#include<fstream>
using namespace std;
int a[100000],b[100000],c[100000][2],n,d[100000],l,p;
int main()
{
	int i,j,m;
	freopen("scmax.in","r",stdin);
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&a[i]);
		b[i]=1;
		c[i][0]=c[i][1]=i;
		m=0;
		for(j=i-1;j>=0;j--)
			if(a[j]<a[i])
				if(m<b[j]+1)
				{
					m=b[i]=b[j]+1;
					p=i;
					c[i][0]=c[j][0];
				}
	}
	freopen("scmax.out","w",stdout);
	printf("%d\n",m);
	d[l++]=a[p];
	while(m>1)
	{
		int sw=0;
		i=p-1;
		while(!sw)
		{
			if(a[i]<a[p] && b[i]==m-1)
				sw=1;
			else
				i--;
		}
		d[l++]=a[i];
		m--;
		p=i;
	}
	for(i=l-1;i>=0;i--)
		printf("%d ",d[i]);
	printf("\n");
	return 0;
}