A, B = map(int, input().split())
if A < B:
    A, B = B, A

ansl = []
for i in range(0, B + 1):
    shizen = i
    fushizen = A - i
    fushizen += B - i
    shizen += i
    ans = abs(shizen - fushizen)
    ansl.append(ans)
print(min(ansl))