#include <fstream>

using namespace std;

ifstream fin ("scmax.in");
ofstream fout ("scmax.out");

int n, scmax;

int x[100010], v[100010], t[100010];

int cautbin (int nr) {

    int st = 1, dr = scmax;

    while (st <= dr) {

        int mid = (st + dr) / 2;

        if (v[x[mid]] >= nr)
            dr = mid - 1;
        else
            st = mid + 1;
    }

    return st;

}

void scrie (int nr) {

    if (nr == 0)
        return;
    scrie (t[nr]);
    fout << v[nr] << " ";
}

int main () {

    fin >> n;

    for(int i = 1; i <= n; i++)
        fin >> v[i];

    x[++scmax] = 1;

    for (int i = 2; i <= n; i++) {

        int poz = cautbin(v[i]);

        if (poz > scmax)
            scmax++;

        x[poz] = i;

        t[i] = x[poz - 1];
    }

    fout << scmax << "\n";

    scrie(x[scmax]);

    return 0;
}