#include <bits/stdc++.h>
using namespace std;

int main(){
  int N;
  cin >> N;
  vector<pair<int, int>> A(N);
  for (auto& [x, y] : A) cin >> x >> y;
  
  int ans = 0;
  for (int i = 0; i <= 100; i++){
    int cnt = ranges::count_if(A, [&](auto x){return x.first == i;});
    ans = max(ans, cnt);
  }
  for (int a = -100; a <= 100; a++){
    for (int b = -10000; b <= 10000; b++){
      int cnt = ranges::count_if(A, [&](auto x){return a*x.first+b == x.second;});
      ans = max(ans, cnt);
    }
  }
  
  cout << ans << endl;
}