#include <bits/stdc++.h>

using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int64_t N, S;
    cin >> N >> S;
    vector<int64_t> V;
    for (int64_t i = N; i >= 1; --i)
    {
        int64_t t = min(S, i);
        if (t)
        {
            V.push_back(t);
            S -= t;
        }
    }
    ranges::reverse(V);
    cout << V.size() << '\n';
    for (auto v : V)
        cout << v << ' ';
    cout << '\n';
}