#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  vector<pair<int, int>> v(n);
  rep(i, n) cin >> v[i].first >> v[i].second;
  int ans = 0;
  rep(i, n) rep(j, n) {
    if (i >= j) continue;
    int cnt = 2;
    int dx = v[i].first - v[j].first, dy = v[i].second - v[j].second;
    rep(k, n) {
      if (k == i || k == j) continue;
      int x = v[k].first - v[i].first, y = v[k].second - v[i].second;
      if (dx * y == dy * x) cnt++;
    }
    ans = max(ans, cnt);
  }
  cout << ans << endl;
  return 0;
}