#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int n;cin>>n;
  vector<int> a(n),b(n);
  rep(i,n)cin>>a[i]>>b[i];
  int cnt,ans=2;
  rep(i,101){
  rep(j,101){
    cnt=0;
    rep(k,n){
      if(i*a[k]+j==b[k]){
        cout<<i<<" "<<j<<" "<<k<<endl;
        cnt++;
      }
    }
    ans=max(cnt,ans);
  }
  }
  cout<<ans<<endl;
}