#include<fstream>
using namespace std;
int a[100001],d[100005];
int main()
{
    ifstream f("scmax.in");
    ofstream g("scmax.out");
    int i,n,j,max=-1;
    f>>n;
    for(i=1;i<=n;++i)
    {
        f>>a[i];
    }
    d[1]=1;
    for(i=1;i<=n;++i)
    {
        max=0;
            for(j=1;j<=i-1;++j)
                if(d[j]>max && a[j]<a[i])
                    max=d[j];
        d[i]=1+max;
    }
    max=-1;
    for(i=1;i<=n;++i)
        if(d[i]>max)
            max=d[i];
    g<<max;



}