#include <fstream>
#include <vector>

std::ifstream f("scmax.in");
std::ofstream g("scmax.out");

unsigned int n;
unsigned int v[100001];
std::vector<unsigned int> length(100001, 1);
unsigned int pos[100001];
unsigned int maxLength;
unsigned int maxLengthIndex;

void Read()
{
	f >> n;
	
	for (int i = 1; i <= n; ++i)
	{
		f >> v[i];
	}
}

void modify(unsigned int i)
{
	unsigned int j = i + 1;
	unsigned int max = 0;
	unsigned int maxIndex = 0;

	for (; j <= n; ++j)
	{
		if (v[j] > v[i] && length[j] > max)
		{
			max = length[j];
			maxIndex = j;
		}
	}

	length[i] = 1 + max;

	if (length[i] > maxLength)
	{
		maxLength = length[i];
		maxLengthIndex = i;
	}

	pos[i] = maxIndex;
}

void Solve()
{
	unsigned int i;

	for (int i = n - 1; i > 0; --i)
	{
		modify(i);
	}

	g << maxLength << "\n";

	for (i = maxLengthIndex; pos[i] != 0; i = pos[i])
	{
		g << v[i] << " ";
	}

	g << v[i];

	g << "\n";
}

int main()
{
	Read();
	Solve();

	return 0;
}