#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int v[100001],t[100001],l[100001],w[100001],n,poz=1,i,nr,j,x,maxim,p,M,P,u,mid;
void drum(int poz){
    if(t[poz]!=0){
        drum(t[poz]);
        }
        fout<<v[poz]<<" ";
}
int main(){
    fin>>n;
    for(i=1;i<=n;i++){
        fin>>v[i];
    }
    w[1]=1;nr=1;
    for(i=2;i<=n;i++){
        if(v[i]>v[w[nr]]){
            nr++;
            w[nr]=i;
            t[i]=w[nr-1];
        }
        else{
            p=1;u=nr;
            while(p<=u){
                mid=(p+u)/2;
                if(v[i]>v[w[mid]]){
                    p=mid+1;
                }
                else{
                    u=mid-1;
                }
            }
            if(v[i]>v[w[p-1]]){
                w[p]=i;
                t[i]=w[p-1];
            }
        }
    }
    fout<<nr<<"\n";
    drum(w[nr]);



    return 0;
}