x,y = input().split()

Gx, Gy = int(x),int(y)

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

if (Gx + Gy) % 2 != 0:
    bishop_moves = float('inf')
else:
    if Gx == Gy or Gx == -Gy:
        bishop_moves = 1
    else:
        bishop_moves = 2

print(min(rook_moves, bishop_moves))