mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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189 lines
37 KiB
JSON
189 lines
37 KiB
JSON
{
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"data": {
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"question": {
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"questionId": "2169",
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"questionFrontendId": "2043",
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"categoryTitle": "Algorithms",
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"boundTopicId": 1048463,
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"title": "Simple Bank System",
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"titleSlug": "simple-bank-system",
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"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The amount of money withdrawn or transferred from is 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 class=\"example\">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",
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"translatedTitle": "简易银行系统",
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"translatedContent": "<p>你的任务是为一个很受欢迎的银行设计一款程序，以自动化执行所有传入的交易（转账，存款和取款）。银行共有 <code>n</code> 个账户，编号从 <code>1</code> 到 <code>n</code> 。每个账号的初始余额存储在一个下标从 <strong>0</strong> 开始的整数数组 <code>balance</code> 中，其中第 <code>(i + 1)</code> 个账户的初始余额是 <code>balance[i]</code> 。</p>\n\n<p>请你执行所有 <strong>有效的</strong> 交易。如果满足下面全部条件，则交易 <strong>有效</strong> ：</p>\n\n<ul>\n\t<li>指定的账户数量在 <code>1</code> 和 <code>n</code> 之间，且</li>\n\t<li>取款或者转账需要的钱的总数 <strong>小于或者等于</strong> 账户余额。</li>\n</ul>\n\n<p>实现 <code>Bank</code> 类：</p>\n\n<ul>\n\t<li><code>Bank(long[] balance)</code> 使用下标从 <strong>0</strong> 开始的整数数组 <code>balance</code> 初始化该对象。</li>\n\t<li><code>boolean transfer(int account1, int account2, long money)</code> 从编号为 <code>account1</code> 的账户向编号为 <code>account2</code> 的账户转帐 <code>money</code> 美元。如果交易成功，返回 <code>true</code> ，否则，返回 <code>false</code> 。</li>\n\t<li><code>boolean deposit(int account, long money)</code> 向编号为 <code>account</code> 的账户存款 <code>money</code> 美元。如果交易成功，返回 <code>true</code> ；否则，返回 <code>false</code> 。</li>\n\t<li><code>boolean withdraw(int account, long money)</code> 从编号为 <code>account</code> 的账户取款 <code>money</code> 美元。如果交易成功，返回 <code>true</code> ；否则，返回 <code>false</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[\"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>输出：</strong>\n[null, true, true, true, false, false]\n\n<strong>解释：</strong>\nBank bank = new Bank([10, 100, 20, 50, 30]);\nbank.withdraw(3, 10); // 返回 true ，账户 3 的余额是 $20 ，所以可以取款 $10 。\n // 账户 3 余额为 $20 - $10 = $10 。\nbank.transfer(5, 1, 20); // 返回 true ，账户 5 的余额是 $30 ，所以可以转账 $20 。\n // 账户 5 的余额为 $30 - $20 = $10 ，账户 1 的余额为 $10 + $20 = $30 。\nbank.deposit(5, 20); // 返回 true ，可以向账户 5 存款 $20 。\n // 账户 5 的余额为 $10 + $20 = $30 。\nbank.transfer(3, 4, 15); // 返回 false ，账户 3 的当前余额是 $10 。\n // 所以无法转账 $15 。\nbank.withdraw(10, 50); // 返回 false ，交易无效，因为账户 10 并不存在。\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</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><code>transfer</code>, <code>deposit</code>, <code>withdraw</code> 三个函数，<strong>每个</strong> 最多调用 <code>10<sup>4</sup></code> 次</li>\n</ul>\n",
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"difficulty": "Medium",
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"lang": "C++",
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"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 */",
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"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 */",
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"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)",
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"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)",
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"lang": "C",
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"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*/",
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"lang": "C#",
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"langSlug": "csharp",
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"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 */",
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"__typename": "CodeSnippetNode"
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},
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"lang": "JavaScript",
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"langSlug": "javascript",
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"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 */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "TypeScript",
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"langSlug": "typescript",
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"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 */",
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"__typename": "CodeSnippetNode"
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},
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"lang": "PHP",
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"langSlug": "php",
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"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 */",
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"__typename": "CodeSnippetNode"
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},
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"lang": "Swift",
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"langSlug": "swift",
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"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 */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Kotlin",
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"langSlug": "kotlin",
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"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 */",
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"__typename": "CodeSnippetNode"
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},
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"lang": "Dart",
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"langSlug": "dart",
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"code": "class Bank {\n\n Bank(List<int> balance) {\n \n }\n \n bool transfer(int account1, int account2, int money) {\n \n }\n \n bool deposit(int account, int money) {\n \n }\n \n bool withdraw(int account, int money) {\n \n }\n}\n\n/**\n * Your Bank object will be instantiated and called as such:\n * Bank obj = Bank(balance);\n * bool param1 = obj.transfer(account1,account2,money);\n * bool param2 = obj.deposit(account,money);\n * bool param3 = obj.withdraw(account,money);\n */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Go",
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"langSlug": "golang",
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"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 */",
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"__typename": "CodeSnippetNode"
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"lang": "Ruby",
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"langSlug": "ruby",
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"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)",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Scala",
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"langSlug": "scala",
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"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 */",
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"__typename": "CodeSnippetNode"
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"lang": "Rust",
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"langSlug": "rust",
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"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 */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Racket",
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"langSlug": "racket",
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"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 ; deposit : exact-integer? exact-integer? -> boolean?\n (define/public (deposit account money)\n )\n ; withdraw : exact-integer? exact-integer? -> boolean?\n (define/public (withdraw account money)\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))",
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"__typename": "CodeSnippetNode"
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},
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"lang": "Erlang",
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"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.",
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"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.",
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"hints": [
|
||
"How do you determine if a transaction will fail?",
|
||
"Simply apply the operations if the transaction is valid."
|
||
],
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||
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||
"status": null,
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"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]]",
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