#include<iostream>

#include<map>

#include<vector>

using namespace std;

//y=kx+z

typedef struct{

	double k;

	double z;

	int count;

}Skzc;

int main(int argc, char *argv[]){

	int inputCunt;

	while(cin>>inputCunt && inputCunt!=0){

		if(inputCunt==0){

			break;

		}

		//(x,y)

		multimap<int,int> place;

		vector<Skzc> kzcVector;

		map<int, int> countMap;

		int resultCount=1;

		int x,y;

		int verticalFlyCunt=0;

		Skzc kzc;

		bool findFlag=false;

		for(int i=0;i<inputCunt;i++){

			cin>>x>>y;

			place.insert(pair<int,int>(x,y));

		}

		//input finish and sort

		for(multimap<int, int>::iterator iter1=place.begin();

			iter1!=place.end();

			++iter1){

			x=iter1->first;

			y=iter1->second;

			for(multimap<int, int>::iterator iter3=place.begin();

					iter3!=iter1;

					++iter3){

				if(x-iter3->first==0){

					verticalFlyCunt++;

				}else{

					kzc.k=1.0*(y-iter3->second)/(x-iter3->first);

					kzc.z=y-kzc.k*x;

					for(vector<Skzc>::iterator iter2=kzcVector.begin();

							iter2!=kzcVector.end();

							++iter2){

						if(iter2->k==kzc.k &&

								iter2->z==kzc.z){

							iter2->count++;

							if(iter2->count>resultCount){

								resultCount=iter2->count;

							}

							findFlag=true;

							break;

						}else{

							findFlag=false;

						}

					}

					if(findFlag==false){

						kzc.count=1;

						kzcVector.push_back(kzc);

					}

				}

			}

		}

		if(resultCount>verticalFlyCunt){

			cout<<resultCount<<endl;

		}else{

			cout<<verticalFlyCunt<<endl;

		}

	}

	return 0;

}