def minimum_moves(Gx, Gy):
    rook_moves = 0
    if Gx != 0:
        rook_moves += 1
    if Gy != 0:
        rook_moves += 1

    bishop_moves = 2 
    if abs(Gx) == abs(Gy) or (Gx + Gy) == 0:
        bishop_moves = 1
    
    if Gx == 0 and Gy == 0:
        bishop_moves = rook_moves = 0
    
    if rook_moves <= bishop_moves:
        return rook_moves
    else:
        return bishop_moves

Gx, Gy = map(int, input().split())
moves = minimum_moves(Gx, Gy)
print(moves)