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

ans = 100000
x = min(a, b)
y = max(a, b)

for i in range(x+1):
    m = max(y-i, i)
    n = min(y-i, i)
    for j in range(n, m+1):
        ans = min(ans, abs(2*(i+j)-(x+y)))


print(ans)