package main

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

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

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

func say(x float64) {
	fmt.Printf("%.20f\n", x)
}

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
}