#include <iostream>
#include <fstream>
#include <stdio.h>

using namespace std;

const int CMAX = 1e5+15;
int v[CMAX] , n , val[CMAX] , maxim = 1;

int main()
{
    freopen ("scmax.in","r",stdin);
    freopen ("scmax.out","w",stdout);
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
        scanf("%d",&v[i]);
    val[1] = 1;
    for(int i=2;i<=n;i++)
    {
        val[i] = 1;
        for(int j=i-1;j>=1;j--)
        {
            if(v[i]>v[j])
                val[i] = max(val[i],val[j]+1);
        }
        maxim = max(maxim,val[i]);
    }
    printf("%d",maxim);
    return 0;
}