#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int N;
int v[10100];
int dp[10100], dp2[10100], p[10100];
int main()
{
    fin >> N;
    for(int i = 1; i <= N; i ++)
    {
        fin >> v[i];
    }
    int k = 1, ans = 1;
    dp[k] = 1;
    p[k] = v[1];
    for(int i = 2; i <= N; i ++)
    {
        if(v[i] > p[k])
        {
            dp[i] = dp[k] + 1;
            p[++k] = v[i];
        }
        else
        {
            if(p[k] > v[i])
            {
                int st = 1, dr = k;
                int poz = 0, mijloc = 0;
                while(st <= dr)
                {
                    mijloc = (st + dr) / 2;
                    if(v[i] > v[mijloc])
                    {
                        st = mijloc + 1;
                    }
                    else
                    {
                        poz = mijloc;
                        dr = mijloc - 1;
                    }
                }
                p[poz] = v[i];
                dp[i] = dp[i-1];
            }
        }
        ans = max(ans,dp[i]);
    }
    fout << ans;
}