#include <fstream>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
long long n,i,v[100000],max1,l[100000],j,lmax,vmax;
int main()
{
    f>>n;
    for (i=1; i<=n; i++)
        f>>v[i];
    l[n]=1;
    for (i=n-1; i>=1; i--)
    {
        max1=0;
        for (j=i+1; j<=n; j++)
            if (v[i]<v[j] && l[j]>max1 ) max1=l[j];
        l[i]=1+max1;
    }
    int i1;
    max1=0;
    for (i=1; i<=n; i++)
        if (l[i]>max1)
        {
            i1=i;
            max1=l[i];
        };
    g<<max1<<'\n';
    g<<v[i1]<<' ';
    lmax=l[i1];
    vmax=v[i1];
    for (i=i1; i<=n; i++)

        if (l[i]==lmax-1 && v[i]>vmax)
        {
            g<<v[i]<<' ';
            lmax--;
            vmax=v[i];
        }
    return 0;
}