qyliang/CodeNanoFix huggingface dataset:
# Buggy code:
n = int(input())
a = list(map(int, input().split()))
ans = []
for i in range(n-1, -1, -1):
    if sum(a[i:n:i+1])%2!=a[i]:
        a[i]+=1
        ans.append(i+1)
a.sort()
print(len(ans))
print(*ans)

# Fixed code:
n = int(input())
a = list(map(int, input().split()))
res = [0]*n
ans = []
for i in range(n-1, -1, -1):
    if sum(res[i::i+1])%2!=a[i]:
        res[i] = 1
        ans.append(i+1)
a.sort()
print(len(ans))
print(*ans)
# Buggy code:
N = int(input())
b = list(map(int,input().split()))
box = [0 for i in range(N)]

for i in range(N-1,-1,-1):
  rest = 0
  for j in range(2 * (i+1),N+1,i+1):
    rest += box[j-1]
  box[i] = (b[i] - rest)%2
print(sum(box))

# Fixed code:
N = int(input())
b = list(map(int,input().split()))
box = [0 for i in range(N)]

for i in range(N-1,-1,-1):
  rest = 0
  for j in range(2 * (i+1),N+1,i+1):
    rest += box[j-1]
  box[i] = (b[i] - rest)%2
print(sum(box))
if sum(box):
  for idx,i in enumerate(box):
    if i == 1:
      print(idx+1)
# Buggy code:
# -*- coding: utf-8 -*-
n = int(input())
al = list(map(int, input().split()))

bl = [0]*n
for i in range(n,0,-1):
    if i*2>n:
        if al[i-1]>0:
            bl[i-1] = 1
        continue

    c = 2
    s = 0
    while i*c<=n:
        s += bl[i*c-1]
        c += 1
    if al[i-1]==1:
        bl[i-1] = 1 if s%2==0 else 0
    else:
        bl[i-1] = 0 if s%2==0 else 1

print(*bl)

# Fixed code:
# -*- coding: utf-8 -*-
n = int(input())
al = list(map(int, input().split()))

bl = [0]*n
for i in range(n,0,-1):
    if i*2>n:
        if al[i-1]>0:
            bl[i-1] = 1
        continue

    c = 2
    s = 0
    while i*c<=n:
        s += bl[i*c-1]
        c += 1
    if al[i-1]==1:
        bl[i-1] = 1 if s%2==0 else 0
    else:
        bl[i-1] = 0 if s%2==0 else 1

res = []
for i in range(1,n+1):
    if bl[i-1]>0:
        res.append(i)

print(len(res))
if len(res)>0:
    print(*res)
# Buggy code:
import numpy as np
N = int(input())
a = np.array([0]+list(map(int,input().split())))
ans = []
for i in range(N,0,-1):
  b = [i*j for j in range(2,N//i+1)]
  print(b)
  c = sum(a[b])%2+0
  if c!=a[i]:
    ans.append(i)
print(len(ans))
for i in range(len(ans)):
  print(ans[i],end=" ")

# Fixed code:
#import numpy as np
N = int(input())
a = [0]+list(map(int,input().split()))
ans = [0]*(N+1)
an = []
for i in range(N,0,-1):
  c =0
  b = [i*j for j in range(2,N//i+1)]
  for j in b:
    c +=ans[j]
  c = c%2
  if c!=a[i]:
    ans[i]=1
    an.append(i)
print(len(an))
for i in range(len(an)):
  print(an[i],end=" ")
# Buggy code:
A=[0]+list(map(int,input().split()))
B=[0 for i in range(N+1)]
ans=[]


for i in range(1,N+1):
    cnt=0
    n=N+1-i
    for j in range(1,10**5):
        #print(n,n*j)
        if n*j>N:
            break
        else:
            if B[n*j]==1:
                cnt+=1
    if cnt%2!=A[n]:
        B[n]+=1
        ans.append(n)
ans.sort()
print(len(ans))
print(*ans)


# Fixed code:
N=int(input())
A=[0]+list(map(int,input().split()))
B=[0 for i in range(N+1)]
ans=[]
for i in range(1,N+1)[::-1]:
    #print(i)
    cnt=0
    for j in range(1,N+1):
        #print(i,j)
        if j*i>N:
            break
        if B[j*i]==1:
            cnt+=1
    if A[i]%2!=cnt%2:
        B[i]=1
        ans.append(i)
print(len(ans))
ans.sort()
print(*ans)
#print(A)
# Buggy code:
n=int(input())
a=list(map(int,input().split()))
cnt=[]
def divis(n):
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            a[i-1]^=1
            if i != n // i :
                ij=n//i
                a[ij-1]^=1
for i in reversed(range(n)):
    if a[i]==1:
        cnt.append(i+1)
        divis(i+1)
if len(cnt)>0:
    print(*cnt)
else:
    print(0)



# Fixed code:
n=int(input())
a=list(map(int,input().split()))
cnt=[]
def divis(n):
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            a[i-1]^=1
            if i != n // i :
                ij=n//i
                a[ij-1]^=1
for i in reversed(range(n)):
    if a[i]==1:
        cnt.append(i+1)
        divis(i+1)
if len(cnt)>0:
    print(len(cnt))
    print(*cnt)
else:
    print(0)
# Buggy code:
N = int(input())
a = [0]+list(map(int, input().split())) # 1-indexed

b = [0]*(N+1)
for i in range(N,0,-1):
    if N//i == 1:
        b[i] = a[i]
    else:
        tmp = a[i]
        loop = N//i
        index = i*loop
        for j in range(loop):
            if j == loop-1: # end
                b[i] = tmp
            else:
                tmp = (tmp+b[index])%2
                index -= i
for e in b[1:]:
    print(e, end=" ")

# Fixed code:
N = int(input())
a = [0]+list(map(int, input().split())) # 1-indexed

b = [0]*(N+1)
for i in range(N,0,-1):
    if N//i == 1:
        b[i] = a[i]
    else:
        tmp = a[i]
        loop = N//i
        index = i*loop
        for j in range(loop):
            if j == loop-1: # end
                b[i] = tmp
            else:
                tmp = (tmp+b[index])%2
                index -= i
print(sum(b))
for i in range(1,N+1):
    if b[i] == 1:
        print(i, end=" ")
# Buggy code:
N = int(input())
A = list(map(int,input().split()))
ans = []

for i in range(N-1,-1,-1) :
    num = i+1
    cnt = 0
    for j in range(i,N,i+1) :
        cnt += A[i]
    
    if A[i] == 1 :
        if cnt % 2 == 0 :
            ans.append(i+1)
    
    elif A[i] != cnt % 2 :
        ans = -1
        break
if ans == -1 :
    print(ans)
else :
    print(len(ans))
    print(*ans, sep="\n")
    


# Fixed code:
N = int(input())
A = list(map(int,input().split()))
B = [0]*N
ans = []

for i in range(N-1,-1,-1) :
    num = i+1
    cnt = 0
    for j in range(i+num,N,num) :
        cnt += B[j]
    
    if A[i] != cnt % 2 :
        ans.append(i+1)
        B[i] = 1
    
print(len(ans))
print(*ans, sep="\n")
# Buggy code:
n = int(input())
a = list(map(int, input().split()))

b =[0]*(n+1)

for i in range(n):
  j = n-i
  sum = 0
  m = 1
  while j*m <= n:
    sum += b[j*m]
    m += 1
  if sum % 2 != a[j-1]:
    b[j] = 1  
    
print(1)

ans =[]

if not 1 in b:
  print(0)
else:
  for i in range(n+1):
    if b[i] == 1:
      print(i, end =' ')


# Fixed code:
n = int(input())
a = list(map(int, input().split()))

b =[0]*(n+1)

ans = 0

for i in range(n):
  j = n-i
  sum = 0
  m = 1
  while j*m <= n:
    sum += b[j*m]
    m += 1
  if sum % 2 != a[j-1]:
    b[j] = 1 
    ans += 1
    


if not 1 in b:
  print(0)
else:
  print(ans)
  for i in range(n+1):
    if b[i] == 1:
      print(i, end =' ')
# Buggy code:
n = int(input())
a = tuple(map(int, input().split()))
b = [0] * n
ret = 0
ret2 = []
append = ret2.append
for i in range(n, 0, -1):
  count = 0
  for j in range(i+i, n+1, i):
    count += b[j-1]
  # print((i, count))
  if not (count % 2) == a[i-1]:
    b[i-1] = 1
    ret += 1
    append(i)

# print(b)
print(ret)
if ret == 0:
  exit()

# print(*reversed(ret2))

for i in range(n-1, -1, -1):
  if b[i] == 1:
    print('%d ' % i, end="")


# Fixed code:
n = int(input())
a = tuple(map(int, input().split()))
b = [0] * n
ret = 0
ret2 = []
append = ret2.append
for i in range(n, 0, -1):
  count = 0
  for j in range(i+i, n+1, i):
    count += b[j-1]
  # print((i, count))
  if not (count % 2) == a[i-1]:
    b[i-1] = 1
    ret += 1
    append(i)

# print(b)
print(ret)
if ret == 0:
  exit()

# print(*reversed(ret2))

for i in range(n):
  if b[i] == 1:
    print('%d ' % (i+1), end="")
# Buggy code:
N = int(input())
As = list(map(int, input().split()))

res = [0] * N
for idx, ai in zip(np.arange(N-1, -1, -1), As[::-1]):
    oe = sum([res[i] for i in range(idx, N, idx+1)]) % 2#
    res[idx] = ai ^ oe

print(sum(res))
idxs = []
for i, val in enumerate(res):
    if val:
        idxs += [i + 1]
print(*idxs)

# Fixed code:
N = int(input())
As = list(map(int, input().split()))

res = [0] * N
for idx, ai in zip(range(N-1, -1, -1), As[::-1]):
    oe = sum([res[i] for i in range(idx, N, idx+1)]) % 2#
    res[idx] = ai ^ oe

print(sum(res))
idxs = []
for i, val in enumerate(res):
    if val:
        idxs += [i + 1]
print(*idxs)
# Buggy code:
n = int(input())
a = [0] + list(map(int, input().split()))
for i in range(n // 2, 0, -1):
    a[i] ^= a[i * 2::i]

s = [i for i, b in enumerate(a) if b]
print(len(s))
print(*s)


# Fixed code:
n = int(input())
a = [0] + list(map(int, input().split()))
for i in range(n // 2, 0, -1):
    a[i] = sum(a[i::i]) % 2

s = [i for i, b in enumerate(a) if b]
print(len(s))
print(*s)
# Buggy code:

N = int(input())
A = list(map(int,input().split()))



NumValid = [True] * (N+1)
ans = []
NumAns = [0] * (N+1)


for i in reversed(range(1,N+1)):
    j = 2 * i
    tmp = 0
    while j < N+1:
        tmp += NumAns[j]
        j += i
        
    if tmp % 2 == 0:
        if A[i] == 0:
            NumAns[i] = 0
        else:
            NumAns[i] = 1
            ans.append(i)
    else:
        if A[i] == 0:
            NumAns[i] = 1
            ans.append(i)
        else:
            NumAns[i] = 0
        
print(len(ans))
print(ans)

# Fixed code:

N = int(input())
A = list(map(int,input().split()))



NumValid = [True] * (N+1)
ans = []
NumAns = [0] * (N+1)


for i in reversed(range(1,N+1)):
    j = 2 * i
    tmp = 0
    while j < N+1:
        tmp += NumAns[j]
        j += i
        
    if tmp % 2 == 0:
        if A[i-1] == 0:
            NumAns[i] = 0
        else:
            NumAns[i] = 1
            ans.append(i)
    else:
        if A[i-1] == 0:
            NumAns[i] = 1
            ans.append(i)
        else:
            NumAns[i] = 0
        
print(len(ans))
print(' '.join(map(str,ans)))
# Buggy code:
n=int(input())
a=[int(i) for i in input().split()]


li=[]
for i in range(n,0,-1):
    if a[i-1]==1:
        if sum(li[i::i])%2==0:
            li.append(i)
        else:
            print(-1)
            exit()
    else:
        if sum(li[i::i])%2==1:
            li.append(i)
        else:
            print(-1)
            exit()

if li:
    print(len(li))
    print(*li)
else:
    print(0)

# Fixed code:
n=int(input())
a=[int(i) for i in input().split()]


li=[0]*(n+1)
ans=[]
for i in range(n,0,-1):
    if a[i-1]==1:
        if sum(li[i::i])%2==0:
            li[i]=1
            ans.append(i)
    else:
        if sum(li[i::i])%2==1:
            li[i]=1
            ans.append(i)

print(len(ans))
print(*ans)
# Buggy code:

url = "https://atcoder.jp//contests/abc134/tasks/abc134_d"

def main():
    n = int(input())
    a = [0]
    a.extend(list(map(int, input().split())))
    balls = [0]*(n+1)
    b = {}
    for i in range(n, 0, -1):
        ball = 0
        for j in range(i, n, i):
            ball += balls[j]
        if ball % 2 != a[i]:
            if ball % 2 >= 2:
                print(-1)
                exit()
            a[i] = 1
            b[i] = 1
    if len(b) == 0:
        print(0)
        exit()
    else:
        print(len(b))
    ks = sorted(b.items(), key=lambda x:x[0])
    for k in ks:
        print(k, end=" ")


if __name__ == '__main__':
    main()


# Fixed code:

url = "https://atcoder.jp//contests/abc134/tasks/abc134_d"

def main():
    n = int(input())
    a = [0]
    a.extend(list(map(int, input().split())))
    balls = [0]*(n+1)
    b = {}
    for i in range(n, 0, -1):
        ball = 0
        for j in range(i, n+1, i):
            ball += balls[j]
        if ball % 2 != a[i]:
            b[i] = 1
            balls[i] = 1
    if len(b) == 0:
        print(0)
        exit()
    else:
        print(len(b))
    ks = sorted(b.items(), key=lambda x:x[0])
    for k in ks:
        print(k[0], end=" ")


if __name__ == '__main__':
    main()
# Buggy code:
N = int(input())
a = list(map(int, input().split()))
l = [0 for i in range(N)]
ans = []
memo = 0
cnt = 0
for i in reversed(range(N)):
    j = 2
    while (i+1)*j <= N:
        memo += a[(i+1)*j-1]
        j += 1
    memo = memo%2
    if memo != a[i]:
        l[i] = 1
        cnt += 1
        ans.append(str(i))
ans.sort()
print(cnt)
print(" ".join(ans))

# Fixed code:
N = int(input())
a = list(map(int, input().split()))
l = [0 for i in range(N)]
ans = []
cnt = 0
for i in reversed(range(N)):
    j = 2
    memo = 0
    while (i+1)*j <= N:
        memo += l[(i+1)*j-1]
        j += 1
    memo = memo%2
    
    if memo != a[i]:
        l[i] = 1
        cnt += 1
        ans.append(str(i+1))
ans.sort()
print(cnt)
print(" ".join(ans))
# Buggy code:
N = int(input())
a = list(map(int, input().split()))
b = []
c = []
for i in range(N):
    if i<N//2:
        b.append(-1)
    else:
        b.append(a[i])

for i in reversed(range(N//2)):
    t = 1
    s = 0
    while (i+1)*(t+1)<=N:
        s+=b[(i+1)*(t+1)-1]
        t+=1
    if s%2 != a[i]:
        b[i]=1
    else:
        b[i]= 0
#print(b)

bo = False
for j in range(N):
    if b[j]==1:
        bo = True
        c.append(str(j+1))
if bo:
    print("".join(c))
else:
    print(0)

# Fixed code:
N = int(input())
a = list(map(int, input().split()))
b = []
c = []
for i in range(N):
    if i<N//2:
        b.append(-1)
    else:
        b.append(a[i])

for i in reversed(range(N//2)):
    t = 1
    s = 0
    while (i+1)*(t+1)<=N:
        s+=b[(i+1)*(t+1)-1]
        t+=1
    if s%2 != a[i]:
        b[i]=1
    else:
        b[i]= 0
#print(b)

bo = False
for j in range(N):
    if b[j]==1:
        bo = True
        c.append(str(j+1))
if bo:
    print(len(c))
    print(" ".join(c))
else:
    print(0)
# Buggy code:
n = int(input())
a = list(map(int, input().split()))
a = [0] + a
 
c = [0] * (n+1)
 
for i in range(n, 0, -1):
    c[i] = a[i]
    tmp = i * 2
    while tmp <= n:
        c[i] -= c[tmp]
        tmp += i
    c[i] = c[i] % 2
    
for i in range(1, n+1):
    if c[i] == 1:
        print(i)

# Fixed code:
n = int(input())
a = list(map(int, input().split()))
a = [0] + a
 
c = [0] * (n+1)
 
for i in range(n, 0, -1):
    c[i] = a[i]
    tmp = i * 2
    while tmp <= n:
        c[i] -= c[tmp]
        tmp += i
    c[i] = c[i] % 2
    
print(sum(c))
for i in range(1, n+1):
    if c[i] == 1:
        print(i)
# Buggy code:
N = int(input())
a = list(map(int,input().split()))
b = [0]*N
bina = 0
M = 0
for i in reversed(range(1,N+1)):
    next_num = i+i
    while(next_num <= N):
        bina ^= a[next_num-1]
        next_num += i
    b[i-1] = bina*a[i-1]
    bina = 0
M = sum(b)
print(M)
for i in range(N):
    if(b[i] == 1):
        print(i+1)

# Fixed code:
N = int(input())
a = list(map(int,input().split()))
b = [0]*N
bina = 0
M = 0
for i in reversed(range(1,N+1)):
    next_num = i+i
    while(next_num <= N):
        bina ^= b[next_num-1]
        next_num += i
    b[i-1] = bina^a[i-1]
    bina = 0
M = sum(b)
print(M)
for i in range(N):
    if(b[i] == 1):
        print(i+1)
# Buggy code:
N=int(input())
a=list(map(int,input().split()))
b=[0]*N
for i in reversed(range(N)):
  k= N // (i+1)
  tmp=0
  for j in range(1,k):
    tmp+=b[i*(j+1)]
  b[i]=(tmp%2)-a[i]
M=sum(b)
ans=[]
for i in range(N):
  if b[i]==1:
    ans.append(i+1)
print(M)
print(" ".join(map(str,ans)))
    

# Fixed code:
N=int(input())
a=list(map(int,input().split()))
b=[0]*N
for i in reversed(range(N)):
  k= N // (i+1)
  tmp=0
  for j in range(1,k):
    tmp+=b[(i+1)*(j+1)-1]
  b[i]=abs((tmp%2)-a[i])
M=sum(b)
ans=[]
for i in range(N):
  if b[i]==1:
    ans.append(i+1)
print(M)
print(" ".join(map(str,ans)))
# Buggy code:
M = int(input())
a = list(map(int,input().split()))
a = [None]+a
b = [M-k for k in range(M)]
c = [0 for k in range(M+1)]
for s in b:
	w = M // s
	wa = 0
	for k in range(w):
		wa += c[s*(k+1)]
		if wa %2 == a[s]:
			c[s] = 0
		else:
			c[s] = 1
for k in range(1,len(c)):
	if c[k] == 1:
		print(k, end="")
		print(" ", end="")

# Fixed code:
M = int(input())
a = list(map(int,input().split()))
a = [None]+a
b = [M-k for k in range(M)]
c = [0 for k in range(M+1)]
h = 0
for s in b:
	w = M // s
	wa = 0
	for k in range(w-1):
		wa += c[s*(k+2)]
	if wa % 2 == a[s]:
		c[s] = 0
	else:
		c[s] = 1
		h += 1
print(h)
for k in range(1,len(c)):
	if c[k] == 1:
		print(k, end=" ")
# Buggy code:
n = int(input())
a = list(map(int, input().split()))
b = [0 for _ in range(n)]
c = []

for i in range(n,0,-1):
    tmp = sum(b[i-1::i])
    if tmp%2!=a[i-1]:
        b[i-1] = 1
        c.append(str(i))
        
print(len(c))
if len(c)!=0:
    print(*c)
else:
    print('0')

# Fixed code:
n = int(input())
a = list(map(int, input().split()))
b = [0 for _ in range(n)]
c = []

for i in range(n,0,-1):
    tmp = sum(b[i-1::i])
    if tmp%2!=a[i-1]:
        b[i-1] = 1
        c.append(str(i))
        
print(len(c))
if len(c)!=0:
    print(" ".join(c))
# Buggy code:
#import numpy as np

n = int(input())
a_s = list(map(int, input().split()))

n = 3
a_s =[1,0,0]

ans = [0]*(n+1)
#ans = np.zeros(n+1).astype(int)


i=1
for i in range(n,0,-1):
    sum_num = 0
    for j in range(i,n+1,i):
        sum_num += ans[j]

    if((sum_num & 1) != a_s[i-1]):
        ans[i] = 1

print(' '.join(map(str,ans[1:])))    


# Fixed code:
#import numpy as np

n = int(input())
a_s = list(map(int, input().split()))

m = 0
ans = [0]*(n+1)
#ans = np.zeros(n+1).astype(int)


i=1
for i in range(n,0,-1):
    sum_num = 0
    for j in range(i,n+1,i):
        sum_num += ans[j]

    if((sum_num & 1) != a_s[i-1]):
        m += 1
        ans[i] = 1

ans2 = []
for i in range(1,n+1):
    if ans[i]==1:
        ans2.append(i)

print(m)
print(' '.join(map(str,ans2)))
# Buggy code:
N = int(input())
A = list(map(int, input().split()))
B = [0]*(N+1)
ans = []
 
for n in range(N):
  i = N-n
  BB = B[::i]
  if (sum(BB))%2 != A[i-1]:
    B[i] = 1
    ans.append(str(i))
  
print(len(x))
print(' '.join(ans))

# Fixed code:
N = int(input())
A = list(map(int, input().split()))
B = [0]*(N+1)
x = []

for n in range(N):
  i = N-n
  BB = B[::i]
  if (sum(BB))%2 == A[i-1]:
    B[i] = 0
  else:
    B[i] = 1
    x.append(str(i))
  
if len(x) == 0:
  print(0)
else:
  print(len(x))
  print(' '.join(x))
# Buggy code:
n = int(input())
a = list(map(int, input().split()))

ans = [0] * n

for i in reversed(range(1, n+1)):
    count = 0
    for j in range(i+1, n+1, i):
        count += ans[j-1]

    if count % 2 != a[i-1]:
        ans[i-1] = 1

for _ans in ans:
    print(_ans)


# Fixed code:
n = int(input())
a = list(map(int, input().split()))

ans = [0] * n

for i in reversed(range(1, n+1)):
    count = 0
    for j in range(2 * i, n + 1, i):
        count += ans[j-1]

    if count % 2 != a[i-1]:
        ans[i-1] = 1

print(sum(ans))
for i in range(n):
    if ans[i] == 1:
        print(i + 1)
# Buggy code:
from sys import stdin

N = int(stdin.readline())
a = list(map(int, stdin.readline().split()))
A = [0] + a
B = [0]*(N+1)
putBall = []

for i in range(N, 2, -1):
    cnt = 1
    multiple = i
    tmp = 0
    while multiple <= N:
        tmp += B[multiple]
        cnt += 1
        multiple *= cnt
    if tmp%2 != A[i]:
        B[i] = 1
        putBall.append("%d" % i)
print(sum(B))
print(" ".join(putBall))

# Fixed code:
from sys import stdin

N = int(stdin.readline())
a = list(map(int, stdin.readline().split()))
A = [0] + a
B = [0]*(N+1)
putBall = []

for i in range(N, 0, -1):
    cnt = 1
    multiple = i
    tmp = 0
    if sum(B[i::i])%2 != A[i]:
        B[i] = 1
        putBall.append("%d" % i)

print(sum(B))
print(*putBall)
# Buggy code:
n = int(input())
a = [int(input()) for _ in range(n)]

dp = [float('inf')]*n
for i in range(n):
    x = bisect.bisect_right(dp,-a[i])
    dp[x] = -a[i]
c = dp.count(float('inf'))
print(n-c)

# Fixed code:
import bisect
n = int(input())
a = [int(input()) for _ in range(n)]

dp = [float('inf')]*n
for i in range(n):
    x = bisect.bisect_right(dp,-a[i])
    dp[x] = -a[i]
c = dp.count(float('inf'))
print(n-c)
# Buggy code:
import bisect
N=int(input())
A=[int(input()) for _ in range(N)]
color=[]
A=A[::-1]
for a in A:
    i=bisect.bisect_left(color,a)
    if i==len(color):
        color.append(a)
    else:
        color[i]=a
print(len(color))

# Fixed code:
import bisect
N=int(input())
A=[int(input()) for _ in range(N)]
color=[]
A=A[::-1]
for a in A:
    i=bisect.bisect_right(color,a)
    if i==len(color):
        color.append(a)
    else:
        color[i]=a
print(len(color))
# Buggy code:
n=int(input())
a=[int(input()) for _ in range(n)]
ans=[a[0]]
ansl=1
from bisect import bisect_right
for ai in a[1:]:
  tmp=bisect_right(ans,ai)
  if tmp<ansl:
    ans[tmp]=ai
  else:
    ans.append(ai)
    ansl+=1
print(ansl)

# Fixed code:
n=int(input())
a=[int(input()) for _ in range(n)]
ans=[-a[0]]
ansl=1
from bisect import bisect_right
for ai in a[1:]:
  tmp=bisect_right(ans,-ai)
  if tmp<ansl:
    ans[tmp]=-ai
  else:
    ans.append(-ai)
    ansl+=1
print(ansl)
# Buggy code:
import bisect

N = int(input())
A = [int(input()) for i in range(N)]

ans = 1
X = [-A[0]]
for i in range(1,N):
    if -X[ans-1] > A[i]:
        X.append(-A[i])
        ans += 1
    else:
        pos = bisect.bisect_left(X,-A[i])
        X[pos] = -A[i]

print(ans)


# Fixed code:
import bisect

N = int(input())
A = [int(input()) for i in range(N)]

ans = 1
X = [-A[0]]
for i in range(1,N):
    if -X[ans-1] >= A[i]:
        X.append(-A[i])
        ans += 1
    else:
        pos = bisect.bisect_right(X,-A[i])
        X[pos] = -A[i]

print(ans)
# Buggy code:
from bisect import bisect

n = int(input())
ma = [-int(input()) for _ in range(n)]

ans = [ma[0]]
for ai in ma[1:]:
    tmp = bisect(ans, ai)
    if tmp == len(ans):
        ans.append(ai)
    elif tmp < len(ans):
        ans[tmp] = ai
    print(ans)
print(len(ans))


# Fixed code:
from bisect import bisect

n = int(input())
ma = [-int(input()) for _ in range(n)]

ans = [ma[0]]
for ai in ma[1:]:
    tmp = bisect(ans, ai)
    if tmp == len(ans):
        ans.append(ai)
    elif tmp < len(ans):
        ans[tmp] = ai
print(len(ans))
# Buggy code:
from bisect import bisect

icase=1
if icase==1:
    n=int(input())
    a=[0]*n
    for i in range(n):
        a[i]=-int(input())
elif icase==2:
    n=5
    a=[-2,-1,-4,-5,-3]
elif icase==3:
    n=4
    a=[0,0,0,0]

def loopa():

    n=len(a)
    dp = [10**10]*(n+1)
    dp[0] = -10**10
    
    print(n,a,dp)
    for i in range(n):
#        idx = bisect(dp, a[i]-1)
        idx = bisect(dp, a[i])
        dp[idx] = min(a[i], dp[idx])
        print(i,idx,dp)

#        print("i:",i,"a:",a,"dp2:",dp2)            
    return dp

dp=loopa()        

print(bisect(dp, 10**10-1)-1)    



# Fixed code:
from bisect import bisect

icase=1
if icase==1:
    n=int(input())
    a=[0]*n
    for i in range(n):
        a[i]=-int(input())
elif icase==2:
    n=5
    a=[-2,-1,-4,-5,-3]
elif icase==3:
    n=4
    a=[0,0,0,0]

def loopa():

    n=len(a)
    dp = [10**10]*(n+1)
    dp[0] = -10**10
    
    for i in range(n):
#        idx = bisect(dp, a[i]-1)
        idx = bisect(dp, a[i])
        dp[idx] = min(a[i], dp[idx])

#        print("i:",i,"a:",a,"dp2:",dp2)            
    return dp

dp=loopa()        

print(bisect(dp, 10**10-1)-1)
# Buggy code:
import bisect
import sys
input = sys.stdin.readline
N = int(input())
A = []
for n in range(N):
    A.append(int(input()))
A = A[::-1]
INF = int(1e+9 + 10)
lis = [INF]* (N)
for n in range(N):
    i = bisect.bisect(lis, A[n])    
    lis[i] = A[n]
    #print (lis)
print (bisect.bisect_left(lis, INF)) a

# Fixed code:
import bisect
import sys
input = sys.stdin.readline
N = int(input())
A = []
for n in range(N):
    A.append(int(input()))
A = A[::-1]
INF = int(1e+9 + 10)
lis = [INF]* (N+1)
lis[0] = -1
for n in range(N):
    i = bisect.bisect(lis, A[n])    
    lis[i] = A[n]
print (bisect.bisect_left(lis, INF) - 1)