
            Xsum = 0
            j = 2
            while(i*j < N):
                Xsum += X[i*j]
                j += 1
                continue
            odd = Xsum % 2
            #print(M, i, odd, A[i])
            if odd == A[i]:
                X[i] = 0
            else:
                X[i] = 1
    #print(N,M,X)
    if last:
        return
    if N//(M+1) == 0:
        umeru(X, M+1, True)
    else:
        umeru(X, M+1, False)

#umeru(X, 1, False)
#print(X)

M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)
if M == 0:
    sys.exit()

xxx = []
for i in range(1, N+1):
    if X[i] == 1:
        xxx.append(str(X[i]))

print(' '.join(xxx))


Fixed submission:
import sys

N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

for i in reversed(list(range(1,N+1))):
    Xsum = 0
    j = 2
    while(i*j <= N):
        Xsum += X[i*j]
        j += 1
        continue
    odd = Xsum % 2
    if odd == A[i]:
        X[i] = 0
    else:
        X[i] = 1
    
M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)
if M == 0:
    sys.exit()

xxx = []
for i in range(1, N+1):
    if X[i] == 1:
        xxx.append(str(i))

print(' '.join(xxx))

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

N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

for i in reversed(list(range(1,N+1))):
    Xsum = 0
    j = 2
    while(i*j < N):
        Xsum += X[i*j]
        j += 1
        continue
    odd = Xsum % 2
    if odd == A[i]:
        X[i] = 0
    else:
        X[i] = 1
    



def umeru(X, M, last):
    #print('---')
    for i in reversed(list(range(N//(M+1)+1, N//M+1))):
        if M == 1:
            X[i] = A[i]
        else:
            Xsum = 0
            j = 2
            while(i*j < N):
                Xsum += X[i*j]
                j += 1
                continue
            odd = Xsum % 2
            #print(M, i, odd, A[i])
            if odd == A[i]:
                X[i] = 0
            else:
                X[i] = 1
    #print(N,M,X)
    if last:
        return
    if N//(M+1) == 0:
        umeru(X, M+1, True)
    else:
        umeru(X, M+1, False)

#umeru(X, 1, False)
#print(X)

M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)
if M == 0:
    sys.exit()

xxx = []
for i in range(1, N+1):
    if X[i] == 1:
        xxx.append(X[i])

print(' '.join(xxx))


Fixed submission:
import sys

N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

for i in reversed(list(range(1,N+1))):
    Xsum = 0
    j = 2
    while(i*j <= N):
        Xsum += X[i*j]
        j += 1
        continue
    odd = Xsum % 2
    if odd == A[i]:
        X[i] = 0
    else:
        X[i] = 1
    
M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)
if M == 0:
    sys.exit()

xxx = []
for i in range(1, N+1):
    if X[i] == 1:
        xxx.append(str(i))

print(' '.join(xxx))

Buggy python submission (verdict: Runtime Error):
N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

def umeru(X, M, last):
    #print('---')
    for i in reversed(list(range(N//(M+1)+1, N//M+1))):
        if M == 1:
            X[i] = A[i]
        else:
            Xsum = 0
            j = 2
            while(i*j < N):
                Xsum += X[i*j]
                j += 1
                continue
            odd = Xsum % 2
            #print(M, i, odd, A[i])
            if odd == A[i]:
                X[i] = 0
            else:
                X[i] = 1
    #print(N,M,X)
    if last:
        return
    if N//(M+1) == 0:
        umeru(X, M+1, True)
    else:
        umeru(X, M+1, False)

umeru(X, 1, False)
#print(X)

M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)

for i in range(1, N+1):
    if X[i] == 1:
        print(i, end=' ')


print()


Fixed submission:
import sys

N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

for i in reversed(list(range(1,N+1))):
    Xsum = 0
    j = 2
    while(i*j <= N):
        Xsum += X[i*j]
        j += 1
        continue
    odd = Xsum % 2
    if odd == A[i]:
        X[i] = 0
    else:
        X[i] = 1
    
M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)
if M == 0:
    sys.exit()

xxx = []
for i in range(1, N+1):
    if X[i] == 1:
        xxx.append(str(i))

print(' '.join(xxx))

Buggy python submission (verdict: Runtime Error):
N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

def umeru(X, M, last):
    #print('---')
    for i in reversed(list(range(N//(M+1)+1, N//M+1))):
        if M == 1:
            X[i] = A[i]
        else:
            Xsum = 0
            j = 2
            while(i*j < N):
                Xsum += X[i*j]
                j += 1
                continue
            odd = Xsum % 2
            #print(M, i, odd, A[i])
            if odd == A[i]:
                X[i] = 0
            else:
                X[i] = 1
    #print(N,M,X)
    if last:
        return
    if N//(M+1) == 0:
        umeru(X, M+1, True)
    else:
        umeru(X, M+1, False)

umeru(X, 1, False)
print(X)

M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)

for i in range(1, N+1):
    if X[i] == 1:
        print(i, end=' ')


print()


Fixed submission:
import sys

N = int(input())
Atmp = [0] + list(map(int, input().split()))
A = {}

for i,a in enumerate(Atmp):
    A[i] = a

#print(A)

X = {}

for i in reversed(list(range(1,N+1))):
    Xsum = 0
    j = 2
    while(i*j <= N):
        Xsum += X[i*j]
        j += 1
        continue
    odd = Xsum % 2
    if odd == A[i]:
        X[i] = 0
    else:
        X[i] = 1
    
M = 0
for i in range(1, N+1):
    if X[i] == 1:
        M += 1

print(M)
if M == 0:
    sys.exit()

xxx = []
for i in range(1, N+1):
    if X[i] == 1:
        xxx.append(str(i))

print(' '.join(xxx))