#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

int main() {
    int n;
    cin >> n;
    vector<double> 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-1; i++) {
        int cnt = 2;
        double a, b;
        a = (y[i]-y[i+1])/(x[i]-x[i+1]);
        b = y[i] - a*x[i];
        for (int j=i+2; j<n; j++)
            if (a*x[j]+b-0.1 < y[j] && y[j] < a*x[j]+b+0.1) cnt++;
        ans = max(ans, cnt);
    }

    cout << ans << endl;
}