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"question": {
"questionId": "100273",
"questionFrontendId": "剑指 Offer 09",
"categoryTitle": "LCOF",
"boundTopicId": 84836,
"title": "用两个栈实现队列 LCOF",
"titleSlug": "yong-liang-ge-zhan-shi-xian-dui-lie-lcof",
"content": "English description is not available for the problem. Please switch to Chinese.",
"translatedTitle": "用两个栈实现队列",
"translatedContent": "<p>用两个栈实现一个队列。队列的声明如下，请实现它的两个函数 <code>appendTail</code> 和 <code>deleteHead</code> ，分别完成在队列尾部插入整数和在队列头部删除整数的功能。(若队列中没有元素，<code>deleteHead</code> 操作返回 -1 )</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><strong>输入：</strong>\n["CQueue","appendTail","deleteHead","deleteHead"]\n[[],[3],[],[]]\n<strong>输出：</strong>[null,null,3,-1]\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><strong>输入：</strong>\n["CQueue","deleteHead","appendTail","appendTail","deleteHead","deleteHead"]\n[[],[],[5],[2],[],[]]\n<strong>输出：</strong>[null,-1,null,null,5,2]\n</pre>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 <= values <= 10000</code></li>\n\t<li><code>最多会对 appendTail、deleteHead 进行 10000 次调用</code></li>\n</ul>\n",
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"lang": "C++",
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"code": "class CQueue {\npublic:\n CQueue() {\n\n }\n \n void appendTail(int value) {\n\n }\n \n int deleteHead() {\n\n }\n};\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * CQueue* obj = new CQueue();\n * obj->appendTail(value);\n * int param_2 = obj->deleteHead();\n */",
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"lang": "Java",
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"code": "class CQueue {\n\n public CQueue() {\n\n }\n \n public void appendTail(int value) {\n\n }\n \n public int deleteHead() {\n\n }\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * CQueue obj = new CQueue();\n * obj.appendTail(value);\n * int param_2 = obj.deleteHead();\n */",
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"lang": "Python",
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"code": "class CQueue(object):\n\n def __init__(self):\n\n\n def appendTail(self, value):\n \"\"\"\n :type value: int\n :rtype: None\n \"\"\"\n\n\n def deleteHead(self):\n \"\"\"\n :rtype: int\n \"\"\"\n\n\n\n# Your CQueue object will be instantiated and called as such:\n# obj = CQueue()\n# obj.appendTail(value)\n# param_2 = obj.deleteHead()",
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"lang": "Python3",
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"code": "class CQueue:\n\n def __init__(self):\n\n\n def appendTail(self, value: int) -> None:\n\n\n def deleteHead(self) -> int:\n\n\n\n# Your CQueue object will be instantiated and called as such:\n# obj = CQueue()\n# obj.appendTail(value)\n# param_2 = obj.deleteHead()",
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"lang": "C",
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"code": "\n\n\ntypedef struct {\n\n} CQueue;\n\n\nCQueue* cQueueCreate() {\n\n}\n\nvoid cQueueAppendTail(CQueue* obj, int value) {\n\n}\n\nint cQueueDeleteHead(CQueue* obj) {\n\n}\n\nvoid cQueueFree(CQueue* obj) {\n\n}\n\n/**\n * Your CQueue struct will be instantiated and called as such:\n * CQueue* obj = cQueueCreate();\n * cQueueAppendTail(obj, value);\n \n * int param_2 = cQueueDeleteHead(obj);\n \n * cQueueFree(obj);\n*/",
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"code": "public class CQueue {\n\n public CQueue() {\n\n }\n \n public void AppendTail(int value) {\n\n }\n \n public int DeleteHead() {\n\n }\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * CQueue obj = new CQueue();\n * obj.AppendTail(value);\n * int param_2 = obj.DeleteHead();\n */",
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"code": "\nvar CQueue = function() {\n\n};\n\n/** \n * @param {number} value\n * @return {void}\n */\nCQueue.prototype.appendTail = function(value) {\n\n};\n\n/**\n * @return {number}\n */\nCQueue.prototype.deleteHead = function() {\n\n};\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * var obj = new CQueue()\n * obj.appendTail(value)\n * var param_2 = obj.deleteHead()\n */",
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"lang": "Ruby",
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"code": "class CQueue\n def initialize()\n\n end\n\n\n=begin\n :type value: Integer\n :rtype: Void\n=end\n def append_tail(value)\n\n end\n\n\n=begin\n :rtype: Integer\n=end\n def delete_head()\n\n end\n\n\nend\n\n# Your CQueue object will be instantiated and called as such:\n# obj = CQueue.new()\n# obj.append_tail(value)\n# param_2 = obj.delete_head()",
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"lang": "Swift",
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"code": "\nclass CQueue {\n\n init() {\n\n }\n \n func appendTail(_ value: Int) {\n\n }\n \n func deleteHead() -> Int {\n\n }\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * let obj = CQueue()\n * obj.appendTail(value)\n * let ret_2: Int = obj.deleteHead()\n */",
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"lang": "Go",
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"code": "type CQueue struct {\n\n}\n\n\nfunc Constructor() CQueue {\n\n}\n\n\nfunc (this *CQueue) AppendTail(value int) {\n\n}\n\n\nfunc (this *CQueue) DeleteHead() int {\n\n}\n\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * obj := Constructor();\n * obj.AppendTail(value);\n * param_2 := obj.DeleteHead();\n */",
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"lang": "Scala",
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"code": "class CQueue() {\n\n def appendTail(value: Int) {\n\n }\n\n def deleteHead(): Int = {\n\n }\n\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * var obj = new CQueue()\n * obj.appendTail(value)\n * var param_2 = obj.deleteHead()\n */",
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"code": "class CQueue() {\n\n fun appendTail(value: Int) {\n\n }\n\n fun deleteHead(): Int {\n\n }\n\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * var obj = CQueue()\n * obj.appendTail(value)\n * var param_2 = obj.deleteHead()\n */",
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"lang": "Rust",
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"code": "struct CQueue {\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 CQueue {\n\n fn new() -> Self {\n\n }\n \n fn append_tail(&self, value: i32) {\n\n }\n \n fn delete_head(&self) -> i32 {\n\n }\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * let obj = CQueue::new();\n * obj.append_tail(value);\n * let ret_2: i32 = obj.delete_head();\n */",
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"code": "class CQueue {\n /**\n */\n function __construct() {\n\n }\n\n /**\n * @param Integer $value\n * @return NULL\n */\n function appendTail($value) {\n\n }\n\n /**\n * @return Integer\n */\n function deleteHead() {\n\n }\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * $obj = CQueue();\n * $obj->appendTail($value);\n * $ret_2 = $obj->deleteHead();\n */",
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"code": "class CQueue {\n constructor() {\n\n }\n\n appendTail(value: number): void {\n\n }\n\n deleteHead(): number {\n\n }\n}\n\n/**\n * Your CQueue object will be instantiated and called as such:\n * var obj = new CQueue()\n * obj.appendTail(value)\n * var param_2 = obj.deleteHead()\n */",
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"code": "(define c-queue%\n (class object%\n (super-new)\n (init-field)\n \n ; append-tail : exact-integer? -> void?\n (define/public (append-tail value)\n\n )\n ; delete-head : -> exact-integer?\n (define/public (delete-head)\n\n )))\n\n;; Your c-queue% object will be instantiated and called as such:\n;; (define obj (new c-queue%))\n;; (send obj append-tail value)\n;; (define param_2 (send obj delete-head))",
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"code": "defmodule CQueue do\n @spec init_() :: any\n def init_() do\n\n end\n\n @spec append_tail(value :: integer) :: any\n def append_tail(value) do\n\n end\n\n @spec delete_head() :: integer\n def delete_head() do\n\n end\nend\n\n# Your functions will be called as such:\n# CQueue.init_()\n# CQueue.append_tail(value)\n# param_2 = CQueue.delete_head()\n\n# CQueue.init_ will be called before every test case, in which you can do some necessary initializations.",
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