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        "question": {
            "questionId": "746",
            "questionFrontendId": "745",
            "categoryTitle": "Algorithms",
            "boundTopicId": 1246,
            "title": "Prefix and Suffix Search",
            "titleSlug": "prefix-and-suffix-search",
            "content": "<p>Design a special dictionary with some words that searchs the words in it by a prefix and a suffix.</p>\n\n<p>Implement the <code>WordFilter</code> class:</p>\n\n<ul>\n\t<li><code>WordFilter(string[] words)</code> Initializes the object with the <code>words</code> in the dictionary.</li>\n\t<li><code>f(string prefix, string suffix)</code> Returns <em>the index of the word in the dictionary,</em> which has the prefix <code>prefix</code> and the suffix <code>suffix</code>. If there is more than one valid index, return <strong>the largest</strong> of them. If there is no such word in the dictionary, return <code>-1</code>.</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n[&quot;WordFilter&quot;, &quot;f&quot;]\n[[[&quot;apple&quot;]], [&quot;a&quot;, &quot;e&quot;]]\n<strong>Output</strong>\n[null, 0]\n\n<strong>Explanation</strong>\nWordFilter wordFilter = new WordFilter([&quot;apple&quot;]);\nwordFilter.f(&quot;a&quot;, &quot;e&quot;); // return 0, because the word at index 0 has prefix = &quot;a&quot; and suffix = &#39;e&quot;.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= words.length &lt;= 15000</code></li>\n\t<li><code>1 &lt;= words[i].length &lt;= 10</code></li>\n\t<li><code>1 &lt;= prefix.length, suffix.length &lt;= 10</code></li>\n\t<li><code>words[i]</code>, <code>prefix</code> and <code>suffix</code> consist of lower-case English letters only.</li>\n\t<li>At most <code>15000</code> calls will be made to the function <code>f</code>.</li>\n</ul>\n",
            "translatedTitle": "前缀和后缀搜索",
            "translatedContent": "<p>设计一个包含一些单词的特殊词典，并能够通过前缀和后缀来检索单词。</p>\n\n<p>实现 <code>WordFilter</code> 类：</p>\n\n<ul>\n\t<li><code>WordFilter(string[] words)</code> 使用词典中的单词 <code>words</code> 初始化对象。</li>\n\t<li><code>f(string prefix, string suffix)</code> 返回词典中具有前缀 <code>prefix</code> 和后缀<code>suffix</code> 的单词的下标。如果存在不止一个满足要求的下标，返回其中 <strong>最大的下标</strong> 。如果不存在这样的单词，返回 <code>-1</code> 。</li>\n</ul>\n\n<p> </p>\n\n<p><strong>示例</strong></p>\n\n<pre>\n<strong>输入：</strong>\n[\"WordFilter\", \"f\"]\n[[[\"apple\"]], [\"a\", \"e\"]]\n<strong>输出：</strong>\n[null, 0]\n\n<strong>解释：</strong>\nWordFilter wordFilter = new WordFilter([\"apple\"]);\nwordFilter.f(\"a\", \"e\"); // 返回 0 ，因为下标为 0 的单词的 prefix = \"a\" 且 suffix = 'e\" 。\n</pre>\n \n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 <= words.length <= 15000</code></li>\n\t<li><code>1 <= words[i].length <= 10</code></li>\n\t<li><code>1 <= prefix.length, suffix.length <= 10</code></li>\n\t<li><code>words[i]</code>、<code>prefix</code> 和 <code>suffix</code> 仅由小写英文字母组成</li>\n\t<li>最多对函数 <code>f</code> 进行 <code>15000</code> 次调用</li>\n</ul>\n",
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                    "lang": "C++",
                    "langSlug": "cpp",
                    "code": "class WordFilter {\npublic:\n    WordFilter(vector<string>& words) {\n\n    }\n    \n    int f(string prefix, string suffix) {\n\n    }\n};\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * WordFilter* obj = new WordFilter(words);\n * int param_1 = obj->f(prefix,suffix);\n */",
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                },
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                    "lang": "Java",
                    "langSlug": "java",
                    "code": "class WordFilter {\n\n    public WordFilter(String[] words) {\n\n    }\n    \n    public int f(String prefix, String suffix) {\n\n    }\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * WordFilter obj = new WordFilter(words);\n * int param_1 = obj.f(prefix,suffix);\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Python",
                    "langSlug": "python",
                    "code": "class WordFilter(object):\n\n    def __init__(self, words):\n        \"\"\"\n        :type words: List[str]\n        \"\"\"\n\n\n    def f(self, prefix, suffix):\n        \"\"\"\n        :type prefix: str\n        :type suffix: str\n        :rtype: int\n        \"\"\"\n\n\n\n# Your WordFilter object will be instantiated and called as such:\n# obj = WordFilter(words)\n# param_1 = obj.f(prefix,suffix)",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Python3",
                    "langSlug": "python3",
                    "code": "class WordFilter:\n\n    def __init__(self, words: List[str]):\n\n\n    def f(self, prefix: str, suffix: str) -> int:\n\n\n\n# Your WordFilter object will be instantiated and called as such:\n# obj = WordFilter(words)\n# param_1 = obj.f(prefix,suffix)",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "C",
                    "langSlug": "c",
                    "code": "\n\n\ntypedef struct {\n    \n} WordFilter;\n\n\nWordFilter* wordFilterCreate(char ** words, int wordsSize) {\n    \n}\n\nint wordFilterF(WordFilter* obj, char * prefix, char * suffix) {\n  \n}\n\nvoid wordFilterFree(WordFilter* obj) {\n    \n}\n\n/**\n * Your WordFilter struct will be instantiated and called as such:\n * WordFilter* obj = wordFilterCreate(words, wordsSize);\n * int param_1 = wordFilterF(obj, prefix, suffix);\n \n * wordFilterFree(obj);\n*/",
                    "__typename": "CodeSnippetNode"
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                    "lang": "C#",
                    "langSlug": "csharp",
                    "code": "public class WordFilter {\n\n    public WordFilter(string[] words) {\n\n    }\n    \n    public int F(string prefix, string suffix) {\n\n    }\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * WordFilter obj = new WordFilter(words);\n * int param_1 = obj.F(prefix,suffix);\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "/**\n * @param {string[]} words\n */\nvar WordFilter = function(words) {\n\n};\n\n/** \n * @param {string} prefix \n * @param {string} suffix\n * @return {number}\n */\nWordFilter.prototype.f = function(prefix, suffix) {\n\n};\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * var obj = new WordFilter(words)\n * var param_1 = obj.f(prefix,suffix)\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Ruby",
                    "langSlug": "ruby",
                    "code": "class WordFilter\n\n=begin\n    :type words: String[]\n=end\n    def initialize(words)\n\n    end\n\n\n=begin\n    :type prefix: String\n    :type suffix: String\n    :rtype: Integer\n=end\n    def f(prefix, suffix)\n\n    end\n\n\nend\n\n# Your WordFilter object will be instantiated and called as such:\n# obj = WordFilter.new(words)\n# param_1 = obj.f(prefix, suffix)",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Swift",
                    "langSlug": "swift",
                    "code": "\nclass WordFilter {\n\n    init(_ words: [String]) {\n\n    }\n    \n    func f(_ prefix: String, _ suffix: String) -> Int {\n\n    }\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * let obj = WordFilter(words)\n * let ret_1: Int = obj.f(prefix, suffix)\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Go",
                    "langSlug": "golang",
                    "code": "type WordFilter struct {\n\n}\n\n\nfunc Constructor(words []string) WordFilter {\n\n}\n\n\nfunc (this *WordFilter) F(prefix string, suffix string) int {\n\n}\n\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * obj := Constructor(words);\n * param_1 := obj.F(prefix,suffix);\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Scala",
                    "langSlug": "scala",
                    "code": "class WordFilter(_words: Array[String]) {\n\n    def f(prefix: String, suffix: String): Int = {\n\n    }\n\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * var obj = new WordFilter(words)\n * var param_1 = obj.f(prefix,suffix)\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Kotlin",
                    "langSlug": "kotlin",
                    "code": "class WordFilter(words: Array<String>) {\n\n    fun f(prefix: String, suffix: String): Int {\n\n    }\n\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * var obj = WordFilter(words)\n * var param_1 = obj.f(prefix,suffix)\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Rust",
                    "langSlug": "rust",
                    "code": "struct WordFilter {\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 WordFilter {\n\n    fn new(words: Vec<String>) -> Self {\n\n    }\n    \n    fn f(&self, prefix: String, suffix: String) -> i32 {\n\n    }\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * let obj = WordFilter::new(words);\n * let ret_1: i32 = obj.f(prefix, suffix);\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "PHP",
                    "langSlug": "php",
                    "code": "class WordFilter {\n    /**\n     * @param String[] $words\n     */\n    function __construct($words) {\n\n    }\n\n    /**\n     * @param String $prefix\n     * @param String $suffix\n     * @return Integer\n     */\n    function f($prefix, $suffix) {\n\n    }\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * $obj = WordFilter($words);\n * $ret_1 = $obj->f($prefix, $suffix);\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "TypeScript",
                    "langSlug": "typescript",
                    "code": "class WordFilter {\n    constructor(words: string[]) {\n\n    }\n\n    f(prefix: string, suffix: string): number {\n\n    }\n}\n\n/**\n * Your WordFilter object will be instantiated and called as such:\n * var obj = new WordFilter(words)\n * var param_1 = obj.f(prefix,suffix)\n */",
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                    "lang": "Racket",
                    "langSlug": "racket",
                    "code": "(define word-filter%\n  (class object%\n    (super-new)\n\n    ; words : (listof string?)\n    (init-field\n      words)\n    \n    ; f : string? string? -> exact-integer?\n    (define/public (f prefix suffix)\n\n      )))\n\n;; Your word-filter% object will be instantiated and called as such:\n;; (define obj (new word-filter% [words words]))\n;; (define param_1 (send obj f prefix suffix))",
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                    "lang": "Erlang",
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                    "code": "-spec word_filter_init_(Words :: [unicode:unicode_binary()]) -> any().\nword_filter_init_(Words) ->\n  .\n\n-spec word_filter_f(Prefix :: unicode:unicode_binary(), Suffix :: unicode:unicode_binary()) -> integer().\nword_filter_f(Prefix, Suffix) ->\n  .\n\n\n%% Your functions will be called as such:\n%% word_filter_init_(Words),\n%% Param_1 = word_filter_f(Prefix, Suffix),\n\n%% word_filter_init_ will be called before every test case, in which you can do some necessary initializations.",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Elixir",
                    "langSlug": "elixir",
                    "code": "defmodule WordFilter do\n  @spec init_(words :: [String.t]) :: any\n  def init_(words) do\n\n  end\n\n  @spec f(prefix :: String.t, suffix :: String.t) :: integer\n  def f(prefix, suffix) do\n\n  end\nend\n\n# Your functions will be called as such:\n# WordFilter.init_(words)\n# param_1 = WordFilter.f(prefix, suffix)\n\n# WordFilter.init_ will be called before every test case, in which you can do some necessary initializations.",
                    "__typename": "CodeSnippetNode"
                }
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            "hints": [
                "For a word like \"test\", consider \"#test\", \"t#test\", \"st#test\", \"est#test\", \"test#test\".  Then if we have a query like prefix = \"te\", suffix = \"t\", we can find it by searching for something we've inserted starting with \"t#te\"."
            ],
            "solution": null,
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            "sampleTestCase": "[\"WordFilter\",\"f\"]\n[[[\"apple\"]],[\"a\",\"e\"]]",
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href=\\\"https:\\/\\/github.com\\/datastructures-js\\/queue\\\" target=\\\"_blank\\\"> datastructures-js\\/queue<\\/a>\\u3002<\\/p>\"],\"ruby\":[\"Ruby\",\"<p>\\u4f7f\\u7528<code>Ruby 3.1<\\/code>\\u6267\\u884c<\\/p>\\r\\n\\r\\n<p>\\u4e00\\u4e9b\\u5e38\\u7528\\u7684\\u6570\\u636e\\u7ed3\\u6784\\u5df2\\u5728 Algorithms \\u6a21\\u5757\\u4e2d\\u63d0\\u4f9b\\uff1ahttps:\\/\\/www.rubydoc.info\\/github\\/kanwei\\/algorithms\\/Algorithms<\\/p>\"],\"swift\":[\"Swift\",\"<p>\\u7248\\u672c\\uff1a<code>Swift 5.5.2<\\/code><\\/p>\\r\\n\\r\\n<p>\\u6211\\u4eec\\u901a\\u5e38\\u4fdd\\u8bc1\\u66f4\\u65b0\\u5230 <a href=\\\"https:\\/\\/swift.org\\/download\\/\\\" target=\\\"_blank\\\">Apple\\u653e\\u51fa\\u7684\\u6700\\u65b0\\u7248Swift<\\/a>\\u3002\\u5982\\u679c\\u60a8\\u53d1\\u73b0Swift\\u4e0d\\u662f\\u6700\\u65b0\\u7248\\u7684\\uff0c\\u8bf7\\u8054\\u7cfb\\u6211\\u4eec\\uff01\\u6211\\u4eec\\u5c06\\u5c3d\\u5feb\\u66f4\\u65b0\\u3002<\\/p>\"],\"golang\":[\"Go\",\"<p>\\u7248\\u672c\\uff1a<code>Go 1.17<\\/code><\\/p>\\r\\n\\r\\n<p>\\u652f\\u6301 <a href=\\\"https:\\/\\/godoc.org\\/github.com\\/emirpasic\\/gods\\\" target=\\\"_blank\\\">https:\\/\\/godoc.org\\/github.com\\/emirpasic\\/gods<\\/a> \\u7b2c\\u4e09\\u65b9\\u5e93\\u3002<\\/p>\"],\"python3\":[\"Python3\",\"<p>\\u7248\\u672c\\uff1a<code>Python 3.10<\\/code><\\/p>\\r\\n\\r\\n<p>\\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982<a href=\\\"https:\\/\\/docs.python.org\\/3\\/library\\/array.html\\\" target=\\\"_blank\\\">array<\\/a>, <a href=\\\"https:\\/\\/docs.python.org\\/3\\/library\\/bisect.html\\\" target=\\\"_blank\\\">bisect<\\/a>, <a href=\\\"https:\\/\\/docs.python.org\\/3\\/library\\/collections.html\\\" target=\\\"_blank\\\">collections<\\/a>\\u3002 \\u5982\\u679c\\u60a8\\u9700\\u8981\\u4f7f\\u7528\\u5176\\u4ed6\\u5e93\\u51fd\\u6570\\uff0c\\u8bf7\\u81ea\\u884c\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n<p>\\u5982\\u9700\\u4f7f\\u7528 Map\\/TreeMap \\u6570\\u636e\\u7ed3\\u6784\\uff0c\\u60a8\\u53ef\\u4f7f\\u7528 <a href=\\\"http:\\/\\/www.grantjenks.com\\/docs\\/sortedcontainers\\/\\\" target=\\\"_blank\\\">sortedcontainers<\\/a> \\u5e93\\u3002<\\/p>\"],\"scala\":[\"Scala\",\"<p>\\u7248\\u672c\\uff1a<code>Scala 2.13<\\/code><\\/p>\"],\"kotlin\":[\"Kotlin\",\"<p>\\u7248\\u672c\\uff1a<code>Kotlin 1.3.10<\\/code><\\/p>\"],\"rust\":[\"Rust\",\"<p>\\u7248\\u672c\\uff1a<code>rust 1.58.1<\\/code><\\/p>\\r\\n\\r\\n<p>\\u652f\\u6301 crates.io \\u7684 <a href=\\\"https:\\/\\/crates.io\\/crates\\/rand\\\" target=\\\"_blank\\\">rand<\\/a><\\/p>\"],\"php\":[\"PHP\",\"<p><code>PHP 8.1<\\/code>.<\\/p>\\r\\n\\r\\n<p>With bcmath module.<\\/p>\"],\"typescript\":[\"TypeScript\",\"<p>TypeScript 4.5.4<\\/p>\\r\\n\\r\\n<p>Compile Options: --alwaysStrict --strictBindCallApply --strictFunctionTypes --target ES2020<\\/p>\"],\"racket\":[\"Racket\",\"<p><a href=\\\"https:\\/\\/docs.racket-lang.org\\/guide\\/performance.html#%28tech._c%29\\\" target=\\\"_blank\\\">Racket CS<\\/a> v8.3<\\/p>\\r\\n\\r\\n<p>\\u4f7f\\u7528 #lang racket<\\/p>\\r\\n\\r\\n<p>\\u5df2\\u9884\\u5148 (require data\\/gvector data\\/queue data\\/order data\\/heap). \\u82e5\\u9700\\u4f7f\\u7528\\u5176\\u5b83\\u6570\\u636e\\u7ed3\\u6784\\uff0c\\u53ef\\u81ea\\u884c require\\u3002<\\/p>\"],\"erlang\":[\"Erlang\",\"Erlang\\/OTP 24.2\"],\"elixir\":[\"Elixir\",\"Elixir 1.13.0 with Erlang\\/OTP 24.2\"]}",
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