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

int main() {
  int n;
  cin >> n;
  vector<int> x(n), y(n);
  for (int i = 0; i < n; i++) cin >> x[i] >> y[i];
  int ans = 0;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < i; j++) {
      int dx = x[j] - x[i], dy = y[j] - y[i];
      int cnt = 0;
      for (int k = 0; k < n; k++) {
        int ex = x[k] - x[i], ey = y[k] - y[i];
        if (dx * ey == dy * ex) cnt++;
      }
      ans = max(ans, cnt);
    }
  }
  cout << ans << endl;
  return 0;
}