#include <iostream>
#include <fstream>

using namespace std;

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

long long v[100000],l[100000],r[100000];
int n,i,j;

int main()
{
    long long max,p;
    fin>>n;
    for (i=1;i<=n;++i)
        fin>>v[i];
    l[n]=1; r[n]=0;
    for (i=n-1;i>=1;--i)
        {
            max=0; p=0;
            for (j=i+1;j<=n;j++)
                if (v[i]<v[j]&&l[j]>max)
                    {
                        max=l[j];
                        p=j;
                    }
            l[i]=max+1;
            r[i]=p;
        }
    max=l[1]; p=1;
    for (i=2;i<=n;++i)
        if (l[i]>max)
            {
                max=l[i];
                p=i;
            }
    fout<<max<<'\n';
    while (p>0)
        {
            fout<<v[p]<<" ";
            p=r[p];
        }
    return 0;
}