#include <iostream>
#include <vector>
#include <set>
#include <numeric>
#include <algorithm>
#include <cmath>

using namespace std;

// 计算一个数的质因数的最小公倍数
long long lcm(long long a, long long b) {
    return a / __gcd(a, b) * b;
}

// 计算一个城堡的完美度
long long calculateCastlePerfectness(const vector<pair<int, int>>& blocks) {
    long long product = 1;
    for (const auto& block : blocks) {
        product *= pow(block.first, block.second);
    }
    return product;
}

int main() {
    int n;
    cin >> n;

    vector<long long> perfectness(n);
    vector<vector<pair<int, int>>> castles(n);

    for (int i = 0; i < n; ++i) {
        int ti;
        cin >> ti;
        castles[i].resize(ti);
        for (int j = 0; j < ti; ++j) {
            int Pij, Cij;
            cin >> Pij >> Cij;
            castles[i][j] = {Pij, Cij};
        }
        perfectness[i] = calculateCastlePerfectness(castles[i]);
    }

    // 计算总完美度
    set<long long> uniquePerfectness;
    for (int i = 0; i < n; ++i) {
        long long currentLcm = 1;
        for (int j = 0; j < n; ++j) {
            if (j != i) {
                currentLcm = lcm(currentLcm, perfectness[j]);
            }
        }
        uniquePerfectness.insert(currentLcm);
    }

    // 输出不同的总完美度的种数
    cout << uniquePerfectness.size() << endl;

    return 0;
}