#include <bits/stdc++.h>

using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");

long long n, nr, a[100001], l[100001];

int main()
{
    f >> n;
    for(int i = 1; i <= n; i++)
        f >> a[i];
    nr = 1;
    l[nr] = a[1];
    for (int i = 2; i <= n; i++) {
        if (a[i] >= l[nr]) {
            l[++nr] = a[i];
        }
        else {
            long long st = 1, dr = nr, poz = nr + 1, mij;
            while (st <= dr) {
                mij = (st + dr) / 2;
                if (l[mij] > a[i]) {
                    poz = mij;
                    dr = mij - 1;
                }
                else
                    st = mij + 1;
            }
            l[poz] = a[i];
        }
    }
    g << nr;
    f.close();
    g.close();
    return 0;
}