#include<fstream>
using namespace std;
int main()
{
    int N,v[100001],i,stare[100001],j,max,cml,imax,subsir[100001],k=1,n;
    ifstream in("scmax.in");
    ofstream out("scmax.out");
    in>>N;
    for(i=1;i<=N;i++)
    {
        in>>v[i];
    }
    stare[1]=1;
    for(i=2;i<=N;i++)
    {
        max=0;
        for(j=1;j<i;j++)
        {
            if(v[j]<v[i] && stare[j]>max)
            {
                max=stare[j];
            }
        }
        stare[i]=max+1;
        if(stare[i]>cml)
        {
            cml=stare[i];
            imax=i;
        }
    }
    out<<cml;

}