#include <cstdio>
#include <cstdlib>
#include <vector>
using namespace std;

vector<int> s[100000];

int main()
{
	freopen("scmax.in", "r", stdin);
	freopen("scmax.out", "w", stdout);
	int n, i, j, *v, *next, *cnt, k=0, start;
	scanf("%d", &n);
	v=(int*)malloc(4*n); next=(int*)malloc(4*n); cnt=(int*)malloc(4*n);
	for (i=0; i<n; ++i) cnt[i] = 1;
	for (i=0; i<n; ++i)
		scanf("%d", v+i);
	
	for (i=n-2; i>=0; --i)
		for (j=i+1; j<n; ++j)
			if (v[j] > v[i])
				s[i].push_back(j);
	
	for (i=n-1; i>=0; --i)
    {
        int size=s[i].size(), maxim=0, poz=i;
        for (j=0; j<size; ++j)
            if (maxim < cnt[s[i][j]])
            {
                maxim = cnt[s[i][j]];
                poz = s[i][j];
            }
        s[i].clear();
        cnt[i] += maxim;
        if (cnt[i] > k)
        {
            k = cnt[i];
            start = i;
        }
        next[i] = poz;
    }
	
	printf("%d\n", k);
	for (i=0; i<k; ++i)
	{
		printf("%d ", v[start]);
		start = next[start];
	}
	
	return 0;
}