#include<bits/stdc++.h>
using namespace std;
ifstream in("rays.in");
ofstream out("rays.out");

struct sgm{
    long long x, y1, y2;
};

int n, ans;
vector<sgm> vd,vs;
sgm aux;

bool cmp(sgm a, sgm b){
    return (a.y2*b.x < a.x*b.y2);
}

void exec(vector<sgm> &v)
{
    sort(v.begin(),v.end(),cmp);
    if(!v.empty())
    {
        int x = v[0].x;
        int y = v[0].y2;
        ++ans;
        for(int i = 1; i<v.size(); i++)
        {
            if(y*v[i].x < x*v[i].y1)
            {
                ++ans;
                x=v[i].x;
                y=v[i].y2;
            }
        }
    }
}

int main()
{
    int player_unu=0;

    in>>n;
    for (int i = 1; i<=n; i++)
    {
        in>>aux.x>>aux.y1>>aux.y2;
        if (aux.y1>aux.y2)
            swap(aux.y1, aux.y2);
        if (aux.x>0)
        {
            vd.push_back(aux);
        }
        else
        {
            aux.x *= -1;
            vs.push_back(aux);
        }
    }
    exec(vd);
    exec(vs);
    out<<ans<<'\n';
    return 0;
}