"content":"<p>Design an algorithm that accepts a stream of characters and checks if a suffix of these characters is a string of a given array of strings <code>words</code>.</p>\n\n<p>For example, if <code>words = ["abc", "xyz"]</code> and the stream added the four characters (one by one) <code>'a'</code>, <code>'x'</code>, <code>'y'</code>, and <code>'z'</code>, your algorithm should detect that the suffix <code>"xyz"</code> of the characters <code>"axyz"</code> matches <code>"xyz"</code> from <code>words</code>.</p>\n\n<p>Implement the <code>StreamChecker</code> class:</p>\n\n<ul>\n\t<li><code>StreamChecker(String[] words)</code> Initializes the object with the strings array <code>words</code>.</li>\n\t<li><code>boolean query(char letter)</code> Accepts a new character from the stream and returns <code>true</code> if any non-empty suffix from the stream forms a word that is in <code>words</code>.</li>\n</ul>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n["StreamChecker", "query", "query", "query", "query", "query", "query", "query", "query", "query", "query", "query", "query"]\n[[["cd", "f", "kl"]], ["a"], ["b"], ["c"], ["d"], ["e"], ["f"], ["g"], ["h"], ["i"], ["j"], ["k"], ["l"]]\n<strong>Output</strong>\n[null, false, false, false, true, false, true, false, false, false, false, false, true]\n\n<strong>Explanation</strong>\nStreamChecker streamChecker = new StreamChecker(["cd", "f", "kl"]);\nstreamChecker.query("a"); // return False\nstreamChecker.query("b"); // return False\nstreamChecker.query("c"); // return False\nstreamChecker.query("d"); // return True, because 'cd' is in the wordlist\nstreamChecker.query("e"); // return False\nstreamChecker.query("f"); // return True, because 'f' is in the wordlist\nstreamChecker.query("g"); // return False\nstreamChecker.query("h"); // return False\nstreamChecker.query("i"); // return False\nstreamChecker.query("j"); // return False\nstreamChecker.query("k"); // return False\nstreamChecker.query("l"); // return True, because 'kl' is in the wordlist\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= words.length <= 2000</code></li>\n\t<li><code>1 <= words[i].length <= 2000</code></li>\n\t<li><code>words[i]</code> consists of lowercase English letters.</li>\n\t<li><code>letter</code> is a lowercase English letter.</li>\n\t<li>At most <code>4 * 10<sup>4</sup></code> calls will be made to query.</li>\n</ul>\n",
"code":"class StreamChecker {\npublic:\n StreamChecker(vector<string>& words) {\n \n }\n \n bool query(char letter) {\n \n }\n};\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * StreamChecker* obj = new StreamChecker(words);\n * bool param_1 = obj->query(letter);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Java",
"langSlug":"java",
"code":"class StreamChecker {\n\n public StreamChecker(String[] words) {\n \n }\n \n public boolean query(char letter) {\n \n }\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * StreamChecker obj = new StreamChecker(words);\n * boolean param_1 = obj.query(letter);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python",
"langSlug":"python",
"code":"class StreamChecker(object):\n\n def __init__(self, words):\n \"\"\"\n :type words: List[str]\n \"\"\"\n \n\n def query(self, letter):\n \"\"\"\n :type letter: str\n :rtype: bool\n \"\"\"\n \n\n\n# Your StreamChecker object will be instantiated and called as such:\n# obj = StreamChecker(words)\n# param_1 = obj.query(letter)",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python3",
"langSlug":"python3",
"code":"class StreamChecker:\n\n def __init__(self, words: List[str]):\n \n\n def query(self, letter: str) -> bool:\n \n\n\n# Your StreamChecker object will be instantiated and called as such:\n# obj = StreamChecker(words)\n# param_1 = obj.query(letter)",
"__typename":"CodeSnippetNode"
},
{
"lang":"C",
"langSlug":"c",
"code":"\n\n\ntypedef struct {\n \n} StreamChecker;\n\n\nStreamChecker* streamCheckerCreate(char ** words, int wordsSize) {\n \n}\n\nbool streamCheckerQuery(StreamChecker* obj, char letter) {\n \n}\n\nvoid streamCheckerFree(StreamChecker* obj) {\n \n}\n\n/**\n * Your StreamChecker struct will be instantiated and called as such:\n * StreamChecker* obj = streamCheckerCreate(words, wordsSize);\n * bool param_1 = streamCheckerQuery(obj, letter);\n \n * streamCheckerFree(obj);\n*/",
"__typename":"CodeSnippetNode"
},
{
"lang":"C#",
"langSlug":"csharp",
"code":"public class StreamChecker {\n\n public StreamChecker(string[] words) {\n \n }\n \n public bool Query(char letter) {\n \n }\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * StreamChecker obj = new StreamChecker(words);\n * bool param_1 = obj.Query(letter);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"JavaScript",
"langSlug":"javascript",
"code":"/**\n * @param {string[]} words\n */\nvar StreamChecker = function(words) {\n \n};\n\n/** \n * @param {character} letter\n * @return {boolean}\n */\nStreamChecker.prototype.query = function(letter) {\n \n};\n\n/** \n * Your StreamChecker object will be instantiated and called as such:\n * var obj = new StreamChecker(words)\n * var param_1 = obj.query(letter)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Ruby",
"langSlug":"ruby",
"code":"class StreamChecker\n\n=begin\n :type words: String[]\n=end\n def initialize(words)\n \n end\n\n\n=begin\n :type letter: Character\n :rtype: Boolean\n=end\n def query(letter)\n \n end\n\n\nend\n\n# Your StreamChecker object will be instantiated and called as such:\n# obj = StreamChecker.new(words)\n# param_1 = obj.query(letter)",
"__typename":"CodeSnippetNode"
},
{
"lang":"Swift",
"langSlug":"swift",
"code":"\nclass StreamChecker {\n\n init(_ words: [String]) {\n \n }\n \n func query(_ letter: Character) -> Bool {\n \n }\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * let obj = StreamChecker(words)\n * let ret_1: Bool = obj.query(letter)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Go",
"langSlug":"golang",
"code":"type StreamChecker struct {\n \n}\n\n\nfunc Constructor(words []string) StreamChecker {\n \n}\n\n\nfunc (this *StreamChecker) Query(letter byte) bool {\n \n}\n\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * obj := Constructor(words);\n * param_1 := obj.Query(letter);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Scala",
"langSlug":"scala",
"code":"class StreamChecker(_words: Array[String]) {\n\n def query(letter: Char): Boolean = {\n \n }\n\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * var obj = new StreamChecker(words)\n * var param_1 = obj.query(letter)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Kotlin",
"langSlug":"kotlin",
"code":"class StreamChecker(words: Array<String>) {\n\n fun query(letter: Char): Boolean {\n \n }\n\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * var obj = StreamChecker(words)\n * var param_1 = obj.query(letter)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Rust",
"langSlug":"rust",
"code":"struct StreamChecker {\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 StreamChecker {\n\n fn new(words: Vec<String>) -> Self {\n \n }\n \n fn query(&self, letter: char) -> bool {\n \n }\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * let obj = StreamChecker::new(words);\n * let ret_1: bool = obj.query(letter);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"PHP",
"langSlug":"php",
"code":"class StreamChecker {\n /**\n * @param String[] $words\n */\n function __construct($words) {\n \n }\n \n /**\n * @param String $letter\n * @return Boolean\n */\n function query($letter) {\n \n }\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * $obj = StreamChecker($words);\n * $ret_1 = $obj->query($letter);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"TypeScript",
"langSlug":"typescript",
"code":"class StreamChecker {\n constructor(words: string[]) {\n\n }\n\n query(letter: string): boolean {\n\n }\n}\n\n/**\n * Your StreamChecker object will be instantiated and called as such:\n * var obj = new StreamChecker(words)\n * var param_1 = obj.query(letter)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Racket",
"langSlug":"racket",
"code":"(define stream-checker%\n (class object%\n (super-new)\n\n ; words : (listof string?)\n (init-field\n words)\n \n ; query : char? -> boolean?\n (define/public (query letter)\n\n )))\n\n;; Your stream-checker% object will be instantiated and called as such:\n;; (define obj (new stream-checker% [words words]))\n;; (define param_1 (send obj query letter))",
"__typename":"CodeSnippetNode"
},
{
"lang":"Erlang",
"langSlug":"erlang",
"code":"-spec stream_checker_init_(Words :: [unicode:unicode_binary()]) -> any().\nstream_checker_init_(Words) ->\n .\n\n-spec stream_checker_query(Letter :: char()) -> boolean().\nstream_checker_query(Letter) ->\n .\n\n\n%% Your functions will be called as such:\n%% stream_checker_init_(Words),\n%% Param_1 = stream_checker_query(Letter),\n\n%% stream_checker_init_ will be called before every test case, in which you can do some necessary initializations.",
"__typename":"CodeSnippetNode"
},
{
"lang":"Elixir",
"langSlug":"elixir",
"code":"defmodule StreamChecker do\n @spec init_(words :: [String.t]) :: any\n def init_(words) do\n\n end\n\n @spec query(letter :: char) :: boolean\n def query(letter) do\n\n end\nend\n\n# Your functions will be called as such:\n# StreamChecker.init_(words)\n# param_1 = StreamChecker.query(letter)\n\n# StreamChecker.init_ will be called before every test case, in which you can do some necessary initializations.",
"envInfo":"{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 17 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level two optimization (<code>-O2</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\"], \"java\": [\"Java\", \"<p><code> OpenJDK 17 </code>. Java 8 features such as lambda expressions and stream API can be used. </p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n<p>Includes <code>Pair</code> class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.</p>\"], \"python\": [\"Python\", \"<p><code>Python 2.7.12</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/2/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/2/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/2/library/collections.html\\\" target=\\\"_blank\\\">collections</a>. If you need more libraries, you can import it yourself.</p>\\r\\n\\r\\n<p>For Map/TreeMap data structure, you may use <a href=\\\"http://www.grantjenks.com/docs/sortedcontainers/\\\" target=\\\"_blank\\\">sortedcontainers</a> library.</p>\\r\\n\\r\\n<p>Note that Python 2.7 <a href=\\\"https://www.python.org/dev/peps/pep-0373/\\\" target=\\\"_blank\\\">will not be maintained past 2020</a>. For the latest Python, please choose Python3 instead.</p>\"], \"c\": [\"C\", \"<p>Compiled with <code>gcc 8.2</code> using the gnu99 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level one optimization (<code>-O1</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n\\r\\n<p>For hash table operations, you may use <a href=\\\"https://troydhanson.github.io/uthash/\\\" target=\\\"_blank\\\">uthash</a>. \\\"uthash.h\\\" is included by default. Below are some examples:</p>\\r\\n\\r\\n<p><b>1. Adding an item to a hash.</b>\\r\\n<pre>\\r\\nstruct hash_entry {\\r\\n int id; /* we'll use this field as the key */\\r\\n char name[10];\\r\\n UT_hash_handle hh; /* makes this structure hashable */\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = NULL;\\r\\n\\r\\nvoid add_user(struct hash_entry *s) {\\r\\n HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>2. Looking up an item in a hash:</b>\\r\\n<pre>\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n struct hash_entry *s;\\r\\n HASH_FIND_INT(users, &user_id, s);\\r\\n return s;\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>3. Deleting an item in a hash:</b>\\r\\n<pre>\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n</pre>\\r\\n</p>\"], \"csharp\": [\"C#\", \"<p><a href=\\\"https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-9\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></p>\\r\\n\\r\\n<p>Your code is compiled with debug flag enabled (<code>/debug</code>).</p>\"], \"javascript\": [\"JavaScript\", \"<p><code>Node.js 16.13.2</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES6 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\\r\\n\\r\\n<p>For Priority Queue / Queue data structures, you may use <a href=\\\"https://github.com/datastructures-js/priority-queue\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and <a href=\\\"https:
