def solver(a,b,c):
    D = b**2 - 4*a*c
    if D == 0:
        x = (-b + D**0.5) / (2*a)
        return x
    elif D > 0:
        x1 =  (-b + D**0.5) / (2*a)
        x2 =  (-b - D**0.5) / (2*a)
        return x1, x2
    elif D < 0:
        return "Корней нет"
a, b, c = float(input('a = ')), float(input('b = ')), float(input('c = '))
print(solver(a, b, c))