#include<fstream>
using namespace std;
ifstream f ("scmax.in");
ofstream g ("scmax.out");
int n, v[100001] , sol[100001] , ns ,w , p;
int main ()
{
    f >> n;
    for (int i = 1; i <= n; ++i)
        f >> v[i];
    sol[n] = 1; ns = 1; p = n;
    for (int i = n -1; i >= 1; --i)
    {
        int w = 0;
        for (int j = i + 1; j <= n; ++j)
            if (sol[j] > w && v[j] > v[i])
                w = sol[j];
        sol[i] = w + 1; if (ns < w + 1) {ns = w; p = i;}
        g << ns << '\n';
        for (int i = p; i <= n; ++i)
        {
            if (sol[i] == ns)
                g << v[i] << ' ';
        }
    }
    g.close ();
    return 0;
}