#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
#include <algorithm>
#include <utility>
#include <cmath>
#include <map>
#include <deque>
#include <vector>
#include <set>
#include <queue>
#include <bitset>
#include <limits.h>
using namespace std;

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

const int MAX_SIZE = 100000;
int v[MAX_SIZE + 1], dp[MAX_SIZE + 1];

int main() {
    ios_base::sync_with_stdio(false);
    int n;
    fin >> n;
    for (int i = 1; i <= n; ++i) {
        fin >> v[i];
        dp[i] = 1;
    }
    int maxLen = 1;
    for (int i = 1; i <= n; ++i) {
        for (int j = i - 1; j >= 0; --j) {
            if (v[j] < v[i]) {
                dp[i] = max(dp[i], dp[j] + 1);
            }
        }
        maxLen = max(maxLen, dp[i]);
    }
    fout << maxLen;
}

/*

 
 
 
 
 */