#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int v[100009], sir[100009];
int main ()
{
    int n, i, cnt=0;
    f >> n;
    for (i=1; i<=n; i++)
        f >> v[i];
    for (i=1; i<=n; i++)
    {
        int st=1, dr=cnt, retine=0;
        while (st<=dr)
        {
            int mij=(st+dr)/2;
            if (sir[mij]>v[i])
            {
                retine=mij;
                dr=mij-1;
            }
            else st=mij+1;
        }
        if (retine) sir[retine]=v[i];
        else sir[++cnt]=v[i];
    }
    g << cnt<<'\n';
}