#include "bits/stdc++.h"

#define MOD 1000000007
#define rep(i, n) for(ll i=0; i < (n); i++)
#define ALL(v) v.begin(),v.end()
#define FOR(i, j, k) for(ll i=j;i<k;i++)
#define DUMP(i, v)for(ll i=0;i<v.size();i++)cout<<v[i]<<" "

using namespace std;
typedef long long int ll;
typedef vector<ll> llvec;
typedef vector<double> dvec;
typedef pair<ll, ll> P;
typedef long double ld;
struct Edge{ll from, to, cost;};
struct node{ll cost, to;
  bool friend operator>(node a, node b){
    return a.cost>b.cost;
  }
};

ll mod(ll a, ll mod){
  ll res = a%mod;
  if(res<0)res=res + mod;
  return res;
}

ll modpow(ll a, ll n, ll mod){
  ll res=1;
  while(n>0){
    if(n&1) res=res*a%mod;
    a=a*a%mod;
    n>>=1;
  }
  return res;
}

ll modinv(ll a, ll mod){
  return modpow(a, mod-2, mod);
}

ll gcd(ll a, ll b){
  ll r = a%b;
  if(r==0) return b;
  else return gcd(b, a%b);
}

bool is_prime(ll n){
  ll i = 2;
  if(n==1)return false;
  if(n==2)return true;
  bool res = true;
  while(i*i <n){
    if(n%i==0){
      res = false;
    }
    i = i+1;
  }

  //if(i==1)res = false;
  if(n%i==0)res=false;
  return res;
}

ll c(ll a){
  ll i=1;
  while(i*(i-1)<=2*a){
    if(i*(i-1)==2*a)return i;
    i++;
  }
  return i;
}

/**************************************
** A main function starts from here  **
***************************************/
int main(){
  ll N;
  cin >> N;
  llvec x(N), y(N);
  rep(i, N)cin >> x[i] >> y[i];
  ll ans = 0;
  rep(i, N){
    map<double, ll> cnt;
    FOR(j, i+1, N){
      ll a=x[j]-x[i];
      ll b=y[j]-y[i];
      if(a==0)cnt[2000]++;
      else cnt[(double)(b/a)]++;
    }
    for(auto i:cnt){
      ans = max(ans, i.second);
    }
  }
  cout << c(ans);
  return 0;
}