{
"data": {
"question": {
"questionId": "2169",
"questionFrontendId": "2043",
"boundTopicId": null,
"title": "Simple Bank System",
"titleSlug": "simple-bank-system",
"content": "<p>You have been tasked with writing a program for a popular bank that will automate all its incoming transactions (transfer, deposit, and withdraw). The bank has <code>n</code> accounts numbered from <code>1</code> to <code>n</code>. The initial balance of each account is stored in a <strong>0-indexed</strong> integer array <code>balance</code>, with the <code>(i + 1)<sup>th</sup></code> account having an initial balance of <code>balance[i]</code>.</p>\n\n<p>Execute all the <strong>valid</strong> transactions. A transaction is <strong>valid</strong> if:</p>\n\n<ul>\n\t<li>The given account number(s) are between <code>1</code> and <code>n</code>, and</li>\n\t<li>The amount of money withdrawn or transferred from is <strong>less than or equal</strong> to the balance of the account.</li>\n</ul>\n\n<p>Implement the <code>Bank</code> class:</p>\n\n<ul>\n\t<li><code>Bank(long[] balance)</code> Initializes the object with the <strong>0-indexed</strong> integer array <code>balance</code>.</li>\n\t<li><code>boolean transfer(int account1, int account2, long money)</code> Transfers <code>money</code> dollars from the account numbered <code>account1</code> to the account numbered <code>account2</code>. Return <code>true</code> if the transaction was successful, <code>false</code> otherwise.</li>\n\t<li><code>boolean deposit(int account, long money)</code> Deposit <code>money</code> dollars into the account numbered <code>account</code>. Return <code>true</code> if the transaction was successful, <code>false</code> otherwise.</li>\n\t<li><code>boolean withdraw(int account, long money)</code> Withdraw <code>money</code> dollars from the account numbered <code>account</code>. Return <code>true</code> if the transaction was successful, <code>false</code> otherwise.</li>\n</ul>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n["Bank", "withdraw", "transfer", "deposit", "transfer", "withdraw"]\n[[[10, 100, 20, 50, 30]], [3, 10], [5, 1, 20], [5, 20], [3, 4, 15], [10, 50]]\n<strong>Output</strong>\n[null, true, true, true, false, false]\n\n<strong>Explanation</strong>\nBank bank = new Bank([10, 100, 20, 50, 30]);\nbank.withdraw(3, 10); // return true, account 3 has a balance of $20, so it is valid to withdraw $10.\n // Account 3 has $20 - $10 = $10.\nbank.transfer(5, 1, 20); // return true, account 5 has a balance of $30, so it is valid to transfer $20.\n // Account 5 has $30 - $20 = $10, and account 1 has $10 + $20 = $30.\nbank.deposit(5, 20); // return true, it is valid to deposit $20 to account 5.\n // Account 5 has $10 + $20 = $30.\nbank.transfer(3, 4, 15); // return false, the current balance of account 3 is $10,\n // so it is invalid to transfer $15 from it.\nbank.withdraw(10, 50); // return false, it is invalid because account 10 does not exist.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == balance.length</code></li>\n\t<li><code>1 <= n, account, account1, account2 <= 10<sup>5</sup></code></li>\n\t<li><code>0 <= balance[i], money <= 10<sup>12</sup></code></li>\n\t<li>At most <code>10<sup>4</sup></code> calls will be made to <strong>each</strong> function <code>transfer</code>, <code>deposit</code>, <code>withdraw</code>.</li>\n</ul>\n",
"translatedTitle": null,
"translatedContent": null,
"isPaidOnly": false,
"difficulty": "Medium",
"likes": 99,
"dislikes": 113,
"isLiked": null,
"similarQuestions": "[]",
"exampleTestcases": "[\"Bank\",\"withdraw\",\"transfer\",\"deposit\",\"transfer\",\"withdraw\"]\n[[[10,100,20,50,30]],[3,10],[5,1,20],[5,20],[3,4,15],[10,50]]",
"categoryTitle": "Algorithms",
"contributors": [],
"topicTags": [
{
"name": "Array",
"slug": "array",
"translatedName": null,
"__typename": "TopicTagNode"
},
{
"name": "Hash Table",
"slug": "hash-table",
"translatedName": null,
"__typename": "TopicTagNode"
},
{
"name": "Design",
"slug": "design",
"translatedName": null,
"__typename": "TopicTagNode"
},
{
"name": "Simulation",
"slug": "simulation",
"translatedName": null,
"__typename": "TopicTagNode"
}
],
"companyTagStats": null,
"codeSnippets": [
{
"lang": "C++",
"langSlug": "cpp",
"code": "class Bank {\npublic:\n Bank(vector<long long>& balance) {\n \n }\n \n bool transfer(int account1, int account2, long long money) {\n \n }\n \n bool deposit(int account, long long money) {\n \n }\n \n bool withdraw(int account, long long money) {\n \n }\n};\n\n/**\n * Your Bank object will be instantiated and called as such:\n * Bank* obj = new Bank(balance);\n * bool param_1 = obj->transfer(account1,account2,money);\n * bool param_2 = obj->deposit(account,money);\n * bool param_3 = obj->withdraw(account,money);\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Java",
"langSlug": "java",
"code": "class Bank {\n\n public Bank(long[] balance) {\n \n }\n \n public boolean transfer(int account1, int account2, long money) {\n \n }\n \n public boolean deposit(int account, long money) {\n \n }\n \n public boolean withdraw(int account, long money) {\n \n }\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * Bank obj = new Bank(balance);\n * boolean param_1 = obj.transfer(account1,account2,money);\n * boolean param_2 = obj.deposit(account,money);\n * boolean param_3 = obj.withdraw(account,money);\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Python",
"langSlug": "python",
"code": "class Bank(object):\n\n def __init__(self, balance):\n \"\"\"\n :type balance: List[int]\n \"\"\"\n \n\n def transfer(self, account1, account2, money):\n \"\"\"\n :type account1: int\n :type account2: int\n :type money: int\n :rtype: bool\n \"\"\"\n \n\n def deposit(self, account, money):\n \"\"\"\n :type account: int\n :type money: int\n :rtype: bool\n \"\"\"\n \n\n def withdraw(self, account, money):\n \"\"\"\n :type account: int\n :type money: int\n :rtype: bool\n \"\"\"\n \n\n\n# Your Bank object will be instantiated and called as such:\n# obj = Bank(balance)\n# param_1 = obj.transfer(account1,account2,money)\n# param_2 = obj.deposit(account,money)\n# param_3 = obj.withdraw(account,money)",
"__typename": "CodeSnippetNode"
},
{
"lang": "Python3",
"langSlug": "python3",
"code": "class Bank:\n\n def __init__(self, balance: List[int]):\n \n\n def transfer(self, account1: int, account2: int, money: int) -> bool:\n \n\n def deposit(self, account: int, money: int) -> bool:\n \n\n def withdraw(self, account: int, money: int) -> bool:\n \n\n\n# Your Bank object will be instantiated and called as such:\n# obj = Bank(balance)\n# param_1 = obj.transfer(account1,account2,money)\n# param_2 = obj.deposit(account,money)\n# param_3 = obj.withdraw(account,money)",
"__typename": "CodeSnippetNode"
},
{
"lang": "C",
"langSlug": "c",
"code": "\n\n\ntypedef struct {\n \n} Bank;\n\n\nBank* bankCreate(long long* balance, int balanceSize) {\n \n}\n\nbool bankTransfer(Bank* obj, int account1, int account2, long long money) {\n \n}\n\nbool bankDeposit(Bank* obj, int account, long long money) {\n \n}\n\nbool bankWithdraw(Bank* obj, int account, long long money) {\n \n}\n\nvoid bankFree(Bank* obj) {\n \n}\n\n/**\n * Your Bank struct will be instantiated and called as such:\n * Bank* obj = bankCreate(balance, balanceSize);\n * bool param_1 = bankTransfer(obj, account1, account2, money);\n \n * bool param_2 = bankDeposit(obj, account, money);\n \n * bool param_3 = bankWithdraw(obj, account, money);\n \n * bankFree(obj);\n*/",
"__typename": "CodeSnippetNode"
},
{
"lang": "C#",
"langSlug": "csharp",
"code": "public class Bank {\n\n public Bank(long[] balance) {\n \n }\n \n public bool Transfer(int account1, int account2, long money) {\n \n }\n \n public bool Deposit(int account, long money) {\n \n }\n \n public bool Withdraw(int account, long money) {\n \n }\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * Bank obj = new Bank(balance);\n * bool param_1 = obj.Transfer(account1,account2,money);\n * bool param_2 = obj.Deposit(account,money);\n * bool param_3 = obj.Withdraw(account,money);\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "JavaScript",
"langSlug": "javascript",
"code": "/**\n * @param {number[]} balance\n */\nvar Bank = function(balance) {\n \n};\n\n/** \n * @param {number} account1 \n * @param {number} account2 \n * @param {number} money\n * @return {boolean}\n */\nBank.prototype.transfer = function(account1, account2, money) {\n \n};\n\n/** \n * @param {number} account \n * @param {number} money\n * @return {boolean}\n */\nBank.prototype.deposit = function(account, money) {\n \n};\n\n/** \n * @param {number} account \n * @param {number} money\n * @return {boolean}\n */\nBank.prototype.withdraw = function(account, money) {\n \n};\n\n/** \n * Your Bank object will be instantiated and called as such:\n * var obj = new Bank(balance)\n * var param_1 = obj.transfer(account1,account2,money)\n * var param_2 = obj.deposit(account,money)\n * var param_3 = obj.withdraw(account,money)\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Ruby",
"langSlug": "ruby",
"code": "class Bank\n\n=begin\n :type balance: Integer[]\n=end\n def initialize(balance)\n \n end\n\n\n=begin\n :type account1: Integer\n :type account2: Integer\n :type money: Integer\n :rtype: Boolean\n=end\n def transfer(account1, account2, money)\n \n end\n\n\n=begin\n :type account: Integer\n :type money: Integer\n :rtype: Boolean\n=end\n def deposit(account, money)\n \n end\n\n\n=begin\n :type account: Integer\n :type money: Integer\n :rtype: Boolean\n=end\n def withdraw(account, money)\n \n end\n\n\nend\n\n# Your Bank object will be instantiated and called as such:\n# obj = Bank.new(balance)\n# param_1 = obj.transfer(account1, account2, money)\n# param_2 = obj.deposit(account, money)\n# param_3 = obj.withdraw(account, money)",
"__typename": "CodeSnippetNode"
},
{
"lang": "Swift",
"langSlug": "swift",
"code": "\nclass Bank {\n\n init(_ balance: [Int]) {\n \n }\n \n func transfer(_ account1: Int, _ account2: Int, _ money: Int) -> Bool {\n \n }\n \n func deposit(_ account: Int, _ money: Int) -> Bool {\n \n }\n \n func withdraw(_ account: Int, _ money: Int) -> Bool {\n \n }\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * let obj = Bank(balance)\n * let ret_1: Bool = obj.transfer(account1, account2, money)\n * let ret_2: Bool = obj.deposit(account, money)\n * let ret_3: Bool = obj.withdraw(account, money)\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Go",
"langSlug": "golang",
"code": "type Bank struct {\n \n}\n\n\nfunc Constructor(balance []int64) Bank {\n \n}\n\n\nfunc (this *Bank) Transfer(account1 int, account2 int, money int64) bool {\n \n}\n\n\nfunc (this *Bank) Deposit(account int, money int64) bool {\n \n}\n\n\nfunc (this *Bank) Withdraw(account int, money int64) bool {\n \n}\n\n\n/**\n * Your Bank object will be instantiated and called as such:\n * obj := Constructor(balance);\n * param_1 := obj.Transfer(account1,account2,money);\n * param_2 := obj.Deposit(account,money);\n * param_3 := obj.Withdraw(account,money);\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Scala",
"langSlug": "scala",
"code": "class Bank(_balance: Array[Long]) {\n\n def transfer(account1: Int, account2: Int, money: Long): Boolean = {\n \n }\n\n def deposit(account: Int, money: Long): Boolean = {\n \n }\n\n def withdraw(account: Int, money: Long): Boolean = {\n \n }\n\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * var obj = new Bank(balance)\n * var param_1 = obj.transfer(account1,account2,money)\n * var param_2 = obj.deposit(account,money)\n * var param_3 = obj.withdraw(account,money)\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Kotlin",
"langSlug": "kotlin",
"code": "class Bank(balance: LongArray) {\n\n fun transfer(account1: Int, account2: Int, money: Long): Boolean {\n \n }\n\n fun deposit(account: Int, money: Long): Boolean {\n \n }\n\n fun withdraw(account: Int, money: Long): Boolean {\n \n }\n\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * var obj = Bank(balance)\n * var param_1 = obj.transfer(account1,account2,money)\n * var param_2 = obj.deposit(account,money)\n * var param_3 = obj.withdraw(account,money)\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Rust",
"langSlug": "rust",
"code": "struct Bank {\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 Bank {\n\n fn new(balance: Vec<i64>) -> Self {\n \n }\n \n fn transfer(&self, account1: i32, account2: i32, money: i64) -> bool {\n \n }\n \n fn deposit(&self, account: i32, money: i64) -> bool {\n \n }\n \n fn withdraw(&self, account: i32, money: i64) -> bool {\n \n }\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * let obj = Bank::new(balance);\n * let ret_1: bool = obj.transfer(account1, account2, money);\n * let ret_2: bool = obj.deposit(account, money);\n * let ret_3: bool = obj.withdraw(account, money);\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "PHP",
"langSlug": "php",
"code": "class Bank {\n /**\n * @param Integer[] $balance\n */\n function __construct($balance) {\n \n }\n \n /**\n * @param Integer $account1\n * @param Integer $account2\n * @param Integer $money\n * @return Boolean\n */\n function transfer($account1, $account2, $money) {\n \n }\n \n /**\n * @param Integer $account\n * @param Integer $money\n * @return Boolean\n */\n function deposit($account, $money) {\n \n }\n \n /**\n * @param Integer $account\n * @param Integer $money\n * @return Boolean\n */\n function withdraw($account, $money) {\n \n }\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * $obj = Bank($balance);\n * $ret_1 = $obj->transfer($account1, $account2, $money);\n * $ret_2 = $obj->deposit($account, $money);\n * $ret_3 = $obj->withdraw($account, $money);\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "TypeScript",
"langSlug": "typescript",
"code": "class Bank {\n constructor(balance: number[]) {\n\n }\n\n transfer(account1: number, account2: number, money: number): boolean {\n\n }\n\n deposit(account: number, money: number): boolean {\n\n }\n\n withdraw(account: number, money: number): boolean {\n\n }\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * var obj = new Bank(balance)\n * var param_1 = obj.transfer(account1,account2,money)\n * var param_2 = obj.deposit(account,money)\n * var param_3 = obj.withdraw(account,money)\n */",
"__typename": "CodeSnippetNode"
},
{
"lang": "Racket",
"langSlug": "racket",
"code": "(define bank%\n (class object%\n (super-new)\n\n ; balance : (listof exact-integer?)\n (init-field\n balance)\n \n ; transfer : exact-integer? exact-integer? exact-integer? -> boolean?\n (define/public (transfer account1 account2 money)\n\n )\n ; deposit : exact-integer? exact-integer? -> boolean?\n (define/public (deposit account money)\n\n )\n ; withdraw : exact-integer? exact-integer? -> boolean?\n (define/public (withdraw account money)\n\n )))\n\n;; Your bank% object will be instantiated and called as such:\n;; (define obj (new bank% [balance balance]))\n;; (define param_1 (send obj transfer account1 account2 money))\n;; (define param_2 (send obj deposit account money))\n;; (define param_3 (send obj withdraw account money))",
"__typename": "CodeSnippetNode"
},
{
"lang": "Erlang",
"langSlug": "erlang",
"code": "-spec bank_init_(Balance :: [integer()]) -> any().\nbank_init_(Balance) ->\n .\n\n-spec bank_transfer(Account1 :: integer(), Account2 :: integer(), Money :: integer()) -> boolean().\nbank_transfer(Account1, Account2, Money) ->\n .\n\n-spec bank_deposit(Account :: integer(), Money :: integer()) -> boolean().\nbank_deposit(Account, Money) ->\n .\n\n-spec bank_withdraw(Account :: integer(), Money :: integer()) -> boolean().\nbank_withdraw(Account, Money) ->\n .\n\n\n%% Your functions will be called as such:\n%% bank_init_(Balance),\n%% Param_1 = bank_transfer(Account1, Account2, Money),\n%% Param_2 = bank_deposit(Account, Money),\n%% Param_3 = bank_withdraw(Account, Money),\n\n%% bank_init_ will be called before every test case, in which you can do some necessary initializations.",
"__typename": "CodeSnippetNode"
},
{
"lang": "Elixir",
"langSlug": "elixir",
"code": "defmodule Bank do\n @spec init_(balance :: [integer]) :: any\n def init_(balance) do\n\n end\n\n @spec transfer(account1 :: integer, account2 :: integer, money :: integer) :: boolean\n def transfer(account1, account2, money) do\n\n end\n\n @spec deposit(account :: integer, money :: integer) :: boolean\n def deposit(account, money) do\n\n end\n\n @spec withdraw(account :: integer, money :: integer) :: boolean\n def withdraw(account, money) do\n\n end\nend\n\n# Your functions will be called as such:\n# Bank.init_(balance)\n# param_1 = Bank.transfer(account1, account2, money)\n# param_2 = Bank.deposit(account, money)\n# param_3 = Bank.withdraw(account, money)\n\n# Bank.init_ will be called before every test case, in which you can do some necessary initializations.",
"__typename": "CodeSnippetNode"
}
],
"stats": "{\"totalAccepted\": \"12K\", \"totalSubmission\": \"18.4K\", \"totalAcceptedRaw\": 11973, \"totalSubmissionRaw\": 18438, \"acRate\": \"64.9%\"}",
"hints": [
"How do you determine if a transaction will fail?",
"Simply apply the operations if the transaction is valid."
],
"solution": null,
"status": null,
"sampleTestCase": "[\"Bank\",\"withdraw\",\"transfer\",\"deposit\",\"transfer\",\"withdraw\"]\n[[[10,100,20,50,30]],[3,10],[5,1,20],[5,20],[3,4,15],[10,50]]",
"metaData": "{\n \"classname\": \"Bank\",\n \"constructor\": {\n \"params\": [\n {\n \"type\": \"long[]\",\n \"name\": \"balance\"\n }\n ]\n },\n \"methods\": [\n {\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"account1\"\n },\n {\n \"type\": \"integer\",\n \"name\": \"account2\"\n },\n {\n \"type\": \"long\",\n \"name\": \"money\"\n }\n ],\n \"name\": \"transfer\",\n \"return\": {\n \"type\": \"boolean\"\n }\n },\n {\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"account\"\n },\n {\n \"type\": \"long\",\n \"name\": \"money\"\n }\n ],\n \"name\": \"deposit\",\n \"return\": {\n \"type\": \"boolean\"\n }\n },\n {\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"account\"\n },\n {\n \"type\": \"long\",\n \"name\": \"money\"\n }\n ],\n \"name\": \"withdraw\",\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,
"enableTestMode": false,
"enableDebugger": true,
"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://github.com/datastructures-js/queue\\\" target=\\\"_blank\\\">datastructures-js/queue</a>.</p>\"], \"ruby\": [\"Ruby\", \"<p><code>Ruby 3.1</code></p>\\r\\n\\r\\n<p>Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms</p>\"], \"swift\": [\"Swift\", \"<p><code>Swift 5.5.2</code>.</p>\"], \"golang\": [\"Go\", \"<p><code>Go 1.17.6</code>.</p>\\r\\n\\r\\n<p>Support <a href=\\\"https://godoc.org/github.com/emirpasic/gods\\\" target=\\\"_blank\\\">https://godoc.org/github.com/emirpasic/gods</a> library.</p>\"], \"python3\": [\"Python3\", \"<p><code>Python 3.10</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <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>. 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>\"], \"scala\": [\"Scala\", \"<p><code>Scala 2.13.7</code>.</p>\"], \"kotlin\": [\"Kotlin\", \"<p><code>Kotlin 1.3.10</code>.</p>\"], \"rust\": [\"Rust\", \"<p><code>Rust 1.58.1</code></p>\\r\\n\\r\\n<p>Supports <a href=\\\"https://crates.io/crates/rand\\\" target=\\\"_blank\\\">rand </a> v0.6\\u00a0from crates.io</p>\"], \"php\": [\"PHP\", \"<p><code>PHP 8.1</code>.</p>\\r\\n<p>With bcmath module</p>\"], \"typescript\": [\"Typescript\", \"<p><code>TypeScript 4.5.4, 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 ES2020 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\"], \"racket\": [\"Racket\", \"<p>Run with <code>Racket 8.3</code>.</p>\"], \"erlang\": [\"Erlang\", \"Erlang/OTP 24.2\"], \"elixir\": [\"Elixir\", \"Elixir 1.13.0 with Erlang/OTP 24.2\"]}",
"libraryUrl": null,
"adminUrl": null,
"challengeQuestion": null,
"__typename": "QuestionNode"
}
}
}