import math

xp, yp = [int(x) for x in input().split()]

res = 0
r2 = xp * xp + yp * yp
r_can = int(math.floor(math.sqrt(r2)))
for r in range(r_can, 2 * 10**4):
    if r * r > r2:
        res = 2 * r
        break

print(res)