def BinarySearch(yes, no):
    while abs(yes - no) != 1:
        mid = (yes + no)//2
        if mid ** 2 > 4 * (a ** 2 + b ** 2):
            yes = mid
        else:
            no = mid
    return yes

a, b = map(int, input().split())
print(BinarySearch(10 ** 9, -1))