#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
const int Nmax=100005;
int n,a[Nmax],DP[Nmax],pos[Nmax],Max,poz,i,j;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)f>>a[i];
    for(i=n;i>0;i--)
    {
        DP[i]=1;
        for(j=i+1;j<=n;j++)
        {
            if(a[i]<a[j]&&DP[i]<DP[j]+1)
            {
                DP[i]=DP[j]+1;
                pos[i]=j;
            }
        }
        if(Max<DP[i])
        {
            Max=DP[i];
            poz=i;
        }
    }
    g<<Max<<'\n';
    for(i=poz;i>0;i=pos[i])g<<a[i]<<' ';
    g<<'\n';
    return 0;
}