#include <fstream>
using namespace std;
FILE*fin;
ofstream fout("scmax.out");
int n,i,v[100003],pred[100003],best[100003],j,maxim,nrmax;
void afis(int k)
{
    int x;
    if(pred[k]!=-1)
        {
            x=pred[k];
            afis(x);
            fout<<v[x]<<" ";
        }

}
int main()
{
    fin=fopen("scmax.in","r");
    fscanf(fin,"%d",&n);
    for(i=1;i<=n;i++)
        fscanf(fin,"%d",&v[i]);
    for(i=1;i<=n;i++)
    {
        best[i]=1;
        pred[i]=-1;
        for(j=1;j<i;j++)
            if(v[j]<v[i]&&best[j]>=best[i])
            {
                pred[i]=j;
                best[i]=best[j]+1;
                if(best[i]>maxim)
                {
                    maxim=best[i];
                    nrmax=i;
                }
            }
    }
    fout<<maxim<<'\n';
    afis(nrmax);
    fout<<v[nrmax]<<" ";
    return 0;
}