Masala D

Xotira 16 MB Vaqt 1000 ms
14

Simmetriya

y=ax2x^2+bx+c parabolaning simmetriya o'qini toping.


Kiruvchi ma'lumotlar:

a, b, c (0 <= a, b, c <= 10310^3)


Chiquvchi ma'lumotlar:

Masalaning javobi


Misollar
# input.txt output.txt
1
2 -1 -3
0.25
2
4 3 2
-0.375
Izoh:

.