#include<bits/stdc++.h>
using namespace std;
int a[1010];
bool f = false;
int main()
{
    int n, x, k = 0;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> x;
        f = false;
        for (int j = 1; j <= k; j++)
        {
            if (a[j] >= x)
            {
                a[j] = x;
                f = true;
                break;
            }
        }
        if (f == false)
        {
            k++;
            a[k] = x;
        }
    }
    cout << k;
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int a[1010];
bool f = false;
int main()
{
    int n, x, k = 0;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> x;
        f = false;
        for (int j = 1; j <= k; j++)
        {
            if (a[j] >= x)
            {
                a[j] = x;
                f = true;
                break;
            }
        }
        if (f == false)
        {
            k++;
            a[k] = x;
        }
    }
    cout << k;
    return 0;
}