#define MAX_N 100000

#include <fstream>
using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int n, l, PD[MAX_N + 1];

void Cb(int x);

int main()
{
    fin >> n;
    for (int i = 1, x; i <= n; ++i)
    {
        fin >> x;
        Cb(x);
    }

    fout << l << '\n';

    fin.close();
    fout.close();
    return 0;
}

void Cb(int x)
{
    if (PD[l] == x) { return; }

    if (PD[l] < x)
    {
        PD[++l] = x;
        return;
    }

    int st = 1, dr = l, mij, res;
    while (st <= dr)
    {
        mij = (st + dr) / 2;
        if (PD[mij] > x)
        {
            res = mij;
            dr = mij - 1;
        }
        else
        {
            st = mij + 1;
        }
    }

    PD[res] = x;
}