#include <fstream>
using namespace std;

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

#define MAX 100005

int n, a[MAX], dp[MAX];

int main()
{
    cin >> n;
    for(int i = 1; i <= n; ++i)
    {
        cin >> a[i];
    }
    for(int i = 1; i <= n; ++i)
    {
        dp[i] = 1;
    }
    for(int i = 1; i <= n; ++i)
    {
        for(int j = i + 1; j <= n; ++j)
        {
            if(a[j] > a[i])
            {
                dp[j] = max(dp[j], dp[i] + 1);
            }
        }
    }
    int maxim = 0;
    for(int i = 1; i <= n; ++i)
    {
        maxim = max(maxim, dp[i]);
    }
    cout << maxim << '\n';
    return 0;
}