#include <fstream>
#define inf 2000000000
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,v[100010],i,cnt,st,dr,mid,d[100010],t[100010];
void afisare(int poz) {
    if (poz!=0) {
        afisare(t[poz]);
        fout<<v[poz]<<" ";
    }
}
int main() {
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>v[i];
    /**d[i]=cea mai mica valoare in care se termina un subsir crescator
            de lungime i cu elementele parcurse pana acum
    **/
    v[n+1]=inf;
    cnt=1;
    d[1]=1;
    for (i=2;i<=n;i++) {
        st=1; dr=cnt;
        while (st<=dr) {
            mid=(st+dr)/2;
            if (v[d[mid]]>=v[i])
                dr=mid-1;
            else
                st=mid+1;
        }
        if (st>cnt) {
            d[++cnt]=i;
            t[i]=d[st-1];
        }
        else {
            if (v[d[st]]>v[i]) {
                d[st]=i;
                t[i]=d[st-1];
            }
        }
    }
    fout<<cnt<<"\n";
    afisare(d[cnt]);
    return 0;
}