a,b=map(int,input().split())
a,b=max(a,b),min(a,b)
natural=2*b
un_natural=a-b
x=abs(natural-un_natural)
if natural<=un_natural:
    print(x)
else:
    if x%2==1:
        print(1)
    elif x%4==0:
        print(0)
    else:
        print(2)