#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std;
int n;
set<long double> s;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  cout.precision(30);
  cerr.precision(7);
  ;
  cin >> n;
  while (n--) {
    long double k, b;
    cin >> k >> b;
    if (k) s.insert(-b / k);
  }
  cout << s.size();
  return 0;
}
