#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,L[100010],a[100010],i,j,prim,succ[100010],lmax;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
        f>>a[i];
    L[n]=1;
    succ[n]=0;
    for(i=n-1;i>=1;i--)
    {
        for(j=i+1;j<=n;j++)
            if(a[j]>a[i])
                if(L[j]>=L[i])
                {
                    L[i]=L[j]+1;
                    succ[i]=j;
                }
        if(lmax<L[i])
        {
            lmax=L[i];
            prim=i;
        }
    }
    g<<lmax;
    return 0;
}