#include <iostream>
#include <vector>
#include <algorithm>
#include <array>
#include <cmath>
#define repeat(i,n) for (int i = 0; (i) < int(n); ++(i))
#define whole(f,x,...) ([&](decltype((x)) whole) { return (f)(begin(whole), end(whole), ## __VA_ARGS__); })(x)
typedef long long ll;
using namespace std;
const long double eps = 1e-18;
int main() {
    int n; cin >> n;
    array<vector<long double>, 3> qs = {};
    repeat (i,n) {
        int p, a, b; cin >> p >> a >> b;
        qs[p].push_back(a /(long double) (a + b));
    }
    repeat (i,3) {
        qs[i].push_back(1);
        whole(sort, qs[i]);
    }
    ll cnt = 0;
    repeat (i,3) {
        for (long double q1 : qs[(i + 1) % 3]) {
            for (long double q2 : qs[(i + 2) % 3]) {
                long double qm = max(1 - q1, 1 - q2);
                long double qc = (1 - q1) + (1 - q2);
                if (qc <= 1) {
                    int lm = whole(lower_bound, qs[i], qm - eps) - qs[i].begin();
                    int lc = whole(lower_bound, qs[i], qc - eps) - qs[i].begin();
                    cnt += qs[i].size() - lm - (abs(qs[i][lc] - qc) < eps);
                }
            }
        }
    }
    cout << cnt / 3 << endl;
    return 0;
}