#include <bits/stdc++.h>
using namespace std;
class InputReader {
    public:
        InputReader() {}
        InputReader(const char *file_name) {
            input_file = fopen(file_name, "r");
            cursor = 0;
            fread(buffer, SIZE, 1, input_file);
        }
        inline InputReader &operator >>(int &n) {
            while((buffer[cursor] < '0' || buffer[cursor] > '9')&& buffer[cursor]!='-') {
                advance();
            }
            semn=1;
            if(buffer[cursor]=='-')
            {
                semn=-1;
                advance();
            }
            n = 0;
            while('0' <= buffer[cursor] && buffer[cursor] <= '9') {
                n = n * 10 + buffer[cursor] - '0';
                advance();
            }
            n*=semn;
            return *this;
        }
    private:
        FILE *input_file;
        static const int SIZE = 1 << 20;
        int cursor,semn;
        char buffer[SIZE];
        inline void advance() {
            ++ cursor;
            if(cursor == SIZE) {
                cursor = 0;
                fread(buffer, SIZE, 1, input_file);
            }
        }
}f("rays.in");
ofstream g("rays.out");
int X,y_,Y_,n,i,nr;
vector<pair<double,double> > V[2];
double x,y,ult;
void solve(int x)
{
    sort(V[x].begin(),V[x].end());
    ult=-(1<<30);
    for(i=0;i<V[x].size();++i)
    if(V[x][i].second>ult) ult=V[x][i].first,++nr;
}
int main()
{
    f>>n;
    for(i=1;i<=n;++i)
    {
        f>>X>>y_>>Y_;
        if(y_>Y_) swap(y_,Y_);
        x=1.0*y_/X;
        y=1.0*Y_/X;
        if(X<0) V[0].push_back(make_pair(-y,-x));
        else V[1].push_back(make_pair(y,x));
    }
    solve(0);
    solve(1);
    g<<nr;
    return 0;
}