#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream f("scmax.in");
    ofstream o("scmax.out");

    int n, v[100001];
    f>>n;

    for(int i=1;i<=n;i++)
    {
        f>>v[i];
    }

    int b[n+1];

    for(int i=1;i<n;i++)
    {
        b[i]=1;
        for(int j=1;j<i;j++)
            if(v[i]>v[j] && b[i]<b[j]+1)
                b[i]=b[i]+1;
    }
    int max=0;
    for(int i=1;i<=n;i++)
        if(b[i]>max)
            max=b[i];

    //cout<<max+1;
    o<<max+1;
    return 0;
}