#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int a[100001];
int Nr[100001];
int lgmax,n,i,j;
int main()
{
    f>>n;
    for(i=1;i<=n;++i) f>>a[i];
    Nr[n]=1;
    for(i=n-1;i>=1;--i)
    {
        Nr[i]=1;
        for(j=i+1;j<=n;++j)
        {
            if(a[j]>a[i]&&Nr[j]+1>Nr[i])
            {
                Nr[i]=Nr[j]+1;
                if(Nr[i]>lgmax) lgmax=Nr[i];
            }
        }
    }
    g<<lgmax<<'\n';
    for(i=1;i<=n&&lgmax>0;++i)
    {
        if(Nr[i]==lgmax)
        {
            g<<a[i]<<" ";
            --lgmax;
        }
    }
    return 0;
}