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
#include <bits/stdc++.h>

using namespace std;

int n;
vector<int> res;
vector<int> v;

int main() {
  scanf("%d", &n);
  int bitCnt = 0;
  int k = 1;
  while (bitCnt < n) {
    bitCnt += __builtin_popcount(k);
    v.push_back(k);
    ++k;
  }

  for (int i = v.size() - 1; i >= 0; --i) {
    if (bitCnt - __builtin_popcount(v[i]) >= n) {
      bitCnt -= __builtin_popcount(v[i]);
      continue;
    } else {
      res.push_back(v[i]);
    }
  }

  printf("%d\n", res.size());
  for (auto x : res) {
    printf("%d ", x);
  }
}