import sys

def min_moves_to_goal(Gx: int, Gy: int) -> int:
    # Rook moves
    if Gx == 0 and Gy == 0:
        rook = 0
    elif Gx == 0 or Gy == 0:
        rook = 1
    else:
        rook = 2

    # Bishop moves
    if Gx == 0 and Gy == 0:
        bishop = 0
    elif Gx == Gy or Gx == -Gy:
        bishop = 1
    else:
        bishop = 2

    return min(rook, bishop)


def main():
    data = sys.stdin.read().split()
    if len(data) < 2:
        return
    Gx, Gy = map(int, data)
    print(min_moves_to_goal(Gx, Gy))


if __name__ == "__main__":
    main()