#include <iostream>
#include <fstream>
using namespace std;
ifstream fi("scmax.in");
ofstream g("scmax.out");
int v[100005],vr[100005],n,m,aux,f[100005],rez=-1;
int caut_bin(int x)
{
    int in,sf,mij;
    in=1;
    sf=m;
    while(in<=sf)
    {
        mij=(in+sf)/2;
        if(vr[mij]<x) sf=mij-1;
        else in=mij+1;
    }
    return in;
}
int main()
{
    fi>>n;
    for(int i=1;i<=n;i++)
        fi>>v[i];
    vr[1]=v[1];
    m++;
    f[1]++;
    for(int i=2;i<=n;i++)
    {
        aux=caut_bin(v[i]);
        if(aux>m) m++;
        vr[aux]=v[i];
        f[aux]++;
        if(rez<f[aux])
            rez=f[aux];
    }
    g<<rez;
    return 0;
}