#include<fstream>
#include<algorithm>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
long v[100010];
int n,l[100010],m,x;
int main()
{
    f>>n;
    for(int i=1;i<=n;++i) f>>v[i];
    for(int i=1;i<=n;++i)
    {
        if(l[i]==0) l[i]++;
        for(int j=i+1;j<=n;++j)
        {
            if(v[i]<v[j]&&l[j]<l[i]+1)
            {
                l[j]=l[i]+1;
            }
        }
    }
    m=-1;
    for(int k=1;k<=n;k++) m=max(m,l[k]);
    g<<m<<'\n';
}