#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, m, i, j, v[100005], best[100005], lmax, pred[100005], sol[100005];
int main()
{
    fin>>n;
    best[1]=1;
    for(i=1;i<=n;i++)
    {
        fin>>v[i];
        j=i-1;
        while(j>=0)
            {
                if(best[j]+1>best[i]&&v[j]<v[i])
                {
                    pred[i]=j;
                    best[i]=best[j]+1;
                }
                j--;
            }
        lmax=max(best[i],lmax);
    }
    fout<<lmax<<'\n';
    i=n;
    while(best[i]!=lmax&&i>=1)
        i--;
    j=0;
    while(pred[i]!=0)
    {
        j++;
        sol[j]=v[i];
        i=pred[i];
    }
    j++;
    sol[j]=v[i];
    for(i=lmax;i>=1;i--)
        fout<<sol[i]<<' ';
    return 0;
}