#include<fstream>
using namespace std;
int a[100000],b[100000],c[100000][2],n,d[100000];
int main()
{
	int i,j,m=0,p,l=0;
	freopen("scmax.in","r",stdin);
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&a[i]);
		b[i]=1;
		c[i][0]=c[i][1]=i;
		//d[l]=i;
		//m=0;
		int sw=1;
		for(j=i-1;j>=0;j--)
			if(a[j]<a[i])
				if(m<=b[j]+1)
				{
					if(m==b[j]+1 && a[i]>=b[j])
						l--;
					d[l++]=j;
					p=i;
					m=b[i]=b[j]+1;
					c[i][0]=c[j][0];
					break;
				}
	}
	freopen("scmax.out","w",stdout);
	printf("%d\n",m);
	for(i=0;i<l;i++)
		printf("%d ",a[d[i]]);
	printf("%d\n",a[c[p][1]]);
	return 0;
}