#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cmath>

using namespace std;

int main(void) {
    int N;
    cin >> N;
    vector<int> X(N), Y(N);
    for(int i=0; i<N; i++) {
        cin >> X[i] >> Y[i];
    }

    int ans = 0;
    for(int i=0; i<N; i++) {
        for(int j=i+1; j<N; 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 = max(ans, cnt);
        }
    }

    cout << ans << endl;
    return 0;
}