#include <fstream>
using namespace std;

ifstream f ("scmax.in");
ofstream g ("scmax.out");

int v[100001], L[100001], poz[100001];

int main ()
{
    int i, j, l, lmax = -1, max, n, p, prim;
    f>>n;
    for (i=0; i<n; i++) f>>v[i];
    L[n-1] = 1;
    for (i=n-2; i>=0; i--)
    {
        poz[i] = 0;
        max = 0;
        for (j=i+1; j<n; j++)
            if(v[i]<v[j] && L[j]>max)
            {
                max = L[j];
                poz[i] = j;
                prim = i;
            }

        L[i] = max + 1;

        if (L[i]>lmax) lmax = L[i];
    }

    g<<lmax<<'\n';

    for (i=prim; i>0; i=poz[i])
        g<<v[i]<<' ';

    f.close(); g.close(); return 0;
}