#!/usr/bin/env python3
from math import sqrt


a, b, c = input("enter a, b, c: ").split()

if a == 0: a = 1
else: a = int(a)

if b == 0: b = 1
else: b = int(b)

if c == 0: c = 1
else: c = int(c)

D = (b**2 - 4 * a * c)
print("D:", D)
if D > 0:
    D = sqrt(D)
    if not D.is_integer():
       D = D
else:
    print("корней нет!")
    exit(0)

print("sqrt(D):", D)

x1 = (-b - D) / (2 * a)
x2 = (-b + D) / (2 * a)
print("x1 = " + str(x1))
print("x2 = " + str(x2))