#include<stdio.h>

#define MAX_N 100001
int n,i,Lm,p,L[MAX_N],a[MAX_N];

void dinamica() 
{
	int i,j,max;
	L[n]=1;
	for(i=n-1; i>=1; i--)
	{
		max=0;
		for(j=i+1; j<=n; j++)
			if(L[j]>max && a[i]<a[j])
				max=L[j];
		L[i]=max+1;
		if(Lm<L[i])
			Lm=L[i];
	}
}

void drum()
{
	int t;
	t=0; p=1;
	do
	{
		while(L[p]!=Lm || a[t]>a[p])
			p++;
		printf("%d ",a[p]);
		t=p;
		Lm--;
	}while(Lm);
}

int main()
{
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	
	scanf("%d",&n);
	for(i=1; i<=n; i++)
		scanf("%d",&a[i]);
	dinamica();
	
	printf("%d\n",Lm);
	drum();
	return 0;
}