{ "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\nImplement the WordDictionary
class:
WordDictionary()
Initializes the object.void addWord(word)
Adds word
to the data structure, it can be matched later.bool search(word)
Returns true
if there is any string in the data structure that matches word
or false
otherwise. word
may contain dots '.'
where dots can be matched with any letter.\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\n1 <= word.length <= 25
word
in addWord
consists of lowercase English letters.word
in search
consist of '.'
or lowercase English letters.2
dots in word
for search
queries.104
calls will be made to addWord
and search
.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
:
WordDictionary()
初始化词典对象void addWord(word)
将 word
添加到数据结构中,之后可以对它进行匹配bool search(word)
如果数据结构中存在字符串与 word
匹配,则返回 true
;否则,返回 false
。word
中可能包含一些 '.'
,每个 .
都可以表示任何一个字母。\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:
\n\n1 <= word.length <= 25
addWord
中的 word
由小写英文字母组成search
中的 word
由 '.' 或小写英文字母组成104
次 addWord
和 search
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Python 2.7.12<\\/code><\\/p>\\r\\n\\r\\n
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