#include <fstream>
using namespace std;
#define maxn 100003
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,i,j,v[maxn],best[maxn],poz[maxn];
int maxim=0,p;
int main()
{
    cin>>n;
    for(i=1; i<=n; i++)
        cin>>v[i];

    best[n]=1;
    poz[n]=-1;
    maxim=1; p=n;
    for(i=n-1; i>=1; i--)
    {
        best[i]=1;
        poz[i]=1;
        for(j=i+1; j<=n; j++)
        {
            if(v[i]<v[j] && best[i] < best[j] +1)
            {
                best[i]=best[j]+1;
                poz[i]=j;
                if(best[i]>maxim)
                    maxim=best[i], p=i;
            }
        }
    }
    cout<<maxim<<"\n";
    for(i=p; i!=-1; i=poz[i])
        cout<<v[i]<<" ";

}