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

const int N = 100001;
long long n, v[N];

void citire() {
    in >> n;
    int i;
    for (i=1; i<=n; i++)
        in >> v[i];
}

long long aux[N], k, lung[N], lungMax;

int cautareBinara(long long element, int st, int dr) {
    if (st > dr)
        return 0;
    else {
        int m = (st + dr)/2;
        if (element<=aux[m] && element > aux[m+1])
            return m;
        if (element > aux[m])
            return cautareBinara(element,m+1,dr);
        else
            return cautareBinara(element,st,m-1);
    }
}

void subsirCrescatorMax() {
    aux[1] = v[1];
    lung[1] = 1;
    k = 1;
    int i;
    for (i=2; i<=n; i++) {
        int pozitie = cautareBinara(v[i],1,k);
        if (pozitie) {
            aux[pozitie] = v[i];
            lung[i] = pozitie;
            if (lungMax < lung[i])
                lungMax = lung[i];
        }
        else {
            aux[++k] = v[i];
            lung[i] = k;
            if (lungMax < lung[i])
                lungMax = lung[i];
        }
    }
}

void afisare() {
    out << lungMax <<"\n";
    int i;
    for (i=1; i<=k; i++)
        out <<aux[i] <<" ";
}

int main()
{
    citire();
    subsirCrescatorMax();
    afisare();
    return 0;
}