cb, bb = input("").split()
cb = int(cb)
bb = int(bb)

cp = bb 
bp = cb

place_cb = min(cb, cp)
place_bb = min(bb, bp)

natural = place_cb + place_bb
unnatural = cb - place_cb if place_cb > place_bb else bb - place_bb

if cb == bb:
    print(0)

else:
    print(abs(natural - unnatural))