#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)

int cross(int ax, int ay, int bx, int by){
	return ay*by-ay*bx;
}

int main(){
	int n; cin>>n;
	vector<int> x(n),y(n);
	rep(i,n) cin>>x[i]>>y[i];
	
	int ans=0;
	rep(i,n) rep(j,i){
		int tmp=0;
		rep(k,n){
			if(cross(x[j]-x[i],y[j]-y[i],x[k]-x[i],y[k]-y[i])==0) ++tmp;
		}
		ans=max(ans,tmp);
	}
	cout<<ans<<endl;
}