Gx, Gy = map(int, input().split())

if Gx == 0 and Gy == 0:
    rook_moves = 0
elif Gx == 0 or Gy == 0:
    rook_moves = 1
else:
    rook_moves = 2

if Gx == 0 and Gy == 0:
    bishop_moves = 0
elif abs(Gx) == abs(Gy):
    bishop_moves = 1
else:
    bishop_moves = 2

result = min(rook_moves, bishop_moves)
print(result)