#include <cstdio>
using namespace std;
int im,lg[100001],urm[100001],i,j,n,v[100001];
int main()
{
	int max;
	FILE* f=fopen("scmax.in","r");
	FILE* g=fopen("scmax.out","w");
	fscanf(f,"%d",&n);
	for (i=1;i<=n;i++)
		fscanf(f,"%d",&v[i]);
	lg[n]=1;
	urm[n]=0;
	for (i=n-1;i>=1;i--)
	{
		max=0;
		im=0;
		for (j=i+1;j<=n;j++)
			if(v[i]<v[j] && max<lg[j])
			{
				max=lg[j];
				im=j;
			}
		lg[i]=max+1;
		urm[i]=im;
	}
	max=lg[1];
	im=1;
	for (i=2;i<=n;i++)
		if(max<lg[i])
		{
			max=lg[i];
			im=i;
		}
	fprintf(g,"%d\n",max);
	do
	{
		fprintf(g,"%d ",v[im]);
		im=urm[im];
	}
	while (im!=0);
	fclose(g);
	return 0;
}