def main():
    a,b = map(int,input().split())
    n = a+b
    unnatural = abs(a-b)
    natural = n - unnatural
    mn = abs(natural - unnatural)
    for i in range(min(a,b)):
        unnatural += 2
        natural -= 2
        mn = min(mn,abs(natural - unnatural))
    print(mn)



if __name__ == '__main__':
    main()