7/65

#include <iostream>
using namespace std;

typedef struct
{
    int num, numi;
} FRAC;

int main()
{
    FRAC f[100];
    int n;
    cout << "n=";
    cin >> n;
    for (int i = 0; i < n; i++)
        cin >> f[i].numi >> f[i].num;

    for (int i = 0; i < n; i++)
    {
        int a = f[i].numi, b = f[i].num, r;
        while (b)
        {
            r = a % b;
            a = b;
            b = r;
        }

        int cmmdc = a;
        f[i].numi /= cmmdc;
        f[i].num /= cmmdc;
    }

    int cnt = 0;
    for (int i = 0; i < n - 1; i++)
        if (f[i].num == f[n - 1].num && f[i].numi == f[n - 1].numi)
            cnt++;

    cout << cnt;
    return 0;
}