#include <bits/stdc++.h>
#define DAU  ios::sync_with_stdio(false); fin.tie(0); fout.tie(0);
#define PLEC fin.close(); fout.close(); return 0;
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
const int Dim = 110011;
int n, x, poz, v[Dim], l[Dim], sir[Dim], a[Dim], last = 2e9 + 2, lmax, k;
inline int caut(int st, int dr, int val)
{
    if (val > v[dr])
        return dr + 1;
    int mij, poz = dr;
    while (st <= dr)
    {
        mij = (st + dr) / 2;
        if (val <= v[mij])
            poz = mij, dr = mij - 1;
        else st = mij + 1;
    }
    return poz;
}
int main()
{
    DAU
    fin >> n >> x;
    v[1] = x;
    l[1] = lmax = 1;
    for (int i = 2; i <= n; ++i)
    {
        fin >> x;
        poz = caut(1, lmax, x);
        l[i] = poz;
        if (poz == lmax + 1)
            v[++lmax] = x;
        else v[poz] = x;
        a[i] = x;
    }
    fout << lmax << '\n';
    k = lmax;
    for (int i = n; i; --i)
        if (l[i] == k && a[i] < last)
            sir[k--] = a[i], last = a[i];
    for (int i = 1; i <= lmax; ++i)
        fout << v[i] << ' ';
    PLEC
}