{ "data": { "question": { "questionId": "100302", "questionFrontendId": "LCR 147", "categoryTitle": "Algorithms", "boundTopicId": 87064, "title": "最小栈", "titleSlug": "bao-han-minhan-shu-de-zhan-lcof", "content": "English description is not available for the problem. Please switch to Chinese.", "translatedTitle": "最小栈", "translatedContent": "
请你设计一个 最小栈 。它提供 push
,pop
,top
操作,并能在常数时间内检索到最小元素的栈。
\n\n
实现 MinStack
类:
MinStack()
初始化堆栈对象。void push(int val)
将元素val推入堆栈。void pop()
删除堆栈顶部的元素。int top()
获取堆栈顶部的元素。int getMin()
获取堆栈中的最小元素。\n\n
示例 1:
\n\n\n输入:\n[\"MinStack\",\"push\",\"push\",\"push\",\"getMin\",\"pop\",\"top\",\"getMin\"]\n[[],[-2],[2],[-3],[],[],[],[]]\n\n输出:\n[null,null,null,null,-3,null,2,-2]\n\n解释:\nMinStack minStack = new MinStack();\nminStack.push(-2);\nminStack.push(2);\nminStack.push(-3);\nminStack.getMin(); --> 返回 -3.\nminStack.pop();\nminStack.top(); --> 返回 2.\nminStack.getMin(); --> 返回 -2.\n\n\n
\n\n
\n提示:
-231 <= val <= 231 - 1
pop
、top
和 getMin
操作总是在 非空栈 上调用push
、pop
、top
和 getMin
最多被调用 3 * 104
次\n\n
注意:本题与主站 155 题相同:https://leetcode-cn.com/problems/min-stack/
\n\n\n", "isPaidOnly": false, "difficulty": "Easy", "likes": 534, "dislikes": 0, "isLiked": null, "similarQuestions": "[]", "contributors": [], "langToValidPlayground": "{\"cpp\": false, \"java\": false, \"python\": false, \"python3\": false, \"mysql\": false, \"mssql\": false, \"oraclesql\": false, \"c\": false, \"csharp\": false, \"javascript\": false, \"typescript\": false, \"bash\": false, \"php\": false, \"swift\": false, \"kotlin\": false, \"dart\": false, \"golang\": false, \"ruby\": false, \"scala\": false, \"html\": false, \"pythonml\": false, \"rust\": false, \"racket\": false, \"erlang\": false, \"elixir\": false, \"pythondata\": false, \"react\": false, \"vanillajs\": false, \"postgresql\": false}", "topicTags": [ { "name": "Stack", "slug": "stack", "translatedName": "栈", "__typename": "TopicTagNode" }, { "name": "Design", "slug": "design", "translatedName": "设计", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": [ { "lang": "C++", "langSlug": "cpp", "code": "class MinStack {\npublic:\n /** initialize your data structure here. */\n MinStack() {\n\n }\n \n void push(int x) {\n\n }\n \n void pop() {\n\n }\n \n int top() {\n\n }\n \n int getMin() {\n\n }\n};\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * MinStack* obj = new MinStack();\n * obj->push(x);\n * obj->pop();\n * int param_3 = obj->top();\n * int param_4 = obj->getMin();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Java", "langSlug": "java", "code": "class MinStack {\n\n /** initialize your data structure here. */\n public MinStack() {\n\n }\n \n public void push(int x) {\n\n }\n \n public void pop() {\n\n }\n \n public int top() {\n\n }\n \n public int getMin() {\n\n }\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * MinStack obj = new MinStack();\n * obj.push(x);\n * obj.pop();\n * int param_3 = obj.top();\n * int param_4 = obj.getMin();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Python", "langSlug": "python", "code": "class MinStack(object):\n\n def __init__(self):\n \"\"\"\n initialize your data structure here.\n \"\"\"\n\n\n def push(self, x):\n \"\"\"\n :type x: int\n :rtype: None\n \"\"\"\n\n\n def pop(self):\n \"\"\"\n :rtype: None\n \"\"\"\n\n\n def top(self):\n \"\"\"\n :rtype: int\n \"\"\"\n\n\n def getMin(self):\n \"\"\"\n :rtype: int\n \"\"\"\n\n\n\n# Your MinStack object will be instantiated and called as such:\n# obj = MinStack()\n# obj.push(x)\n# obj.pop()\n# param_3 = obj.top()\n# param_4 = obj.getMin()", "__typename": "CodeSnippetNode" }, { "lang": "Python3", "langSlug": "python3", "code": "class MinStack:\n\n def __init__(self):\n \"\"\"\n initialize your data structure here.\n \"\"\"\n\n\n def push(self, x: int) -> None:\n\n\n def pop(self) -> None:\n\n\n def top(self) -> int:\n\n\n def getMin(self) -> int:\n\n\n\n# Your MinStack object will be instantiated and called as such:\n# obj = MinStack()\n# obj.push(x)\n# obj.pop()\n# param_3 = obj.top()\n# param_4 = obj.getMin()", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "\n\n\ntypedef struct {\n \n} MinStack;\n\n/** initialize your data structure here. */\n\nMinStack* minStackCreate() {\n \n}\n\nvoid minStackPush(MinStack* obj, int x) {\n \n}\n\nvoid minStackPop(MinStack* obj) {\n \n}\n\nint minStackTop(MinStack* obj) {\n \n}\n\nint minStackGetMin(MinStack* obj) {\n \n}\n\nvoid minStackFree(MinStack* obj) {\n \n}\n\n/**\n * Your MinStack struct will be instantiated and called as such:\n * MinStack* obj = minStackCreate();\n * minStackPush(obj, x);\n \n * minStackPop(obj);\n \n * int param_3 = minStackTop(obj);\n \n * int param_4 = minStackGetMin(obj);\n \n * minStackFree(obj);\n*/", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class MinStack {\n\n /** initialize your data structure here. */\n public MinStack() {\n\n }\n \n public void Push(int x) {\n\n }\n \n public void Pop() {\n\n }\n \n public int Top() {\n\n }\n \n public int GetMin() {\n\n }\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * MinStack obj = new MinStack();\n * obj.Push(x);\n * obj.Pop();\n * int param_3 = obj.Top();\n * int param_4 = obj.GetMin();\n */", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * initialize your data structure here.\n */\nvar MinStack = function() {\n\n};\n\n/** \n * @param {number} x\n * @return {void}\n */\nMinStack.prototype.push = function(x) {\n\n};\n\n/**\n * @return {void}\n */\nMinStack.prototype.pop = function() {\n\n};\n\n/**\n * @return {number}\n */\nMinStack.prototype.top = function() {\n\n};\n\n/**\n * @return {number}\n */\nMinStack.prototype.getMin = function() {\n\n};\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * var obj = new MinStack()\n * obj.push(x)\n * obj.pop()\n * var param_3 = obj.top()\n * var param_4 = obj.getMin()\n */", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "class MinStack {\n constructor() {\n \n }\n\n push(x: number): void {\n \n }\n\n pop(): void {\n \n }\n\n top(): number {\n \n }\n\n getMin(): number {\n \n }\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * var obj = new MinStack()\n * obj.push(x)\n * obj.pop()\n * var param_3 = obj.top()\n * var param_4 = obj.getMin()\n */", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class MinStack {\n /**\n * initialize your data structure here.\n */\n function __construct() {\n\n }\n\n /**\n * @param Integer $x\n * @return NULL\n */\n function push($x) {\n\n }\n\n /**\n * @return NULL\n */\n function pop() {\n\n }\n\n /**\n * @return Integer\n */\n function top() {\n\n }\n\n /**\n * @return Integer\n */\n function getMin() {\n\n }\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * $obj = MinStack();\n * $obj->push($x);\n * $obj->pop();\n * $ret_3 = $obj->top();\n * $ret_4 = $obj->getMin();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "\nclass MinStack {\n\n /** initialize your data structure here. */\n init() {\n\n }\n \n func push(_ x: Int) {\n\n }\n \n func pop() {\n\n }\n \n func top() -> Int {\n\n }\n \n func getMin() -> Int {\n\n }\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * let obj = MinStack()\n * obj.push(x)\n * obj.pop()\n * let ret_3: Int = obj.top()\n * let ret_4: Int = obj.getMin()\n */", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class MinStack() {\n\n /** initialize your data structure here. */\n\n\n fun push(x: Int) {\n\n }\n\n fun pop() {\n\n }\n\n fun top(): Int {\n\n }\n\n fun getMin(): Int {\n\n }\n\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * var obj = MinStack()\n * obj.push(x)\n * obj.pop()\n * var param_3 = obj.top()\n * var param_4 = obj.getMin()\n */", "__typename": "CodeSnippetNode" }, { "lang": "Dart", "langSlug": "dart", "code": "class MinStack {\n\n /** initialize your data structure here. */\n MinStack() {\n \n }\n \n void push(int x) {\n \n }\n \n void pop() {\n \n }\n \n int top() {\n \n }\n \n int getMin() {\n \n }\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * MinStack obj = MinStack();\n * obj.push(x);\n * obj.pop();\n * int param3 = obj.top();\n * int param4 = obj.getMin();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "type MinStack struct {\n\n}\n\n\n/** initialize your data structure here. */\nfunc Constructor() MinStack {\n\n}\n\n\nfunc (this *MinStack) Push(x int) {\n\n}\n\n\nfunc (this *MinStack) Pop() {\n\n}\n\n\nfunc (this *MinStack) Top() int {\n\n}\n\n\nfunc (this *MinStack) GetMin() int {\n\n}\n\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * obj := Constructor();\n * obj.Push(x);\n * obj.Pop();\n * param_3 := obj.Top();\n * param_4 := obj.GetMin();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "class MinStack\n\n=begin\n initialize your data structure here.\n=end\n def initialize()\n\n end\n\n\n=begin\n :type x: Integer\n :rtype: Void\n=end\n def push(x)\n\n end\n\n\n=begin\n :rtype: Void\n=end\n def pop()\n\n end\n\n\n=begin\n :rtype: Integer\n=end\n def top()\n\n end\n\n\n=begin\n :rtype: Integer\n=end\n def get_min()\n\n end\n\n\nend\n\n# Your MinStack object will be instantiated and called as such:\n# obj = MinStack.new()\n# obj.push(x)\n# obj.pop()\n# param_3 = obj.top()\n# param_4 = obj.get_min()", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "class MinStack() {\n\n /** initialize your data structure here. */\n\n\n def push(x: Int) {\n\n }\n\n def pop() {\n\n }\n\n def top(): Int = {\n\n }\n\n def getMin(): Int = {\n\n }\n\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * var obj = new MinStack()\n * obj.push(x)\n * obj.pop()\n * var param_3 = obj.top()\n * var param_4 = obj.getMin()\n */", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "struct MinStack {\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 MinStack {\n\n /** initialize your data structure here. */\n fn new() -> Self {\n\n }\n \n fn push(&self, x: i32) {\n\n }\n \n fn pop(&self) {\n\n }\n \n fn top(&self) -> i32 {\n\n }\n \n fn get_min(&self) -> i32 {\n\n }\n}\n\n/**\n * Your MinStack object will be instantiated and called as such:\n * let obj = MinStack::new();\n * obj.push(x);\n * obj.pop();\n * let ret_3: i32 = obj.top();\n * let ret_4: i32 = obj.get_min();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Racket", "langSlug": "racket", "code": "(define min-stack%\n (class object%\n (super-new)\n \n (init-field)\n \n ; push : exact-integer? -> void?\n (define/public (push x)\n )\n ; pop : -> void?\n (define/public (pop)\n )\n ; top : -> exact-integer?\n (define/public (top)\n )\n ; get-min : -> exact-integer?\n (define/public (get-min)\n )))\n\n;; Your min-stack% object will be instantiated and called as such:\n;; (define obj (new min-stack%))\n;; (send obj push x)\n;; (send obj pop)\n;; (define param_3 (send obj top))\n;; (define param_4 (send obj get-min))", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "-spec min_stack_init_() -> any().\nmin_stack_init_() ->\n .\n\n-spec min_stack_push(X :: integer()) -> any().\nmin_stack_push(X) ->\n .\n\n-spec min_stack_pop() -> any().\nmin_stack_pop() ->\n .\n\n-spec min_stack_top() -> integer().\nmin_stack_top() ->\n .\n\n-spec min_stack_get_min() -> integer().\nmin_stack_get_min() ->\n .\n\n\n%% Your functions will be called as such:\n%% min_stack_init_(),\n%% min_stack_push(X),\n%% min_stack_pop(),\n%% Param_3 = min_stack_top(),\n%% Param_4 = min_stack_get_min(),\n\n%% min_stack_init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "defmodule MinStack do\n @spec init_() :: any\n def init_() do\n \n end\n\n @spec push(x :: integer) :: any\n def push(x) do\n \n end\n\n @spec pop() :: any\n def pop() do\n \n end\n\n @spec top() :: integer\n def top() do\n \n end\n\n @spec get_min() :: integer\n def get_min() do\n \n end\nend\n\n# Your functions will be called as such:\n# MinStack.init_()\n# MinStack.push(x)\n# MinStack.pop()\n# param_3 = MinStack.top()\n# param_4 = MinStack.get_min()\n\n# MinStack.init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"369.3K\", \"totalSubmission\": \"668.4K\", \"totalAcceptedRaw\": 369251, \"totalSubmissionRaw\": 668380, 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