c.cpp

#include <bits/stdc++.h>

using namespace std;

typedef int64_t Int;

int main() {
    ios_base::sync_with_stdio(false);

    //freopen("input.txt", "rt", stdin);

    Int need, diff; cin >> need >> diff;

    if (need <= 10000) {
        cout << need << endl;
        for (int i = 0; i < need; ++i) {
            cout << 1 + diff * i << " ";
        }
        return 0;
    }

    vector<Int> a;

    Int curr = 1;

    while (need > 0) {

        Int pow = 1;
        while ((Int(1) << (pow+1)) - 1 <= need) {
            ++pow;
        }

        need -= ((Int(1) << pow) - 1);

        for (Int i = 0; i < pow; ++i) {
            a.push_back(curr);
        }

        assert(curr < (Int)1e18L);

        curr += diff;
    }

    assert(a.size() <= (Int)1e4);

    cout << a.size() << endl;

    for (auto it : a) cout << it << " ";


    return 0;
}