#include<cstdio>
#include<vector>

using namespace std;

int n;
vector <long long int>L[100001];

int main()
{
	int i, j, maxim, poz;
	
	freopen("scmax.in", "r", stdin);
	freopen("scmax.out", "w", stdout);
	
	scanf("%d", &n);
	for(i = 1; i <= n; i++)
	{
		long long int x;
		scanf("%lld", &x);
		
		L[i].push_back(x);
		for(j = 1; j <= i; j++)
		{
			int s = L[j].size() - 1;
			if(L[j][s] < x) 
				L[j].push_back(x);
		}
	}
	
	maxim = L[1].size();
	poz = 1;
	for(i = 2; i <= n; i++)
		if(maxim < L[i].size())
		{
			maxim = L[i].size();
			poz = i;
		}
		
	printf("%d\n", maxim);
	for(i = 0; i < L[poz].size(); i++)
		printf("%lld ", L[poz][i]);
	
	return 0;
}