import sys


def main():
    sys.setrecursionlimit(1000000)
    input = lambda: sys.stdin.readline()[:-1]
    A, B = map(int, input().split())

    ans = float("inf")
    for i in range(1, min(A, B) + 1):
        good = i * 2
        bad = A + B - good
        ans = min(ans, abs(good - bad))
    print(ans)


if not __debug__:
    f = open(sys.argv[1], "r")
    sys.stdin = f

main()