CF 530A(Quadratic equation-注意(-b+sqrt(Δ))/2a<(-b-sqrt(Δ))/2a的情况)[Picat]

A. Quadratic equation

time limit per test

2 seconds

memory limit per test

256 megabytes

input

standard input

output

standard output

You are given a quadratic equation with integer coefficients A * X2 + B * X + C = 0. It is guaranteed that A ≠ 0 and that the equation has at least one real root. Output the roots of the equation.

Input

The only line of input contains integers A, B and C ( - 1000 ≤ A, B, C ≤ 1000, A ≠ 0), separated by spaces.

Output

Output the roots of the equation in increasing order. If the equation has a single root of multiplicity 2, output it once. The root is considered to be correct if its absolute or relative error does not exceed 10 - 4.

Sample test(s)

input

1 -2 1

output

1

input

1 0 -1

output

-1 1

input

2 -3 1

output

0.5 1

简单的送分题。

BUG 请注意 

import math.

main =>
  A = read_real(),
  B = read_real(),
  C = read_real(),

  D = B*B-4*A*C,
  E := sqrt(D),
  F :=(-B+E)/(2.0*A),
  G :=(-B-E)/(2.0*A),

  if (F=G) then
	  printf("%f%n", F )
  else
  	  printf("%f %f%n", min(G,F), max(G,F) )
  end.