// Determinati lungimea subsitului crescator maximal (SCMAX)

#include <fstream>

using namespace std;

ifstream cin("scmax.in");
ofstream cout("scmax.out");

int SCMAX(int n, vector<int> v) {
    vector<int> dp(n);
    dp[0] = 1;

    for (int i = 1; i < n; i++) {
        int max = 0;
        for (int j = 0; j < i; j++) {
            if (v[i] > v[j]) {
                if (dp[j] > max) {
                    max = dp[j];
                }
            }
        }
        if (max) {
            dp[i] = max + 1;
        } else {
            dp[i] = 1;
        }
    }

    int max = dp[1];
    for (int i = 1; i < n; i++) {
        if (dp[i] > max) {
            max = dp[i];
        }
    }

    return max;
}

int main() {
    int n;
    int v[100001];

    cin >> n;

    for (int i = 0; i < n; i++) {
        cin >> v[i];
    }
    
    cout << SCMAX(n, v) << endl;

    cin.close();
    cout.close();

    return 0;
}