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#include <iostream>
#include <set>
#define ASZ(array_) ((int)(sizeof(array_) / sizeof((array_)[0])))
#define GETV(value_) (std::cin >> (value_))
#define FORIR(container_, vname_) for (auto vname_ = (container_).rbegin(); vname_ != (container_).rend(); ++vname_)
#define DECL_GETT(type_, name_) \
  type_ name_;                  \
  GETV(name_)
#define DECL_GET(name_) DECL_GETT(int, name_)
#define PUTN(value_) std::cout << (value_)
#define PUT(value_) PUTN(value_) << "\n"
namespace alg {
namespace bit {
template <typename T>
int count(T t) {
  int r = 0;
  while (t) {
    r += (t & 1);
    t >>= 1;
  }
  return r;
}
}
}
int main(void) {
  DECL_GET(n);
  std::set<int> sets[20];
  std::set<int> result;
  int v = 0;
  while (n > 0) {
    int bits_count = alg::bit::count(++v);
    n -= bits_count;
    while (bits_count <= ASZ(sets)) {
      sets[bits_count++ - 1].insert(v);
    }
    result.insert(v);
  }
  n = -n;
  while (n > 0) {
    int i = n;
    v = *sets[--i].rbegin();
    result.erase(v);
    n -= alg::bit::count(v);
    do {
      v = sets[i].erase(v);
    } while (i--);
  }
  PUT(result.size());
  char const *delim = "";
  FORIR(result, e) {
    PUTN(delim) << *e;
    delim = " ";
  }
  PUT("");
}