#include <iostream>
#include <cmath>
#include <iomanip>
#include <algorithm>
#include <cstring>
#include <fstream>
#include <string>
#include <vector>
#include <bits/stdc++.h>
using namespace std;
int n, i, nmax, j, poz[100002], k, lg[100002], v[100002];
ifstream f("scmax.in");
ofstream g("scmax.out");

int main()
{
    f >> n;
    for(i = 1; i <= n; i++)
        f >> v[i];
    lg[n] = 1;
    poz[n] = -1;
    for(i = n - 1; i >= 1; i--)
    {
        lg[i] = 1;
        poz[i] = -1;
        for(j = i + 1; j <= n; j++)
        {
            if(v[i] < v[j] && lg[i] < lg[j] + 1)
            {
                lg[i] = lg[j] + 1;
                poz[i] = j;
                if(lg[i] > nmax)
                {
                    nmax = lg[i];
                    k = i;
                }
            }
        }
    }
    g << nmax << "\n";
    while(k != -1)
    {
        g << v[k] << " ";
        k = poz[k];
    }
    return 0;
}