#include<stdio.h>
void af(int);
int caut (int);
const int nmax=100010;
int n,v[nmax],p[nmax],b[nmax],l[nmax],k,nr,max;
int main()
{
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	int i,poz;
	nr=1;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
		scanf("%d",&v[i]);
	b[1]=l[1]=1;
	l[0]=0;
	for(i=2;i<=n;i++)
	{
		poz=caut(v[i]);
		p[i]=l[poz];
		b[i]=poz+1;
		l[poz+1]=i;
		if(nr<poz+1)
			nr=poz+1;
	}
	max=0;
	poz=0;
	for(i=1;i<=n;i++)
		if(max<b[i])
		{
			max=b[i];
			poz=i;
		}
	printf("%d\n",max);
	af(poz);
	return 0;
}
int caut(int x)
{
	int p=0,u=nr,m=(p+u)/2;
	while(p<=u)
	{
		if(v[l[m]]<x&&v[l[m+1]]>=x)return m;
		else if(v[l[m+1]]<x)
		{
			p=m+1;
			m=(p+u)/2;
		}
		else
		{
			u=m-1;
			m=(p+u)/2;
		}
	}
	return nr;
}
void af(int i)
{	
	if(p[i]>0)af(p[i]);
	printf("%d ",v[i]);
}