#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream fin;
ofstream fout;
int n=0;
vector<int> v;
vector<int> best;
int maxim;
int main ()
{
    fin.open("scmax.in");
    int x; fin>>n;
    while(fin>>x)
        v.push_back(x);
    fin.close();
    best=vector<int>(n, -1);
    maxim=1;
    best[n]=1;
    for(int i=n-2;i>=0;i--)
    {
        best[i]=1;
        for(int j=i+1;j<n;j++)
            if(v[i]<=v[j] && best[i]<best[j]+1)
            {
                best[i]=best[j]+1;
                if(best[i]>maxim)maxim=best[i];
            }

    }
    fout.open("scmax.out");
    fout<<maxim;
    fout.close();
    return 0;
}