package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
)

func main() {
	a := readFloat64()
	b := readFloat64()
	c := readFloat64()

	if a == 0 {
		fmt.Println("1")
		fmt.Println(-c / b)
	} else {
		d := b*b - 4*a*c
		if d > 0 {
			fmt.Println("2")
			fmt.Println((-b - math.Sqrt(d)) / (2 * a))
			fmt.Println((-b + math.Sqrt(d)) / (2 * a))
		} else if d == 0 {
			fmt.Println("1")
			fmt.Println(-b / (2 * a))
		} else {
			fmt.Println("0")
		}
	}
}

var stdin *bufio.Scanner

func read() string {
	if stdin == nil {
		stdin = bufio.NewScanner(os.Stdin)
		stdin.Split(bufio.ScanWords)
		stdin.Buffer(make([]byte, bufio.MaxScanTokenSize), int(math.MaxInt32))
	}
	stdin.Scan()
	return stdin.Text()
}

func readInt() int {
	n, _ := strconv.Atoi(read())
	return n
}

func readFloat64() float64 {
	n, _ := strconv.ParseFloat(read(), 64)
	return n
}