#include <fstream>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,i,v[100000],max1,l[100000],j;
int main()
{
    f>>n;
    for (i=1; i<=n; i++)
        f>>v[i];
    l[n]=1;
    for (i=n-1; i>=1; i--)
    {
        max1=0;
        for (j=i+1; j<=n; j++)
            if (v[i]<v[j] && l[j]>max1 ) max1=l[j];
        l[i]=1+max1;
    }
    int i1;
    max1=0;
   for (i=1;i<=n;i++)
   if (l[i]>max1) {i1=i;max1=l[i];};
   g<<max1<<'\n';
   g<<v[i1]<<' ';
   for (i=i1;i<=n;i++)
   if (l[i]<l[i1] && v[i]>v[i1]) {g<<v[i]<<' '; l[i1]=l[i];v[i1]=v[i];}




    return 0;
}