#include <iostream>
#include <vector>
using namespace std;

int N;
vector <int> v;

int main()
{
    for (int i = 1; i <= 9; ++i)
    {
        v.push_back(i);
    }

    int pow = 10;

    for (int j = 1; j <= 6; ++j)
    {
        for (int i = 1; i <= 10; ++i)
        {
            v.push_back(pow);
        }
        pow *= 10;
    }

    cout << v.size() << '\n';
    for (int i = 0; i < v.size(); ++i)
    {
        cout << v[i] << " ";
    }
}