1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
#include <iostream>

using namespace std;

int bit_power(int x) {
  int bits = 0;

  while (x > 0) {
    if (x % 2 == 1) {
      bits++;
    }

    x /= 2;
  }

  return bits;
}

int main() {

  int n;
  cin >> n;

  int bits = 0;
  int x = 1;
  while (bits + bit_power(x) <= n) {
    bits += bit_power(x);
    x++;
  }
  bits += bit_power(x);

  int result[1000007];
  int k = 0;
  while (x >= 1) {
    if (bits - bit_power(x) >= n) {
      bits -= bit_power(x);
    } else {
      result[k] = x;
      k++;
    }

    x--;
  }

  cout << k << endl;
  for (int i = 0; i < k; i++) {
    cout << result[i] << " ";
  }

  cout << endl;

  return 0;
}