#include <bits/stdc++.h>

using namespace std;

class InParser {
private:
    FILE *fin;
    char *buff;
    int sp;

    char read_ch() {
        ++sp;
        if (sp == 4096) {
            sp = 0;
            fread(buff, 1, 4096, fin);
        }
        return buff[sp];
    }

public:
    InParser(const char* nume) {
        fin = fopen(nume, "r");
        buff = new char[4096]();
        sp = 4095;
    }

    InParser& operator >> (int &n) {
        char c;
        while (!isdigit(c = read_ch()) && c != '-');
        int sgn = 1;
        if (c == '-') {
            n = 0;
            sgn = -1;
        } else {
            n = c - '0';
        }
        while (isdigit(c = read_ch())) {
            n = 10 * n + c - '0';
        }
        n *= sgn;
        return *this;
    }

    InParser& operator >> (long long &n) {
        char c;
        n = 0;
        while (!isdigit(c = read_ch()) && c != '-');
        long long sgn = 1;
        if (c == '-') {
            n = 0;
            sgn = -1;
        } else {
            n = c - '0';
        }
        while (isdigit(c = read_ch())) {
            n = 10 * n + c - '0';
        }
        n *= sgn;
        return *this;
    }
};

int n, x;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    InParser _cin("gogosi.in");
    ofstream cout("gogosi.out");

    vector < int > v;

    _cin >> n >> x;

    v.push_back( x );

    for (int i = 1; i < n; i++){
        _cin >> x;

        int left = 0; int right = v.size() - 1;

        while (right > left){

            int mid = (left + right) / 2;

            if (v[ mid ] <= x)
                right = mid;

            else
                left = mid + 1;
        }

        if (v[ right ] <= x)
            v[ right ] = x;

        else
            v.push_back( x );
    }
    cout << v.size();
}