摘要: Question: Given a binary tree, return the preorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, 1 \ 2 / 3 return [1,2,3]. 阅读全文
posted @ 2016-03-01 21:04 江湖小妞 阅读(174) 评论(0) 推荐(0) 编辑