#include <bits/stdc++.h>

int main(){
  int N; std::cin >> N;

  std::vector<int> x(N), y(N);
  for(int i = 0; i < N; ++i){
    std::cin >> x[i] >> y[i];
  }

  int ans = 0;

  for(int i = 0; i < N; ++i){
    for(int j = 0; j < N; ++j){
      if(i != j){
        int cnt = 0;

        for(int k = 0; k < N; ++k){
          if((x[j]-x[i]) * (y[k]-y[i]) == (y[j]-y[i]) * (x[k]-x[i])){
            ++cnt;
          }
        }

        ans = std::max(ans, cnt);
      }
    }
  }
  
  std::cout << ans << std::endl;

  return 0;
}