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

# Rook moves
if Gx == 0 or Gy == 0:
    rook = 1
else:
    rook = 2

# Bishop moves
if (Gx + Gy) % 2 != 0:
    bishop = float('inf')  # Unreachable
elif Gx == Gy or Gx == -Gy:
    bishop = 1
else:
    bishop = 2

print(min(rook, bishop))