#include <iostream>
using namespace std;
int main(void){
    int n;
    cin >> n;
    int xy[n][2];
    for(int i = 0; i < n; i++){
        cin >> xy[i][0] >> xy[i][1];
    }
    int ans = 0, tmp;
    double dx, dy, ddx, ddy;
    for (int i = 0; i < n; i++){
        for (int j = i + 1; j < n; j++){
            tmp = 2;
            dx = xy[i][0] - xy[j][0];
            dy = xy[i][1] - xy[j][1];
            for(int k = j + 1; k < n; k++){
                ddx = xy[i][0] - xy[k][0];
                ddy = xy[i][1] - xy[k][1];
                if (dx == 0){
                    if (xy[i][0] == xy[k][0]) tmp++;
                }
                else if (dy == 0){
                    if (xy[i][1] == xy[k][1]) tmp++;
                }
                else if(dx / ddx == dy / ddy) tmp++;
            }
            ans = max(ans, tmp);
        }
    }
    cout << ans << endl;
}