#include <bits/stdc++.h>

using namespace std;
const int N = 1010;
int n;
int a[N], f[N];
int res;

int main() {
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 1; i <= n; i++) {
        f[i] = 1;
        for (int j = 1; j < i; j++)
            if (a[i] > a[j]) f[i] = max(f[i], f[j] + 1);
        res = max(res, f[i]);
    }
    printf("%d", res);
    return 0;
}