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