use std::io::Read;

fn solve(abc: Vec<f64>) {
    let a = abc[0];
    let b = abc[1];
    let c = abc[2];
    let temp = b * b - 4f64 * a * c;
    if temp > 0.0 {
        println!("{}", 2);
        println!("{}", (-b - temp.powf(0.5)) / (2.0f64 * a));
        println!("{}", (-b + temp.powf(0.5)) / (2.0f64 * a));
    } else if temp == 0.0 {
        println!("{}", 1);
        println!("{}", -b / (2.0f64 * a));
    } else {
        println!("{}", 0);
    }
}

fn main() {
    let mut abc = String::new();
    std::io::stdin().read_to_string(&mut abc).ok();
    let abc: Vec<f64> = abc.trim().split('\n').next().unwrap().trim().split_whitespace().map(|i| i.parse::<f64>().unwrap()).collect();
    solve(abc);
}