A, B = map(int, input().split())

d = 100

if A >= B:
    for i in range(1, B+1):
        for j in range(1, B+1):
            if abs((i + j) - ((A-i) + (B-j))) < d:
                d = abs((i + j) - ((A-i) + (B-j)))
else:
    for i in range(1, A+1):
        for j in range(1, A+1):
            if abs((i + j) - ((A-i) + (B-j))) < d:
                d = abs((i + j) - ((A-i) + (B-j)))

print(d)