import math

x = float(input())
y = float(input())

r = math.sqrt(math.pow(x, 2) + math.pow(y, 2))
theta = math.atan2(y, x)

beta = (math.pi / 2) + (math.pi / 20) - theta

while beta < 0:
    beta += 2 * math.pi

for i in range(0, 21):
    if beta <= ((i * math.pi) / 10):
        section = i
        break

points = 0
if r <= 6.35:
    points = 50
elif r <= 15.9:
    points = 25
elif r <= 97.4:
    points = section
elif r <= 107:
    points = section * 3
elif r <= 160.4:
    points = section
elif r <= 170:
    points = section * 2

print(points)