#include <bits/stdc++.h>
using namespace std;

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

int n;
const int Max = 1e5 + 1;
vector<int> a(Max), dp;

int main()
{
    ios::sync_with_stdio(false);
    fin.tie(NULL);

    fin >> n;
    for(int i = 1; i <= n; ++i)
        fin >> a[i];
    dp.push_back(a[1]);
    for(int i = 2; i <= n; ++i)
    {
        if(a[i] > dp.back())
            dp.push_back(a[i]);
        else
            dp[lower_bound(dp.begin(), dp.end(), a[i]) - dp.begin()] = a[i];
    }
    fout << dp.size() << "\n";

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