#include <fstream>

using namespace std;

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

int n, a[100], b[100];

void citire()
{
    fin>>n;
    for (int i=0;i <n; i++)
         fin>>a[i];
}

void sir_nou()
{
    int max;
    for (int i=n-1; i>=0; i--)
    {
        max=0;
        for (int j=i; j<n; j++)
              if (a[i]<a[j] && b[j]>max)
                  max=b[j];
        b[i]=max+1;
    }
}

void afisare()
{
    int max=0, imax=0;
    for (int i=0; i<n; i++)
         if (b[i]>max)
         {
             max=b[i];
             imax=i;
         }
    fout<<max<<endl;
    fout<<a[imax]<<" ";
    int max1=max;
    int x=a[imax];
    for (int i=imax; i<n; i++)
         if (b[i]==max1-1 && a[i]>x)
         {
             fout<<a[i]<<" ";
             max1--;
             x=a[i];
         }
}

int main()
{
    citire();
    sir_nou();
    afisare();
    return 0;
}