#include<stdio.h>
long v[100001],b[100001],max,i,n,j,r,c[100001],u;
int main()
{
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	scanf("%d",&n);
	for (i=1;i<=n;i++)
		scanf("%ld",&v[i]);
	b[1]=1;
	for (i=2;i<=n;i++)
	{
		max=0;
		for (j=i-1;j>=1;j--)
			if (v[i]>v[j])
			{
				if (max<b[j]+1)
					max=b[j]+1;
			}
		b[i]=max;
	}
	max=0;
	for (i=1;i<=n;i++)
		if (max<b[i])
		{
			r=i;
			max=b[i];
		}
	printf("%ld\n",max);
	max--;
	c[++u]=v[r];
	while (max)
	{
		for (i=r;i>=1;i--)
			if (b[i]==max)
			{
				c[++u]=v[i];
				break;
			}
		max--;
	}
	for (i=u;i>=1;i--)
		printf("%ld ",c[i]);
}