//#include <iostream>
#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int sml[100005];
int n, x;
int lng;
int main()
{
    cin>>n;
    for (int i=1; i<=n; i++)
    {
        cin>>x;
        int st=1; int dr=lng;
        int crnt=lng+1;
        while (st<=dr){
            int mijl=(st+dr)/2;
            if (sml[mijl]>=x)
            {
                crnt=mijl;
                dr=mijl-1;
            }
            else st=mijl+1;
        }
        sml[crnt]=x;
        if (crnt==lng+1) lng++;
    }
    cout<<lng<<'\n';
    for (int i=1; i<=lng; i++) cout<<sml[i]<<' ';
    return 0;
}