#include <fstream>
#define DIM 100010
using namespace std;
int v[DIM], t[DIM];
int d[DIM];
int n, i, j, maxim, sol, p, u, k;
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;
}