//package scmax;

import java.io.*;
import java.util.*;

public class Main {
    static final String INPUT_FILE = "scmax.in";
    static final String OUTPUT_FILE = "scmax.out";

    public static class TokenizedReader {
        private final BufferedReader reader;
        private StringTokenizer tokenizer;

        TokenizedReader(String filePath) throws FileNotFoundException {
            reader = new BufferedReader(new FileReader(filePath));
        }

        private String nextToken() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        private int nextInt() {
            return Integer.parseInt(nextToken());
        }

        public void close() throws IOException {
            reader.close();
        }
    }

    public static void main(String[] args) throws IOException {
        TokenizedReader reader = new TokenizedReader(INPUT_FILE);
        PrintWriter writer = new PrintWriter(OUTPUT_FILE);
        solve(reader, writer);
        reader.close();
        writer.flush();
        writer.close();
    }


    public static void solve(TokenizedReader reader,
                             PrintWriter writer) {
        int n = reader.nextInt();
        int[] nums = new int[n];
        for (int i = 0; i < n; ++i) {
            nums[i] = reader.nextInt();
        }

        TreeSet<Integer> lis = new TreeSet<>();
        lis.add(nums[0]);
        for (int i = 1; i < nums.length; ++i) {
            Integer ceiling = lis.ceiling(nums[i]);
            if (ceiling == null) {
                lis.add(nums[i]);
            } else {
                lis.remove(ceiling);
                lis.add(nums[i]);
            }
        }
        writer.println(lis.size());
    }
}