import sys, math
input = lambda: sys.stdin.readline()[:-1]
def MI(): return map(int, input().split())
inf = 10**18

a,b = MI()
if a>b:
    a,b = b,a

ans = inf
for i in range(a+1):
    for j in range(a+1):
        ans = min(ans, abs(i+j - ((b-i)+(a-j))))
print(ans)