str_a, str_b, str_c = input().split()
a = eval(str_a)
b = eval(str_b)
c = eval(str_c)
print(b * b - 4 * a * c)

486ad4a50171fc19635d2cf073740d6f3879dbb7
<mask token>

<mask token>
print(b * b - 4 * a * c)

str_a, str_b, str_c = input().split()
a = eval(str_a)
b = eval(str_b)
c = eval(str_c)
print(b * b - 4 * a * c)
