#include <fstream>
using namespace std;
int v[100005],n,m,p,u[100005],l[100005],maxx;
int main()
{
    int i,j,k=0;
    ifstream fin ("scmax.in");
    ofstream fout ("scmax.out");
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>v[i];
    fin.close();
    l[n]=1;
    u[n]=n;
    for (i=n-1;i>=1;i--)
    {
        for (j=i+1;j<=n;j++)
            if (v[i]<v[j]&&l[i]<l[j])
        {
            l[i]=l[j]+1;
            u[i]=j;
        }
    }
    maxx=l[1];p=1;
    for (i=2;i<=n;i++)
        if (l[i]>maxx)
    {
        maxx=l[i];
        p=i;
    }
    fout<<l[p]<<'\n';
    for (i=p,j=1;j<=maxx;j++)
    {
        fout<<v[i]<<" ";
        i=u[i];
    }
    fout.close();
    return 0;
}