#include <stdio.h>
#define N 1<<17
int n,v[N],val[N],r;
int cbin(int x)
{
	int i,step;
	for (step=1; step<=r; step<<=1);
	for (i=0; step; step>>=1)
		if (i+step<=r && val[i+step]<x)
			i+=step;
	return ++i;
}
int main()
{
	freopen("scmax.in","r",stdin);
	freopen("scmax.out","w",stdout);
	scanf("%d",&n);
	int i,poz;
	scanf("%d",&v[1]);
	val[++r]=v[1];
	for (i=2; i<=n; i++)
	{
		scanf("%d",&v[i]);
		if (v[i]>val[r])
			val[++r]=v[i];
		else
		{
			poz=cbin(v[i]);
			val[poz]=v[i];
		}
	}
	printf("%d\n",r);
	for (i=1; i<=r; i++)
		printf("%d ",val[i]);
	return 0;
}