Za dime od oli <3

import java.util.Scanner;


public class LDS {


    private static int najdolgaOpagackaSekvenca(int[] a) {

        int[] max = new int[a.length];
        for(int i=0; i<a.length; i++)
        {
            max[i]=1;
            for(int j=0; j<i; j++)
            {
                if(a[i]<a[j])
                    if(max[i]<max[j]+1)
                    	max[i]=max[j]+1;
            }
        }
        int rez = max[0];
        for(int i=1; i<max.length; i++)
        {
            if(rez<max[i])
                rez=max[i];
        }
        return rez;
    }

    public static void main(String[] args) {
        Scanner stdin = new Scanner(System.in);

        int n = stdin.nextInt();
        int a[] = new int[n];
        for (int i = 0; i < a.length; i++) {
            a[i] = stdin.nextInt();
        }
        System.out.println(najdolgaOpagackaSekvenca(a));
    }


}