[<img src="https://static.leetcode-cn.com/cn-mono-assets/production/assets/logo-dark-cn.c42314a8.svg" height="20" /> https://leetcode-cn.com/problems/implement-trie ...

实现 `Trie` 数，即前缀树。`trie`的发明者 Edward Fredkin 把它读作 `/ˈtriː/ "tree"`。但是，其他作者把它读作`/traɪ/"try ...