#include <fstream>
using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int const MaxN=100001;
int a[MaxN],L[MaxN],t[MaxN];
int n,lmax,k;

void Read();
void Solve();
void Write(int i);
int main()
{
    Read();
    Solve();
    fout<<lmax<<'\n';
    Write(k);

	return 0;
}
void Read()
{
    fin>> n;
    for(int i=1; i <= n; ++i)
        fin >> a[i];
}
void Solve()
{
    for (int i = 1;i <= n; ++i)
    {
        L[i]=1;
        for(int j=1;j<i;j++)
            if(a[j]<a[i]&&L[i]<L[j]+1)
                {
                    L[i]=L[j]+1;
                    t[i]=j;
                }
                if(lmax<L[i])
        {
            lmax=L[i];
            k=i;
        }
    }


}
void Write(int i)
{
    if(i==0) return;
    Write(t[i]);
    fout<<a[i]<<" ";
}