#include <bits/stdc++.h>
using namespace std;

template<class T> bool iscollinear(T xa, T ya, T xb, T yb, T xc, T yc) {
    if (xa == xb && ya == yb) return false;
    if (xa == xb) return xa == xc;
    if (ya == yb) return ya == yc;
    return xa*yb-xb*ya + xb*yc-xc*yb + xc*ya-xa*yc == 0;
}

int main() {
    cin.tie(nullptr); ios::sync_with_stdio(false);

    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 = 2;
            for (int k = j+1; k < N; k++) {
                if (iscollinear(X[i], Y[i], X[j], Y[j], X[k], Y[k])) {
                    cnt++;
                }
            }
            ans = max(ans, cnt);
        }
    }
    cout << ans << endl;
}