#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
#define X real()
#define Y imag()
using namespace std;
using P = complex<double>;
using L = pair<P,P>;
const double EPS=1e-9;

// 内積　dot(a,b) = |a||b|cosθ
double dot(P a, P b) {
  return (conj(a)*b).X;
}
// 外積　cross(a,b) = |a||b|sinθ
double cross(P a, P b) {
  return (conj(a)*b).Y;
}

// 直線と線分
bool isecLS(P a1, P a2, P b1, P b2) {
  return cross(a2-a1, b1-a1) * cross(a2-a1, b2-a1) < EPS;
}

int main(void){
    int max=1;
    int n;
    int a,b,c,d;
    cin>>n;
    vector<L> l(n);
    rep(i,n){
        cin>>a>>b>>c>>d;
        l[i]=L(P(a,b),P(c,d));
    }
    rep(i,n){
        rep(j,n){
            if(i==j)continue;
            int tmp=0;
            if(l[i].first!=l[j].first){
                rep(k,n){
                    if(isecLS(l[i].first,l[j].first,l[k].first,l[k].second)){
                        tmp++;
                    }
                }
                if(max<tmp){
                    max=tmp;
                    //cout<<i<<" "<<j<<" "<<max<<" "<<1<<endl;
                }
            }
            tmp=0;
            if(l[i].first!=l[j].second){
                rep(k,n){
                    if(isecLS(l[i].first,l[j].second,l[k].first,l[k].second)){
                        tmp++;
                    }
                }
                if(max<tmp){
                    max=tmp;
                    //cout<<i<<" "<<j<<" "<<max<<" "<<2<<endl;
                }
            }
            tmp=0;
            if(l[i].second!=l[j].second){
                rep(k,n){
                    if(isecLS(l[i].second,l[j].second,l[k].first,l[k].second)){
                        tmp++;
                    }
                }
                if(max<tmp){
                    max=tmp;
                    //cout<<i<<" "<<j<<" "<<max<<" "<<3<<endl;
                }
            }
            tmp=0;
            if(l[i].second!=l[j].first){
                rep(k,n){
                    if(isecLS(l[i].second,l[j].first,l[k].first,l[k].second)){
                        tmp++;
                    }
                }
                if(max<tmp){
                    max=tmp;
                    //cout<<i<<" "<<j<<" "<<max<<" "<<4<<endl;
                }
            }
        }
    }
    cout<<max<<endl;
}