use std::io;

fn main() {
    let mut input = String::new();
    io::stdin().read_line(&mut input).expect("Failed to read input");
    let n: i32 = input.trim().parse().expect("Invalid input");

    let mut ans = Vec::new();

    for x in 0..=n {
        for y in 0..=n {
            if x * y > n {
                break;
            }

            if x + y != 0 && (n - x * y) % (x + y) == 0 {
                ans.push((x, y, (n - x * y) / (x + y)));
            }
        }
    }

    println!("{}", ans.len());
    for (x, y, z) in ans {
        println!("{} {} {}", x, y, z);
    }
}