#include <bits/stdc++.h>

#define DIM 100010

using namespace std;

int v[DIM], t[DIM];
int d[DIM];
int n, i, j, maxim, sol, p, u;

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

void drum(int u) {
	if (u != 0) {

		drum(t[u]);
		fout << v[u] << " ";
	}
}

int main () {
	fin >> n;
	
	for (i = 1; i <= n; i++)
		fin >> v[i];
	
	d[1] = 1;
	
	for (i = 2; i <= n; i++) {
		maxim = 0;
		for (j = 1; j < i; j++)

			if (v[j] < v[i] && d[j] > maxim) {
				maxim = d[j];
				p = j;
			}

		d[i] = maxim + 1;

		if (d[i] != 1) t[i] = p;
		else t[i] = 0;

		if (d[i] > sol) {
			sol = d[i];
			u = i;
		}
	}

	fout << sol << "\n";

	drum(u);

	return 0;
}