#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,a[100003],L[100003],T[100003];
void cauta()
{int l,dr,lmax=0,stmax=0,i,j,rez;
for(i=n;i>=1;i--)
{
    l=0;
    dr=i;
    for(j=i+1;j<=n;j++)
    {
        if(a[i]<a[j]&&l<L[j])
        {
            l=L[j];
            dr=j;
        }
    }
    T[i]=dr;
        L[i]=l+1;
        if(L[i]>lmax)
        {
            lmax=L[i];
            stmax=i;
        }
    }
    cout<<lmax<<'\n';
    rez=stmax;
    for(;rez!=T[rez];rez=T[rez])
        cout<<a[rez]<<" ";
    cout<<a[rez];


}

int main()
{int i;
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>a[i];
 cauta();
    return 0;
}