"content":"<blockquote>Note: This is a companion problem to the <a href=\"https://leetcode.com/discuss/interview-question/system-design/\" target=\"_blank\">System Design</a> problem: <a href=\"https://leetcode.com/discuss/interview-question/124658/Design-a-URL-Shortener-(-TinyURL-)-System/\" target=\"_blank\">Design TinyURL</a>.</blockquote>\n\n<p>TinyURL is a URL shortening service where you enter a URL such as <code>https://leetcode.com/problems/design-tinyurl</code> and it returns a short URL such as <code>http://tinyurl.com/4e9iAk</code>. Design a class to encode a URL and decode a tiny URL.</p>\n\n<p>There is no restriction on how your encode/decode algorithm should work. You just need to ensure that a URL can be encoded to a tiny URL and the tiny URL can be decoded to the original URL.</p>\n\n<p>Implement the <code>Solution</code> class:</p>\n\n<ul>\n\t<li><code>Solution()</code> Initializes the object of the system.</li>\n\t<li><code>String encode(String longUrl)</code> Returns a tiny URL for the given <code>longUrl</code>.</li>\n\t<li><code>String decode(String shortUrl)</code> Returns the original long URL for the given <code>shortUrl</code>. It is guaranteed that the given <code>shortUrl</code> was encoded by the same object.</li>\n</ul>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> url = "https://leetcode.com/problems/design-tinyurl"\n<strong>Output:</strong> "https://leetcode.com/problems/design-tinyurl"\n\n<strong>Explanation:</strong>\nSolution obj = new Solution();\nstring tiny = obj.encode(url); // returns the encoded tiny url.\nstring ans = obj.decode(tiny); // returns the original url after decoding it.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= url.length <= 10<sup>4</sup></code></li>\n\t<li><code>url</code> is guranteed to be a valid URL.</li>\n</ul>\n",
"code":"class Solution {\npublic:\n\n // Encodes a URL to a shortened URL.\n string encode(string longUrl) {\n \n }\n\n // Decodes a shortened URL to its original URL.\n string decode(string shortUrl) {\n \n }\n};\n\n// Your Solution object will be instantiated and called as such:\n// Solution solution;\n// solution.decode(solution.encode(url));",
"__typename":"CodeSnippetNode"
},
{
"lang":"Java",
"langSlug":"java",
"code":"public class Codec {\n\n // Encodes a URL to a shortened URL.\n public String encode(String longUrl) {\n \n }\n\n // Decodes a shortened URL to its original URL.\n public String decode(String shortUrl) {\n \n }\n}\n\n// Your Codec object will be instantiated and called as such:\n// Codec codec = new Codec();\n// codec.decode(codec.encode(url));",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python",
"langSlug":"python",
"code":"class Codec:\n\n def encode(self, longUrl):\n \"\"\"Encodes a URL to a shortened URL.\n \n :type longUrl: str\n :rtype: str\n \"\"\"\n \n\n def decode(self, shortUrl):\n \"\"\"Decodes a shortened URL to its original URL.\n \n :type shortUrl: str\n :rtype: str\n \"\"\"\n \n\n# Your Codec object will be instantiated and called as such:\n# codec = Codec()\n# codec.decode(codec.encode(url))",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python3",
"langSlug":"python3",
"code":"class Codec:\n\n def encode(self, longUrl: str) -> str:\n \"\"\"Encodes a URL to a shortened URL.\n \"\"\"\n \n\n def decode(self, shortUrl: str) -> str:\n \"\"\"Decodes a shortened URL to its original URL.\n \"\"\"\n \n\n# Your Codec object will be instantiated and called as such:\n# codec = Codec()\n# codec.decode(codec.encode(url))",
"__typename":"CodeSnippetNode"
},
{
"lang":"C",
"langSlug":"c",
"code":"/** Encodes a URL to a shortened URL. */\nchar* encode(char* longUrl) {\n \n}\n\n/** Decodes a shortened URL to its original URL. */\nchar* decode(char* shortUrl) {\n \n}\n\n// Your functions will be called as such:\n// char* s = encode(s);\n// decode(s);",
"__typename":"CodeSnippetNode"
},
{
"lang":"C#",
"langSlug":"csharp",
"code":"public class Codec {\n\n // Encodes a URL to a shortened URL\n public string encode(string longUrl) {\n \n }\n\n // Decodes a shortened URL to its original URL.\n public string decode(string shortUrl) {\n \n }\n}\n\n// Your Codec object will be instantiated and called as such:\n// Codec codec = new Codec();\n// codec.decode(codec.encode(url));",
"__typename":"CodeSnippetNode"
},
{
"lang":"JavaScript",
"langSlug":"javascript",
"code":"/**\n * Encodes a URL to a shortened URL.\n *\n * @param {string} longUrl\n * @return {string}\n */\nvar encode = function(longUrl) {\n \n};\n\n/**\n * Decodes a shortened URL to its original URL.\n *\n * @param {string} shortUrl\n * @return {string}\n */\nvar decode = function(shortUrl) {\n \n};\n\n/**\n * Your functions will be called as such:\n * decode(encode(url));\n */",
"code":"/**\n * Encodes a URL to a shortened URL.\n */\nfunction encode(longUrl: string): string {\n\t\n};\n\n/**\n * Decodes a shortened URL to its original URL.\n */\nfunction decode(shortUrl: string): string {\n\t\n};\n\n/**\n * Your functions will be called as such:\n * decode(encode(strs));\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"PHP",
"langSlug":"php",
"code":"class Codec {\n /**\n * Encodes a URL to a shortened URL.\n * @param String $longUrl\n * @return String\n */\n function encode($longUrl) {\n \n }\n \n /**\n * Decodes a shortened URL to its original URL.\n * @param String $shortUrl\n * @return String\n */\n function decode($shortUrl) {\n \n }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * $obj = Codec();\n * $s = $obj->encode($longUrl);\n * $ans = $obj->decode($s);\n */",
"code":"class Codec {\n // Encodes a URL to a shortened URL.\n func encode(_ longUrl: String) -> String {\n \n }\n \n // Decodes a shortened URL to its original URL.\n func decode(_ shortUrl: String) -> String {\n \n }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * let obj = Codec()\n * val s = obj.encode(longUrl)\n * let ans = obj.decode(s)\n*/",
"code":"class Codec() {\n // Encodes a URL to a shortened URL.\n fun encode(longUrl: String): String {\n \n }\n\n // Decodes a shortened URL to its original URL.\n fun decode(shortUrl: String): String {\n \n }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * var obj = Codec()\n * var url = obj.encode(longUrl)\n * var ans = obj.decode(url)\n */",
"code":"type Codec struct {\n \n}\n\n\nfunc Constructor() Codec {\n \n}\n\n// Encodes a URL to a shortened URL.\nfunc (this *Codec) encode(longUrl string) string {\n\t\n}\n\n// Decodes a shortened URL to its original URL.\nfunc (this *Codec) decode(shortUrl string) string {\n \n}\n\n\n/**\n * Your Codec object will be instantiated and called as such:\n * obj := Constructor();\n * url := obj.encode(longUrl);\n * ans := obj.decode(url);\n */\n",
"code":"# Encodes a URL to a shortened URL.\n#\n# @param {string} longUrl\n# @return {string}\ndef encode(longUrl)\n \nend\n\n# Decodes a shortened URL to its original URL.\n#\n# @param {string} shortUrl\n# @return {string}\ndef decode(shortUrl)\n \nend\n\n\n# Your functions will be called as such:\n# decode(encode(url))",
"code":"class Codec {\n // Encodes a URL to a shortened URL.\n def encode(longURL: String): String = {\n \n }\n \n // Decodes a shortened URL to its original URL.\n def decode(shortURL: String): String = {\n \n }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * var obj = new Codec()\n * val s = obj.encode(longURL)\n * val ans = obj.decode(s)\n */",
"code":"struct Codec {\n\t\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 Codec {\n fn new() -> Self {\n \n }\n\t\n // Encodes a URL to a shortened URL.\n fn encode(&self, longURL: String) -> String {\n \n }\n\t\n // Decodes a shortened URL to its original URL.\n fn decode(&self, shortURL: String) -> String {\n \n }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * let obj = Codec::new();\n * let s: String = obj.encode(strs);\n * let ans: VecVec<String> = obj.decode(s);\n */",
"envInfo":"{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 20 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 gnu11 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://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></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 5.3.0 version of <a href=\\\"https://github.com/datastructures-js/priority-queue/tree/fb4fdb984834421279aeb081df7af624d17c2a03\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and 4.2.1 version of <a href=\\\"https://githu
