import math

a, b = map(int, input().split())

r = math.sqrt(a) + math.sqrt(b)
res = math.ceil(r)

# try res - 1
# a + b + math.sqrt(a * b) = res
while ((res - 1) ** 2 - a - b) ** 2 > 4 * a * b:
	res -= 1

print(res)