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字典树,是一种空间换时间的数据结构,又称Trie树、前缀树,是一种树形结构(字典树是一种数据结构),典型用于统计、排序、和保存大量字符串 一个字典树的应用场景:在搜索框输入部分单词下面会有一些关联的搜索内容。 !
前缀树的三个性质: