# -*- coding:utf-8 -*-
# 汉诺塔回溯递归实现
# 假设参数中初始杆为a，借助杆为c，阶段终止杆为b
# 第一步，a状态借助b移动到c
# 第二步，a移动到b
# 第三步，c借助a移动到b
class Solution:
  def hanoi(self, n, a, b, c):
    global lishan
    if n > 0:
      Solution.hanoi(self, n-1, a, c, b)
      b.append(lishan[n-1])
      a.remove(lishan[n-1])
      Solution.hanoi(self, n-1, c, b, a)
so = Solution()
n = 3
global lishan
lishan = [x for x in xrange(n)]
A = [x for x in xrange(n)]
B = []
C = []
so.hanoi(3, A, B, C)print B

[2, 1, 0]