#include<stdio.h>
using namespace std;
int main()
{
	int x,max,i,j,n,a[100001],l[100001];
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	scanf("%d",&n);
	for(i=1;i<=n;i++)
		scanf("%d",&a[i]);
	l[n]=1; 	max=-int(2e9);
	for(i=n-1;i>=1;i--)
		{
			l[i]=1;
			for(j=n;j>=i+1;j--)
			if((l[i]<l[j]+1)&&(a[j]>a[i])) l[i]=l[j]+1;
			if(max<l[i]) max=l[i];
	    }

	
	printf("%d\n",max);
	x=0;
	for(i=1;i<=n;i++)
		if((x<a[i])&(l[i]==max)){ printf("%d ",a[i]); max--; x=a[i];}
		
			
	return 0;
}