# include<stdio.h>
int x, max,max1,poz,poz1,n,i,j,a[100010],l[100010],t[100010];
int main()
{
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	scanf("%d\n",&n);
	for (i=1; i<=n; i++)
		scanf("%d ",&a[i]);
	l[n]=1; t[n]=-1;
	max=0;
	for (i=n-1; i>=1; i--)
	{
		l[i]=1;
		t[i]=-1;
		for (j=i+1; j<=n; ++j)
			if (a[j]>a[i] && l[j]+1>l[i]) 
			{ 
				l[i]=l[j]+1; t[i]=j;
				if (l[i]>max) { max=l[i]; poz1=i; }				
			}
		
	}
	printf("%d\n",max);
	x=poz1;
	while (x!=-1)
	{
		printf("%d ",a[x]);
		x=t[x];
	}
	return 0;
}