用Python解决数据结构与算法问题
https://facert.gitbooks.io/python-data-structure-cn/2.%E7%AE%97%E6%B3%95%E5%88%86%E6%9E%90/2.2.%E4%BB%80%E4%B9%88%E6%98%AF%E7%AE%97%E6%B3%95%E5%88%86%E6%9E%90/
https://facert.gitbooks.io/python-data-structure-cn/2.%E7%AE%97%E6%B3%95%E5%88%86%E6%9E%90/2.2.%E4%BB%80%E4%B9%88%E6%98%AF%E7%AE%97%E6%B3%95%E5%88%86%E6%9E%90/
