#include <iostream>
#include <fstream>
#include <cstring>
#include <string>
#include <climits>
#include <algorithm>
#include <cmath>
using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");
#define baza 1
#define MAX 100005

long long int  n,b,nr,i,j;
long long int x,m,maxx;

int a[MAX];
int s[MAX];
int c[MAX];


int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>a[i];
    }
    s[n]=1;
    for(i=n;i>=1;i--)
    {
        x=1;
        for(j=i+1;j<=n;j++)
        {
            if(a[i]<a[j] && s[j]>=x)
            {
                x=s[j]+1;
            }
        }
        s[i]=x;

        if(x>=maxx)
        {
            c[x]=i;
            maxx=x;
        }
    }
    fout<<maxx<<"\n";
    for(i=maxx;i>=1;i--)
    {
        fout<<a[c[i]]<<" ";
    }





    return 0;
}