//https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 より
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

//

fn gcd(a: i32, b: i32) -> i32 {
    if a < 0 {
        gcd(-a, b)
    } else if b < 0 {
        gcd(a, -b)
    } else if b == 0 {
        a
    } else {
        gcd(b, a % b)
    }
}

fn run() {
    input! {
        n: usize,
        p: [(i32, i32); n],
    }
    let mut ans = 0;
    for (i, a) in p.iter().enumerate() {
        for b in p[..i].iter() {
            let dx = a.0 - b.0;
            let dy = a.1 - b.1;
            let g = gcd(dx, dy);
            let (dx, dy) = (dx / g, dy / g);
            let mut c = 0;
            for &(x, y) in p.iter() {
                for k in -100..=100 {
                    if k * dx + a.0 == x && k * dy + a.1 == y {
                        c += 1;
                        break;
                    }
                }
            }
            ans = std::cmp::max(c, ans);
        }
    }
    println!("{}", ans);
}

fn main() {
    run();
}