#include <bits/stdc++.h>

using namespace std;
ifstream f("rays.in");
ofstream g("rays.out");
struct segment
{
    int x,y1,y2;
};
int n,nr,X,Y;
vector <segment> v,u;
inline int cmp(const segment &a, const segment &b)
{
    if(1LL*a.x*b.y2>1LL*b.x*a.y2) return 1;
    else return 0;
}
int main()
{
    f>>n;
    while(n--)
    {
        segment seg;
        f>>seg.x>>seg.y1>>seg.y2;
        if(seg.y1>seg.y2) swap(seg.y1,seg.y2);
        if(seg.x>0) v.push_back(seg);
        else
        {
            seg.x=-seg.x;
            u.push_back(seg);
        }
    }
    sort(v.begin(),v.end(),cmp);
    if(v.size()!=0)
    {
        ++nr;
        X=v[0].x,Y=v[0].y2;
        unsigned dv=v.size();
        for(unsigned i=1; i<dv; ++i)
            if(1LL*X*v[i].y1>1LL*Y*v[i].x)
            {
                nr++;
                X=v[i].x;
                Y=v[i].y2;
            }
    }
    sort(u.begin(),u.end(),cmp);
    if(u.size()!=0)
    {
        ++nr;
        X=u[0].x,Y=u[0].y2;
        unsigned du=u.size();
        for(unsigned i=1; i<du; ++i)
        {
            if(1LL*X*u[i].y1>1LL*Y*u[i].x)
            {
                nr++;
                X=u[i].x;
                Y=u[i].y2;
            }
        }
    }
    g<<nr<<'\n';
    return 0;
}