#include<iostream>
#include<cstdio>
#define mysister
#define maxn 10001
using namespace std;
int n,a[maxn][3],ans=1,s;
int main()
{
	freopen("maxxl.in","r",stdin);
	freopen("maxxl.out","w",stdout);
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
	{
	  scanf("%d",&a[i][0]);
	  a[i][1]=1;
	}
	for(int i=n-1;i>=1;i--)
	{
	  for(int j=i+1;j<=n;j++)
	  if(a[i][0]<=a[j][0])
	  {
	  	if(a[i][1]<a[j][1]+1)
	  	{
	  	  a[i][1]=a[j][1]+1;
	  	  a[i][2]=j;
		}
	  }
	  if(ans<=a[i][1])
	  {
		ans=a[i][1];
		s=i;
	  }
	}
	
	printf("%d\n",ans);
	while(a[s][2])
	{
	  printf("%d ",a[s][0]);
	  s=a[s][2];
	}
	printf("%d",a[s][0]);
	return 0;
}