#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");

int n, i, j, v[100010], d[100010], t[100010], s[100010], st, dr, mid, indice, k;


int main(){
    fin>>n;
    for(i=1; i<=n+1; i++){
        fin>>v[i];
    }
    k=1;
    d[1]=1;
    for(i=2; i<=n; i++){
        ///cautam ultimul nr mai mic decat v[i]
        st=1;
        dr=k;
        while(st<=dr){
            mid=(st+dr)/2;
            indice=d[mid];
            if(v[indice]>=v[i]){
                dr=mid-1;
            }else{
                st=mid+1;
            }
        }
        indice=d[st];
        if(st>k){
            k++;
            d[k]=i;
            t[i]=d[st-1];
        }else{
            d[st]=i;
            t[i]=d[st-1];
        }
    }
    fout<<k<<"\n";
    n=d[k];
    k=0;
    while(n!=0){
        s[++k]=v[n];
        n=t[n];
    }
    for(i=k; i>0; i--){
        fout<<s[i]<<" ";
    }
}