hard_ssc

#include <iostream>
#define N 100001
using namespace std;
int d[N],k; /// d[i]=capatul celui de-al i-lea subsir

void CautBin(int x)
{
    if(x<=d[k])
    {
        d[++k]=x;
        return ;
    }
    int st,dr,p,mid;
    p=st=1;dr=k;
    while(st<=dr)
    {
        mid=(st+dr)/2;
        if(d[mid]<x)
            p=mid,dr=mid-1;
        else
            st=mid+1;
    }
    d[p]=x;
}

int main()
{
    int n,x;
    cin>>n>>x;
    d[1]=x;
    k=1;
    for(int i=2;i<=n;++i)
        cin>>x,CautBin(x);
    cout<<k<<'\n';
    return 0;
}