def min_moves(Gx, Gy):
    # Rook logic
    if Gx == 0 and Gy == 0:
        rook = 0
    elif Gx == 0 or Gy == 0:
        rook = 1
    else:
        rook = 2

    # Bishop logic
    if (Gx + Gy) % 2 != 0:
        bishop = float('inf')  # Cannot reach
    elif Gx == Gy or Gx == -Gy:
        bishop = 1
    else:
        bishop = 2

    return min(rook, bishop)


# Input example
Gx, Gy = map(int, input().split())
print(min_moves(Gx, Gy))