#include <fstream>
using namespace std;
int v[100005],best[100005];
int main()
{
    ifstream cin("scmax.in");
    ofstream cout("scmax.out");
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)
        cin>>v[i];
    best[1]=v[1];
    int cnt=1;
    for(int i=2;i<=n;i++)
    {
        int st=1,dr=cnt;
        if(v[i]>best[cnt])
            best[++cnt]=v[i];
        else
        {
            int retin=0;
            while(st<=dr)
            {
                int mij=(st+dr)/2;
                if(best[mij]<=v[i])
                {
                    retin=mij;
                    st=mij+1;
                }
                else
                    dr=mij-1;
            }
            if(retin==0)
                best[1]=v[i];
            else
                best[retin]=v[i];
        }
    }
    cout<<cnt;
    return 0;
}