#include <iostream>
#include <fstream>

using namespace std;

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

int x[100001],z[100001],n,i,smax,j,start[100001];

int main()
{
    f >> n;
    for (i=1;i<=n;i++)
        f >> x[i];
    z[n]=1;start[n]=1;
    for (i=n-1;i>=1;i--)
    {
        for (j=1;j<=n;j++)
            if (x[i]<x[j] && z[i]<z[j]) {z[i]=z[j]+1;start[i]=j;}
        if (z[i]>z[smax]) smax=i;
    }
    g << z[smax] << "\n";
    while (start[smax])
    {
        g << x[smax] << ' ';
        smax=start[smax];
    }

    return 0;
}