#include <bits/stdc++.h>
using namespace std;
void in() { return; }
template <typename T, typename... Types>
void in(T &a, Types &...b) {
  cin >> (a);
  in(b...);
}
void o() { return; }
template <typename T, typename... Types>
void o(T a, Types... b) {
  cout << (a);
  cout << ' ';
  o(b...);
}
bool sortin(const pair<long long int, long long int> &e,
            const pair<long long int, long long int> &f) {
  return (e.first < f.first);
}
bool POT(long long int x) { return x && (!(x & (x - 1))); }
long long int i, j, k, l, m, n, p, q, r, a, b, c, x, y, z, ts, mn = 1e18,
                                                               mod = 1e9 + 7;
long long int ar[250005], br[250005], xr[250005], tem[250005];
int main() {
  {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
  };
  in(n, k);
  long long int carry = 0;
  while (n > 0) {
    n = n - k;
    ar[c++] = n;
    if (n < 1) {
      carry = 1 - n;
      break;
    }
    n = n - k - 1;
  }
  o(c);
  cout << endl;
  for (long long int i = c - 1; i >= 0; i--) o(ar[i] + carry);
}
