a, b = map(int, input().split())
if a > b:
    a, b = b, a
ans = a + b
for a2b in range(a + 1):
    a2a = a - a2b
    b2b = b - a2b
    b2a = a - a2a
    ans = min(ans, abs(a2a + b2b - a2b - b2a))
print(ans)