fn main() {
    let mut xx = String::new();
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut xx).ok();
    let xx: Vec<i64> = xx.split_whitespace().skip(1).flat_map(str::parse).collect();

    let pp: Vec<(i64, i64)> = xx.chunks(2).map(|x| (x[0], x[1])).collect();

    let mut max = 0;
    for &(x1, y1) in &pp {
        for &(x2, y2) in &pp {
            if (x1, y1) >= (x2, y2) {
                continue;
            }

            let n = pp
                .iter()
                .filter(|&&(x, y)| (x2 - x1) * (y - y1) == (y2 - y1) * (x - x1))
                .count();
            max = max.max(n);
        }
    }

    println!("{max}");
}