#include <bits/stdc++.h>

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

#define MAXN 100005
int n;
int a[MAXN], dp[MAXN];
int maxx = INT_MIN, cont;

int main() {
    fin >> n;
    for (int i = 1; i <= n; i ++)
        fin >> a[i];
    for (int i = 1; i <= n; i++) {
        dp[i] = 1;
        for (int j = 1; j < i; j ++)
            if (a[j] < a[i])
                dp[i] = max(dp[i], dp[j] + 1);
    }
    int poz = 1;
    for (int i = 1; i <= n; i ++)
        if (dp[i] > dp[poz])
            poz = i;
    fout << dp[poz];

    return 0;
}