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

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

int v[1001],lung[1001],sol[1001];

int main()
{
    int n,lmax,maxi=1,cmax = 1;
    in>>n;
    for(int i=1;i<=n;i++)
        in>>v[i];
    lung[1]=1;
    for(int i=2;i<=n;i++){
        lmax=0;
        for(int j=1;j<i;j++)
            if(v[i]>v[j]){
                lmax = max(lmax, lung[j]);
            }
        lung[i] = 1 + lmax;
        cmax = max(cmax, lung[i]);
    }
    out<<cmax<<"\n";
    maxi = cmax;
    for(int i=n;i>=1;i--)
        if(lung[i]==maxi){
              sol[maxi]=i;
              maxi--;
            }
    for(int i=1;i<=cmax;i++)
        out<<v[sol[i]]<<" ";
    return 0;
}