#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
const int lim=1e5+3;
int bst[lim],last[lim];
int main()
{
    int n,a,ans=0;
    cin>>n;
    for(int i=1;i<=n;++i)
    {
        cin>>a;
        int l=0,r=ans,med;
        while(l<r)
        {
            if(r==l+1)
                med=r;
            else med=(l+r)/2;
            if(bst[med]<a)
                l=med;
            else r=med-1;
        }
        bst[l+1]=a;
        last[l+1]=bst[l];
        ans=max(ans,l+1);
    }
    cout<<ans<<endl;
    for(int i=2;i<=ans;++i)
        cout<<last[i]<<' ';
    cout<<bst[ans];
    return 0;
}