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

int main() {
    int n;
    cin >> n;
    vector<pair<int, int>> dat;
    for (int i = 0; i < n; i++) {
        double a, b;
        cin >> a >> b;
        dat.emplace_back(a, b);
    }
    
    auto dxdy = [&] (int i, int j) -> pair<int, int> {
        int dx = abs(dat[i].first - dat[j].first);
        int dy = abs(dat[i].second - dat[j].second);
        return {dx, dy};
    };
    
    int ans = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) if (i != j) {
            int res = 0;
            int dx, dy; tie(dx, dy) = dxdy(i, j);
            for (int k = 0; k < n; k++) {
                int dx2, dy2;
                tie(dx2, dy2) = dxdy(i, k);
                if (dy * dx2 == dx * dy2) res++;
            }
            ans = max(ans, res);
        }
    }
    
    cout << ans << '\n';
    
    return 0;
}