Problem: We will call a string x good if it satisfies the following condition:

* Condition: x can be represented as a concatenation of two copies of another string y of length at least 1.



For example, `aa` and `bubobubo` are good; an empty string, `a`, `abcabcabc` and `abba` are not good.

Eagle and Owl created a puzzle on good strings. Find one string s that satisfies the following conditions. It can be proved that such a string always exists under the constraints in this problem.

* 1 ≤ |s| ≤ 200
* Each character of s is one of the 100 characters represented by the integers 1 through 100.
* Among the 2^{|s|} subsequences of s, exactly N are good strings.

Constraints

* 1 ≤ N ≤ 10^{12}

Input

Input is given from Standard Input in the following format:


N


Output

In the first line, print |s|, the length of s. In the second line, print the elements in s in order, with spaces in between. Any string that satisfies the above conditions will be accepted.

Examples

Input

7


Output

4
1 1 1 1


Input

299


Output

23
32 11 11 73 45 8 11 83 83 8 45 32 32 10 100 73 32 83 45 73 32 11 10

Solution (in PYTHON3):

Solution:
from collections import deque

N = int( input() ) + 1 # empty counts

hi = 0
while 1 << hi + 2 <= N:
  hi += 1

ans_A = deque()
ans_B = deque()
ptr = 1
for i in range( hi, -1, -1 ):
  ans_A.append( ptr )
  ans_B.append( ptr )
  ptr += 1
  if N >> i & 1:
    ans_A.append( ptr )
    ans_B.appendleft( ptr )
    ptr += 1

print( len( ans_A ) * 2 )
for i in range( len( ans_A ) ):
  print( ans_A[ i ], end = ' ' )
for i in range( len( ans_B ) ):
  print( ans_B[ i ], end = ' \n'[ i + 1 == len( ans_B ) ] )