#include <fstream>
using namespace std;

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

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

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

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

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

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