#include <fstream>

using namespace std;
ifstream fin ("scmax.in");
ofstream fout ("scmax.out");
int l[100001], poz[100001], n;
long long int v[100001];
int main()
{
    fin>>n;
    for(int i=1; i<=n;i++)
    {
        fin>>v[i];
    }
    l[n]=1; poz[n]=-1; int maxim=0, p=0;
    for(int i=n-1; i>=1; i--)
    {
        poz[i]=-1; l[i]=1;
        for(int j=i+1; j<=n; j++)
        {
            if(v[i]<v[j] && l[i]<l[j]+1)
            {
                l[i]=l[j]+1;
                if(l[i]>maxim)
                {
                    maxim=l[i];
                    p=i;
                }
                poz[i]=j;
            }
        }
    }
    fout<<maxim<<"\n";
    int i=p;
    fout<<v[p]<<" ";
    while(poz[i]!=-1)
    {
        i=poz[i];
         fout<<v[i]<<" ";
    }

    return 0;
}