#include<iostream>
#include<cstdio>
int a[100001],poz[100001],L[100001],max,n,i,j,p;
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]);
	max=1;L[n]=1;p=n;poz[n]=-1;
	for(i=n-1;i>=1;--i)
	{
		L[i]=1;poz[i]=-1;
		for(j=i+1;j<=n;++j)
			if(a[i]<a[j]&&L[i]<L[j]+1)
			{
				L[i]=L[j]+1;
				poz[i]=j;
				if(L[i]>max) max=L[i],p=i;
			}
	}
	printf("%d\n",max);
	while(p!=-1)
	{
		printf("%d ",a[p]);
		p=poz[p];
	}
	return 0;
}