URI Online Judge | 1036

Bhaskara's Formula

Adapted by Neilor Tonin, URI Brazil

Timelimit: 1

Read 3 floating-point numbers. After, print the roots of bhaskara’s formula. If it's impossible to calculate the roots because a division by zero or a square root of a negative number, presents the message “Impossivel calcular”.

Input

Read 3 floating-point numbers A, B and C.

Output

Print the result with 5 digits after the decimal point or the message if it is impossible to calculate.

Input Samples Output Samples

10.0 20.1 5.1

R1 = -0.29788
R2 = -1.71212

0.0 20.0 5.0

Impossivel calcular

10.3 203.0 5.0

R1 = -0.02466
R2 = -19.68408

10.0 3.0 5.0

Impossivel calcular