#include <fstream>
#include <iostream>
using namespace std;

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

int n, v[100005], pre[100005], lungime[100005], lgmax;

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

void solve() {
    lgmax = 1, lungime[1] = 1;
    for(int i = 2; i <= n; i++) {
        int st = 1, dr = lgmax, found = 0;
        while(st <= dr) {
            int m = (st+dr)/2;
            if(v[lungime[m]] < v[i] && (v[lungime[m+1]] >= v[i] || m+1 > lgmax)) {
                found = m;
                break;
            }
            else if(v[lungime[m]] < v[i])
                st = m+1;
            else
                dr = m-1;
        }
        pre[i] = lungime[found];
        if(lgmax < found+1) lgmax = found+1;
        if(lungime[found+1] == 0 || v[lungime[found+1]] > v[i])
            lungime[found+1] = i;
    }
    fout << lgmax << '\n';
}

void afis(int pos) {
    if(v[pos]) {
        afis(pre[pos]);
        fout << v[pos] << ' ';
    }
}

int main() {
    citire();
    solve();
    afis(lungime[lgmax]);
}