#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[n] = 1;
    for(int i=n;i>=1;i--)
    {
        maxim = 0;
        for(int j=i+1;j<=n;j++)
            if(maxim<=val[i]&&v[i]<=v[j])
            {
                maxim = val[j];
            }
            val[i] = maxim+1;
    }
    maxim = val[1];
    for(int i=2;i<=n;i++)
    {
        if(maxim<=val[i])
        {
            maxim = val[i];
        }
    }
    printf("%d",maxim);
    return 0;
}