#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int N;
  cin >> N;
  vector<int> X(N), Y(N);
  for (int i = 0; i < N; i++) {
    cin >> X[i] >> Y[i];
  }
  auto f = [](int a, int b, int c, int d, int x, int y) {
    if (a - c == 0) return false;
    return (b - d) % (a - c) == 0 && y == (b - d) / (a - c) * (x - a) + b;
  };
  int res = 0;
  for (int i = 0; i < N; i++) {
    for (int j = i + 1; j < N; j++) {
      int cnt = 0;
      for (int k = 0; k < N; k++) {
        if (f(X[i], Y[i], X[j], Y[j], X[k], Y[k])) cnt++;
      }
      res = max(res, cnt);
    }
  }
  cout << res << '\n';
  return 0;
}