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: i64 = itr.next().unwrap().parse().unwrap();

    let mut d = vec![0i64; n as usize + 2];
    d[1] = 1;
    for m in 1..n {
        // mの約数の個数
        let mut i = 1;
        let c = &mut d[m as usize];
        *c += m;
        while i * i <= m {
            if m % i == 0 {
                if m / i == m / (m / i) {
                    *c -= 1;
                } else {
                    *c -= 2;
                }
            }
            i += 1;
        }
    }

    let mut min = 1 << 30;
    for i in 1..n / 2 + 1 {
        min = std::cmp::min(min, (d[(n - i) as usize] - d[i as usize]).abs());
    }

    let mut ans = Vec::new();
    for i in 1..n / 2 + 1 {
        if (d[(n - i) as usize] - d[i as usize]).abs() == min {
            ans.push((i, n - i));
            ans.push((n - i, i));
        }
    }
    ans.sort();
    let mut out = Vec::new();
    for &i in ans.iter() {
        writeln!(out, "{} {}", i.0, i.1).ok();
    }
    stdout().write_all(&out).unwrap();
}