#include <iostream>
#include <fstream>
using namespace std;

int v[100001],pred[100001],lung[100001];
ifstream in("scmax.in");
ofstream out("scmax.out");

void subsir (int p)
{
    if(pred[p]!=0)
        subsir(pred[p]);
    out<<v[p]<<" ";
}
int main()
{
    int i,j,n,lmax,pr,max=0,p;
    in>>n;
    for(i=1; i<=n; i++)
        in>>v[i];
    lung[1] = 1;
    pred[1] = 0;
    for(i=2; i<=n; i++){
        lmax = 0;
        pr = 0;
        for(j=1; j<i; j++){
            if(v[j] < v[i])
                if(lung[j] > lmax){
                    lmax = lung[j];
                    pr = j;
                }
            lung[i] = 1+lmax;
            pred[i] = pr;
        }
    }
    for(i=1; i<=n; i++)
        if(lung[i] > max){
            max = lung[i];
            p = i;
            }
    out<<max<<'\n';
    subsir(p);
    return 0;
}