#include <fstream>

using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int v[5000],l[5000],i,n,j,maxl,c,a[5000];
int main()
{
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>v[i];
    for(i=1;i<=n;i++)
    for(j=0;j<i;j++)
    if(l[j]+1>l[i]&&v[j]<v[i])
        l[i]=l[j]+1;
    maxl=0;
    j=0;
    for(i=1;i<=n;i++)
    if(l[i]>maxl)
    {
        maxl=l[i];
        j=i;
    }
    a[1]=v[j];
    c=1;
    for(i=j;i>0;i--)
    if(l[i]==l[j]-1&&v[i]<v[j])
    {
        a[++c]=v[i];
        l[j]=l[i];
        v[j]=v[i];
    }
    cout<<c<<'\n';
    for(i=c;i>0;i--)
        cout<<a[i]<<" ";
    return 0;
}