#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, v[100002], sol[100002], ant[100002];

void afisare(int index) {
    if (index == 0)
        return;
    afisare(ant[index]);
    fout << v[index] << ' ';
}

int main() {
    fin >> n;
    for (int i = 1; i <= n; i++)
        fin >> v[i];

    sol[1] = 1;
    for (int i = 2; i <= n; i++) {
        int best = 0;
        for (int j = 1; j < i; j++)
            if (v[j] < v[i] && sol[j] > best) {
                best = sol[j];
                ant[i] = j;
            }
        sol[i] = best + 1;
    }

    fout << sol[n] << '\n';
    afisare(n);
    return 0;
}