[1268] 搜索推荐系统
- GitHub
- http://leetcode.xuezhisd.top/post/f3f7f038.html
- https://leetcode.com/problems/search-suggestions-system
- https://leetcode-cn.com/problems/search-suggestions-system
题目描述
给你一个产品数组 products
和一个字符串 searchWord
,products
数组中每个产品都是一个字符串。
请你设计一个推荐系统,在依次输入单词 searchWord
的每一个字母后,推荐 products
数组中前缀与 searchWord
相同的最多三个产品。如果前缀相同的可推荐产品超过三个,请按字典序返回最小的三个。
请你以二维列表的形式,返回在输入 searchWord
每个字母后相应的推荐产品的列表。
示例 1:
输入:products = ["mobile","mouse","moneypot","monitor","mousepad"], searchWord = "mouse" 输出:[ ["mobile","moneypot","monitor"], ["mobile","moneypot","monitor"], ["mouse","mousepad"], ["mouse","mousepad"], ["mouse","mousepad"] ] 解释:按字典序排序后的产品列表是 ["mobile","moneypot","monitor","mouse","mousepad"] 输入 m 和 mo,由于所有产品的前缀都相同,所以系统返回字典序最小的三个产品 ["mobile","moneypot","monitor"] 输入 mou, mous 和 mouse 后系统都返回 ["mouse","mousepad"]
示例 2:
输入:products = ["havana"], searchWord = "havana" 输出:[["havana"],["havana"],["havana"],["havana"],["havana"],["havana"]]
示例 3:
输入:products = ["bags","baggage","banner","box","cloths"], searchWord = "bags" 输出:[["baggage","bags","banner"],["baggage","bags","banner"],["baggage","bags"],["bags"]]
示例 4:
输入:products = ["havana"], searchWord = "tatiana" 输出:[[],[],[],[],[],[],[]]
提示:
1 <= products.length <= 1000
1 <= Σ products[i].length <= 2 * 10^4
products[i]
中所有的字符都是小写英文字母。1 <= searchWord.length <= 1000
searchWord
中所有字符都是小写英文字母。
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