use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: usize = itr.next().unwrap().parse().unwrap();
    let a: Vec<(i64, i64)> = (0..n)
        .map(|_| {
            (
                itr.next().unwrap().parse().unwrap(),
                itr.next().unwrap().parse().unwrap(),
            )
        })
        .collect();

    let mut ans = 0;

    for i in 0..n {
        for j in i + 1..n {
            let b = a[j].1 - a[i].1;
            let d = a[j].0 - a[i].0;
            let c = d * a[j].1 - b * a[j].0;
            let mut cnt = 2;
            for k in 0..n {
                if k == i || k == j {
                    continue;
                }
                if a[k].1 * d == b * a[k].0 + c {
                    cnt += 1;
                }
            }
            ans = std::cmp::max(ans, cnt);
        }
    }
    println!("{}", ans);
}