#include <iostream>
#include <fstream>
using namespace std;
int pd[100001],a[100001],n;
int main()
{int i,j;
    ifstream in("scmax.in");
    ofstream out("scmax.out");
    in>>n;
    for (i=1;i<=n;i++)
    {
        in>>a[i];
        for (j=1;j<i;j++)
            if ((a[i]>a[j])&&(pd[j]+1>pd[i]))
                pd[i]=pd[j]+1;
    }
    out<<pd[n]+1<<"\n";
    out.close();
    in.close();
    return 0;
}