Spelling Bee

DropBox 2020 OA 准备时看到的题。题目如下：

https://leetcode.com/discuss/interview-question/354523/dropbox-oa-2019-spelling-bee

标签：354523,question,OA,bee,2019,Spelling,Bee,spelling
来源： https://www.cnblogs.com/hankunyan/p/11372179.html