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

if Gx == 0 or Gy == 0:
    print(1)  # Rook 1手
elif abs(Gx) == abs(Gy):
    print(1)  # Bishop 1手
elif (Gx + Gy) % 2 == 0:
    print(2)  # Bishop 2手で可能
else:
    print(2)  # Rook 2手が最小