#include <bits/stdc++.h>

using namespace std;
ifstream fin ("scmax.in");
ofstream fout("scmax.out");
const int nmax = 100000 + 50;
int n, v[nmax], dp[nmax], smax, poz, ans[nmax];
vector <int> sir;
int main()
{
    fin >> n;
    for (int i = 1; i <= n; ++i) {
        fin >> v[i];
    }

    for (int i = 1; i <= n; ++i) {
        int pos;
        if (sir.size() == 0 || v[i] > sir.back()) {
            sir.push_back(v[i]);
            pos = sir.size() - 1;
        }
        else {
            pos = lower_bound(sir.begin(), sir.end(), v[i]) - sir.begin();
            sir[pos] = v[i];
        }
        dp[i] = pos + 1;
        if (dp[i] > smax) {
            smax = dp[i];
            poz = i;
        }
    }

    fout << smax << '\n';
    int m = smax;
    for (int i = poz; i >= 1 && smax; --i) {
        if (dp[i] == smax) {
            ans[smax--] = v[i];
        }
    }

    for (int i = 1; i <= m; ++i) {
        fout << ans[i] << ' ';
    }
    return 0;
}