#line 1 "/mnt/c/Users/leafc/dev/compro/lib/template.hpp"


#include <bits/stdc++.h>
#define REP(i, n) for (int i = 0; i < n; i++)
#define FOR(i, m, n) for (int i = m; i < n; i++)
#define ALL(v) (v).begin(), (v).end()
#define coutd(n) cout << fixed << setprecision(n)
#define ll long long int
#define vl vector<ll>
#define vi vector<int>
#define MM << " " <<

using namespace std;

template <class T> void say(bool val, T yes = "Yes", T no = "No") { cout << (val ? yes : no) << endl; }

template <class T> void chmin(T &a, T b) {
  if (a > b)
    a = b;
}

template <class T> void chmax(T &a, T b) {
  if (a < b)
    a = b;
}


#line 2 "tmp.cpp"

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  int n;
  cin >> n;
  vi x(n), y(n);
  REP(i, n) { cin >> x[i] >> y[i]; }

  int ans = 0;
  REP(i, n) {
    FOR(j, i + 1, n) {
      int tmp = 0;
      if (x[i] != x[j] && y[i] != y[j]) {
        REP(k, n) {
          if ((y[k] - y[i]) * (y[i] - y[j]) == (x[k] - x[i]) * (x[i] - x[j]))
            tmp++;
        }
      } else if (x[i] == x[j]) {
        REP(k, n) {
          if (x[i] == x[k])
            tmp++;
        }
      } else if (y[i] == y[j]) {
        REP(k, n) {
          if (y[i] == y[k])
            tmp++;
        }
      }
      chmax(ans, tmp);
    }
  }
  cout << ans << endl;
  return 0;
}