import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.*;

public class Main {

    static BufferedReader in;
    static PrintWriter out;
    static StringTokenizer tok;

    void solve() throws IOException {
        int n = ni();
        int[] a = nia(n);

        int[] l = new int[n];
        Arrays.fill(l, 1 << 30);

        for (int i = 0; i < n; i++) {
            int idx = lowerBound(l, a[i]);
            l[idx] = a[i];
        }

        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if (l[i] != 1 << 30) cnt++;
        }

        out.println(n - cnt);
    }

    int lowerBound(int[] a, long x) {
        int high = a.length;
        int low = 0;
        while (high > low) {
            int mid = (high + low) / 2;
            if (a[mid] < x) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }

    String ns() throws IOException {
        while (!tok.hasMoreTokens()) {
            tok = new StringTokenizer(in.readLine(), " ");
        }
        return tok.nextToken();
    }

    int ni() throws IOException {
        return Integer.parseInt(ns());
    }

    long nl() throws IOException {
        return Long.parseLong(ns());
    }

    double nd() throws IOException {
        return Double.parseDouble(ns());
    }

    String[] nsa(int n) throws IOException {
        String[] res = new String[n];
        for (int i = 0; i < n; i++) {
            res[i] = ns();
        }
        return res;
    }

    int[] nia(int n) throws IOException {
        int[] res = new int[n];
        for (int i = 0; i < n; i++) {
            res[i] = ni();
        }
        return res;
    }

    long[] nla(int n) throws IOException {
        long[] res = new long[n];
        for (int i = 0; i < n; i++) {
            res[i] = nl();
        }
        return res;
    }

    public static void main(String[] args) throws IOException {
        in = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);
        tok = new StringTokenizer("");
        Main main = new Main();
        main.solve();
        out.close();
    }
}