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  1. package main
  2.  
  3. import (
  4. 	"math"
  5. 	"fmt"
  6. 	"bytes"
  7. 	"os"
  8. 	"io/ioutil"
  9. )
  10.  
  11. func main() {
  12. 	bs, _ := ioutil.ReadAll(os.Stdin)
  13. 	reader := bytes.NewBuffer(bs)
  14. 	var a, b, c int64
  15. 	fmt.Fscanf(reader, "%d %d %d", &a, &b, &c)
  16. 	delta := b * b - 4 * a * c
  17. 	if a == 0 && b == 0 && c == 0 {
  18. 		fmt.Printf("-1")
  19. 	} else if a == 0 && b == 0 {
  20. 		fmt.Printf("0")
  21. 	} else if a == 0 {
  22. 		fmt.Printf("1\n%f", float64(-c)/float64(b))
  23. 	} else if delta < 0 {
  24. 		fmt.Printf("0")
  25. 	} else if delta == 0 {
  26. 		fmt.Printf("1\n%f", float64(-b)/float64(2 * a))
  27. 	} else if delta > 0 {
  28. 		x1 := (float64(-b) + math.Sqrt(float64(delta))) / float64(2 * a)
  29. 		x2 := (float64(-b) - math.Sqrt(float64(delta))) / float64(2 * a)
  30. 		if x1 < x2 {
  31. 			fmt.Printf("2\n%f\n%f", x1, x2)
  32. 		} else {
  33. 			fmt.Printf("2\n%f\n%f", x2, x1)
  34. 		}
  35. 	}
  36. }
Success #stdin #stdout 0s 5292KB
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2
0.438447
4.561553
https://ideone.com/zK0Rfz
Quadratic Equation - codeforces
language:
Go (go 1.12.1)
created:
1 year ago
visibility:
secret

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