摘要: Easy Given an n-ary tree, return the preorder traversal of its nodes' values. For example, given a 3-ary tree: Return its preorder traversal as: [1,3, 阅读全文
posted @ 2019-09-06 17:25 程嘿嘿 阅读(119) 评论(0) 推荐(0) 编辑