use std::collections::HashMap;


fn calc(val: usize) -> usize {
    let mut ret = 0usize;
    for i in 1..=(val as f64).sqrt() as usize {
        if val % i == 0 {
            ret += i;
            if i != val / i {
                ret += val / i;
            }
        }
    }
    ret
}

fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();

    if n == 0 {
        println!("-1");
        return;
    }
    let nstr = format!("{:b}", n).chars().collect::<Vec<_>>();
    let mut length = nstr.len();
    let mut result = vec![];
    let mut base = 1usize << (length-1);
    let mut current = 0usize;
    loop {
        while format!("{:b}", calc(base)).len() != length {
            base += 1;
        }
        current ^= calc(base);
        result.push(base);
        if current == n { break; }
        let current_str = format!("{:b}", current).chars().collect::<Vec<_>>();
        length = nstr.len() - (0..nstr.len()).filter(|&i| nstr[i] != current_str[i]).nth(0).unwrap();
        base = 1usize << (length - 1);
    }
    println!("{}", result.len());
    println!("{}", result.iter().map(|v| v.to_string()).collect::<Vec<_>>().join(" "));
}