{ "data": { "question": { "questionId": "211", "questionFrontendId": "211", "categoryTitle": "Algorithms", "boundTopicId": 1749, "title": "Design Add and Search Words Data Structure", "titleSlug": "design-add-and-search-words-data-structure", "content": "

Design a data structure that supports adding new words and finding if a string matches any previously added string.

\n\n

Implement the WordDictionary class:

\n\n\n\n

 

\n

Example:

\n\n
\nInput\n["WordDictionary","addWord","addWord","addWord","search","search","search","search"]\n[[],["bad"],["dad"],["mad"],["pad"],["bad"],[".ad"],["b.."]]\nOutput\n[null,null,null,null,false,true,true,true]\n\nExplanation\nWordDictionary wordDictionary = new WordDictionary();\nwordDictionary.addWord("bad");\nwordDictionary.addWord("dad");\nwordDictionary.addWord("mad");\nwordDictionary.search("pad"); // return False\nwordDictionary.search("bad"); // return True\nwordDictionary.search(".ad"); // return True\nwordDictionary.search("b.."); // return True\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "添加与搜索单词 - 数据结构设计", "translatedContent": "

请你设计一个数据结构，支持 添加新单词 和 查找字符串是否与任何先前添加的字符串匹配 。

\n\n

实现词典类 WordDictionary ：

\n\n\n\n

 

\n\n

示例：

\n\n
\n输入：\n[\"WordDictionary\",\"addWord\",\"addWord\",\"addWord\",\"search\",\"search\",\"search\",\"search\"]\n[[],[\"bad\"],[\"dad\"],[\"mad\"],[\"pad\"],[\"bad\"],[\".ad\"],[\"b..\"]]\n输出：\n[null,null,null,null,false,true,true,true]\n\n解释：\nWordDictionary wordDictionary = new WordDictionary();\nwordDictionary.addWord(\"bad\");\nwordDictionary.addWord(\"dad\");\nwordDictionary.addWord(\"mad\");\nwordDictionary.search(\"pad\"); // 返回 False\nwordDictionary.search(\"bad\"); // 返回 True\nwordDictionary.search(\".ad\"); // 返回 True\nwordDictionary.search(\"b..\"); // 返回 True\n
\n\n

 

\n\n

提示：

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\"vanillajs\": false, \"mysql\": false, \"mssql\": false, \"postgresql\": false, \"oraclesql\": false, \"pythondata\": false}", "topicTags": [ { "name": "Depth-First Search", "slug": "depth-first-search", "translatedName": "深度优先搜索", "__typename": "TopicTagNode" }, { "name": "Design", "slug": "design", "translatedName": "设计", "__typename": "TopicTagNode" }, { "name": "Trie", "slug": "trie", "translatedName": "字典树", "__typename": "TopicTagNode" }, { "name": "String", "slug": "string", "translatedName": "字符串", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": [ { "lang": "C++", "langSlug": "cpp", "code": "class WordDictionary {\npublic:\n WordDictionary() {\n \n }\n \n void addWord(string word) {\n \n }\n \n bool search(string word) {\n \n }\n};\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * WordDictionary* obj = new WordDictionary();\n * obj->addWord(word);\n * bool param_2 = obj->search(word);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Java", "langSlug": "java", "code": "class WordDictionary {\n\n public WordDictionary() {\n \n }\n \n public void addWord(String word) {\n \n }\n \n public boolean search(String word) {\n \n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * WordDictionary obj = new WordDictionary();\n * obj.addWord(word);\n * boolean param_2 = obj.search(word);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Python3", "langSlug": "python3", "code": "class WordDictionary:\n\n def __init__(self):\n \n\n def addWord(self, word: str) -> None:\n \n\n def search(self, word: str) -> bool:\n \n\n\n# Your WordDictionary object will be instantiated and called as such:\n# obj = WordDictionary()\n# obj.addWord(word)\n# param_2 = obj.search(word)", "__typename": "CodeSnippetNode" }, { "lang": "Python", "langSlug": "python", "code": "class WordDictionary(object):\n\n def __init__(self):\n \n\n def addWord(self, word):\n \"\"\"\n :type word: str\n :rtype: None\n \"\"\"\n \n\n def search(self, word):\n \"\"\"\n :type word: str\n :rtype: bool\n \"\"\"\n \n\n\n# Your WordDictionary object will be instantiated and called as such:\n# obj = WordDictionary()\n# obj.addWord(word)\n# param_2 = obj.search(word)", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "\nvar WordDictionary = function() {\n \n};\n\n/** \n * @param {string} word\n * @return {void}\n */\nWordDictionary.prototype.addWord = function(word) {\n \n};\n\n/** \n * @param {string} word\n * @return {boolean}\n */\nWordDictionary.prototype.search = function(word) {\n \n};\n\n/** \n * Your WordDictionary object will be instantiated and called as such:\n * var obj = new WordDictionary()\n * obj.addWord(word)\n * var param_2 = obj.search(word)\n */", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "class WordDictionary {\n constructor() {\n \n }\n\n addWord(word: string): void {\n \n }\n\n search(word: string): boolean {\n \n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * var obj = new WordDictionary()\n * obj.addWord(word)\n * var param_2 = obj.search(word)\n */", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class WordDictionary {\n\n public WordDictionary() {\n \n }\n \n public void AddWord(string word) {\n \n }\n \n public bool Search(string word) {\n \n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * WordDictionary obj = new WordDictionary();\n * obj.AddWord(word);\n * bool param_2 = obj.Search(word);\n */", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "\n\n\ntypedef struct {\n \n} WordDictionary;\n\n\nWordDictionary* wordDictionaryCreate() {\n \n}\n\nvoid wordDictionaryAddWord(WordDictionary* obj, char* word) {\n \n}\n\nbool wordDictionarySearch(WordDictionary* obj, char* word) {\n \n}\n\nvoid wordDictionaryFree(WordDictionary* obj) {\n \n}\n\n/**\n * Your WordDictionary struct will be instantiated and called as such:\n * WordDictionary* obj = wordDictionaryCreate();\n * wordDictionaryAddWord(obj, word);\n \n * bool param_2 = wordDictionarySearch(obj, word);\n \n * wordDictionaryFree(obj);\n*/", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "type WordDictionary struct {\n \n}\n\n\nfunc Constructor() WordDictionary {\n \n}\n\n\nfunc (this *WordDictionary) AddWord(word string) {\n \n}\n\n\nfunc (this *WordDictionary) Search(word string) bool {\n \n}\n\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * obj := Constructor();\n * obj.AddWord(word);\n * param_2 := obj.Search(word);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class WordDictionary() {\n\n fun addWord(word: String) {\n \n }\n\n fun search(word: String): Boolean {\n \n }\n\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * var obj = WordDictionary()\n * obj.addWord(word)\n * var param_2 = obj.search(word)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "\nclass WordDictionary {\n\n init() {\n \n }\n \n func addWord(_ word: String) {\n \n }\n \n func search(_ word: String) -> Bool {\n \n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * let obj = WordDictionary()\n * obj.addWord(word)\n * let ret_2: Bool = obj.search(word)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "struct WordDictionary {\n\n}\n\n\n/** \n * `&self` means the method takes an immutable reference.\n * If you need a mutable reference, change it to `&mut self` instead.\n */\nimpl WordDictionary {\n\n fn new() -> Self {\n \n }\n \n fn add_word(&self, word: String) {\n \n }\n \n fn search(&self, word: String) -> bool {\n \n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * let obj = WordDictionary::new();\n * obj.add_word(word);\n * let ret_2: bool = obj.search(word);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "class WordDictionary\n def initialize()\n \n end\n\n\n=begin\n :type word: String\n :rtype: Void\n=end\n def add_word(word)\n \n end\n\n\n=begin\n :type word: String\n :rtype: Boolean\n=end\n def search(word)\n \n end\n\n\nend\n\n# Your WordDictionary object will be instantiated and called as such:\n# obj = WordDictionary.new()\n# obj.add_word(word)\n# param_2 = obj.search(word)", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class WordDictionary {\n /**\n */\n function __construct() {\n \n }\n \n /**\n * @param String $word\n * @return NULL\n */\n function addWord($word) {\n \n }\n \n /**\n * @param String $word\n * @return Boolean\n */\n function search($word) {\n \n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * $obj = WordDictionary();\n * $obj->addWord($word);\n * $ret_2 = $obj->search($word);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Dart", "langSlug": "dart", "code": "class WordDictionary {\n\n WordDictionary() {\n \n }\n \n void addWord(String word) {\n \n }\n \n bool search(String word) {\n \n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * WordDictionary obj = WordDictionary();\n * obj.addWord(word);\n * bool param2 = obj.search(word);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "class WordDictionary() {\n\n def addWord(word: String): Unit = {\n \n }\n\n def search(word: String): Boolean = {\n \n }\n\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * val obj = new WordDictionary()\n * obj.addWord(word)\n * val param_2 = obj.search(word)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "defmodule WordDictionary do\n @spec init_() :: any\n def init_() do\n \n end\n\n @spec add_word(word :: String.t) :: any\n def add_word(word) do\n \n end\n\n @spec search(word :: String.t) :: boolean\n def search(word) do\n \n end\nend\n\n# Your functions will be called as such:\n# WordDictionary.init_()\n# WordDictionary.add_word(word)\n# param_2 = WordDictionary.search(word)\n\n# WordDictionary.init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "-spec word_dictionary_init_() -> any().\nword_dictionary_init_() ->\n .\n\n-spec word_dictionary_add_word(Word :: unicode:unicode_binary()) -> any().\nword_dictionary_add_word(Word) ->\n .\n\n-spec word_dictionary_search(Word :: unicode:unicode_binary()) -> boolean().\nword_dictionary_search(Word) ->\n .\n\n\n%% Your functions will be called as such:\n%% word_dictionary_init_(),\n%% word_dictionary_add_word(Word),\n%% Param_2 = word_dictionary_search(Word),\n\n%% word_dictionary_init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" }, { "lang": "Racket", "langSlug": "racket", "code": "(define word-dictionary%\n (class object%\n (super-new)\n \n (init-field)\n \n ; add-word : string? -> void?\n (define/public (add-word word)\n )\n ; search : string? -> boolean?\n (define/public (search word)\n )))\n\n;; Your word-dictionary% object will be instantiated and called as such:\n;; (define obj (new word-dictionary%))\n;; (send obj add-word word)\n;; (define param_2 (send obj search word))", "__typename": "CodeSnippetNode" }, { "lang": "Cangjie", "langSlug": "cangjie", "code": "class WordDictionary {\n init() {\n\n }\n \n func addWord(word: String): Unit {\n\n }\n \n func search(word: String): Bool {\n\n }\n}\n\n/**\n * Your WordDictionary object will be instantiated and called as such:\n * let obj: WordDictionary = WordDictionary()\n * obj.addWord(word)\n * let param_2 = obj.search(word)\n */", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"114.5K\", \"totalSubmission\": \"223.2K\", \"totalAcceptedRaw\": 114518, \"totalSubmissionRaw\": 223207, \"acRate\": \"51.3%\"}", "hints": [ "You should be familiar with how a Trie works. If not, please work on this problem: Implement Trie (Prefix Tree) first." ], "solution": null, "status": null, "sampleTestCase": "[\"WordDictionary\",\"addWord\",\"addWord\",\"addWord\",\"search\",\"search\",\"search\",\"search\"]\n[[],[\"bad\"],[\"dad\"],[\"mad\"],[\"pad\"],[\"bad\"],[\".ad\"],[\"b..\"]]", "metaData": "{\n \"classname\": \"WordDictionary\",\n \"constructor\": {\n \"params\": []\n },\n \"methods\": [\n {\n \"params\": [\n {\n \"type\": \"string\",\n \"name\": \"word\"\n }\n ],\n \"name\": \"addWord\",\n \"return\": {\n \"type\": \"void\"\n }\n },\n {\n \"params\": [\n {\n \"type\": \"string\",\n \"name\": \"word\"\n }\n ],\n \"name\": \"search\",\n \"return\": {\n \"type\": \"boolean\"\n }\n }\n ],\n \"return\": {\n \"type\": \"boolean\"\n },\n \"systemdesign\": true\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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