Trie树,又称字典树、单词查找树,是一种树形结构，用于保存大量的字符串。它的优点是：利用字符串的公共前缀来节约存储空间，是一种比较简单的数据结构。理解起来比较简单,但Trie树也有它的缺点,Trie树的内存消耗非常大。-Trie tree, also known as a dictionary tree, word search tree is a tree structure used to save a lot of strings. Its advantages are: the use of a string of public prefix to save storage space, is a relatively simple data structures. Is relatively simple to understand them, but the Trie tree also has its shortcomings, Trie tree is very big memory consumption.