#include<stdio.h>
FILE *f=fopen("scmax.in","r");
FILE *g=fopen("scmax.out","w");
int i,n,v[100001],l[100001],poz[100001],p,max,j,k=0,fin[100001],k1=0;
int main()
{
	
	fscanf(f,"%d",&n);
	for(i=1;i<=n;i++)fscanf(f,"%d",&v[i]);
	poz[n]=0;
	for(i=n-1;i>=1;i--)
	{
		max=0;
		p=0;
		for(j=i+1;j<=n;j++)
		{
			if(v[i]<v[j]&&l[j]>max){max=l[j];p=j;}
		}
		l[i]=max+1;
		poz[i]=p;
		
	}
	max=0;
	for(i=1;i<=n;i++)
	{
		if(l[i]>max){max=l[i];p=i;}
	}
	
	while(p>0)
	{
		fin[++k1]=v[p];
		k++;
		p=poz[p];
	}
	fprintf(g,"%d\n",k);
	for(i=1;i<=k1;i++)fprintf(g,"%d ",fin[i]);
}