mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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174 lines
25 KiB
JSON
174 lines
25 KiB
JSON
{
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"data": {
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"question": {
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"questionId": "1497",
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"questionFrontendId": "1381",
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"boundTopicId": null,
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"title": "Design a Stack With Increment Operation",
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"titleSlug": "design-a-stack-with-increment-operation",
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"content": "<p>Design a stack which supports the following operations.</p>\n\n<p>Implement the <code>CustomStack</code> class:</p>\n\n<ul>\n\t<li><code>CustomStack(int maxSize)</code> Initializes the object with <code>maxSize</code> which is the maximum number of elements in the stack or do nothing if the stack reached the <code>maxSize</code>.</li>\n\t<li><code>void push(int x)</code> Adds <code>x</code> to the top of the stack if the stack hasn't reached the <code>maxSize</code>.</li>\n\t<li><code>int pop()</code> Pops and returns the top of stack or <strong>-1</strong> if the stack is empty.</li>\n\t<li><code>void inc(int k, int val)</code> Increments the bottom <code>k</code> elements of the stack by <code>val</code>. If there are less than <code>k</code> elements in the stack, just increment all the elements in the stack.</li>\n</ul>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n["CustomStack","push","push","pop","push","push","push","increment","increment","pop","pop","pop","pop"]\n[[3],[1],[2],[],[2],[3],[4],[5,100],[2,100],[],[],[],[]]\n<strong>Output</strong>\n[null,null,null,2,null,null,null,null,null,103,202,201,-1]\n<strong>Explanation</strong>\nCustomStack customStack = new CustomStack(3); // Stack is Empty []\ncustomStack.push(1); // stack becomes [1]\ncustomStack.push(2); // stack becomes [1, 2]\ncustomStack.pop(); // return 2 --> Return top of the stack 2, stack becomes [1]\ncustomStack.push(2); // stack becomes [1, 2]\ncustomStack.push(3); // stack becomes [1, 2, 3]\ncustomStack.push(4); // stack still [1, 2, 3], Don't add another elements as size is 4\ncustomStack.increment(5, 100); // stack becomes [101, 102, 103]\ncustomStack.increment(2, 100); // stack becomes [201, 202, 103]\ncustomStack.pop(); // return 103 --> Return top of the stack 103, stack becomes [201, 202]\ncustomStack.pop(); // return 202 --> Return top of the stack 102, stack becomes [201]\ncustomStack.pop(); // return 201 --> Return top of the stack 101, stack becomes []\ncustomStack.pop(); // return -1 --> Stack is empty return -1.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= maxSize <= 1000</code></li>\n\t<li><code>1 <= x <= 1000</code></li>\n\t<li><code>1 <= k <= 1000</code></li>\n\t<li><code>0 <= val <= 100</code></li>\n\t<li>At most <code>1000</code> calls will be made to each method of <code>increment</code>, <code>push</code> and <code>pop</code> each separately.</li>\n</ul>\n",
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"translatedTitle": null,
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"difficulty": "Medium",
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"likes": 1118,
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"exampleTestcases": "[\"CustomStack\",\"push\",\"push\",\"pop\",\"push\",\"push\",\"push\",\"increment\",\"increment\",\"pop\",\"pop\",\"pop\",\"pop\"]\n[[3],[1],[2],[],[2],[3],[4],[5,100],[2,100],[],[],[],[]]",
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"categoryTitle": "Algorithms",
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"name": "Stack",
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{
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"lang": "C++",
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"langSlug": "cpp",
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"code": "class CustomStack {\npublic:\n CustomStack(int maxSize) {\n \n }\n \n void push(int x) {\n \n }\n \n int pop() {\n \n }\n \n void increment(int k, int val) {\n \n }\n};\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * CustomStack* obj = new CustomStack(maxSize);\n * obj->push(x);\n * int param_2 = obj->pop();\n * obj->increment(k,val);\n */",
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"__typename": "CodeSnippetNode"
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{
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"lang": "Java",
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"langSlug": "java",
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"code": "class CustomStack {\n\n public CustomStack(int maxSize) {\n \n }\n \n public void push(int x) {\n \n }\n \n public int pop() {\n \n }\n \n public void increment(int k, int val) {\n \n }\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * CustomStack obj = new CustomStack(maxSize);\n * obj.push(x);\n * int param_2 = obj.pop();\n * obj.increment(k,val);\n */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Python",
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"langSlug": "python",
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"code": "class CustomStack(object):\n\n def __init__(self, maxSize):\n \"\"\"\n :type maxSize: int\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: int\n \"\"\"\n \n\n def increment(self, k, val):\n \"\"\"\n :type k: int\n :type val: int\n :rtype: None\n \"\"\"\n \n\n\n# Your CustomStack object will be instantiated and called as such:\n# obj = CustomStack(maxSize)\n# obj.push(x)\n# param_2 = obj.pop()\n# obj.increment(k,val)",
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"__typename": "CodeSnippetNode"
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{
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"lang": "Python3",
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"langSlug": "python3",
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"code": "class CustomStack:\n\n def __init__(self, maxSize: int):\n \n\n def push(self, x: int) -> None:\n \n\n def pop(self) -> int:\n \n\n def increment(self, k: int, val: int) -> None:\n \n\n\n# Your CustomStack object will be instantiated and called as such:\n# obj = CustomStack(maxSize)\n# obj.push(x)\n# param_2 = obj.pop()\n# obj.increment(k,val)",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "C",
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"langSlug": "c",
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"code": "\n\n\ntypedef struct {\n \n} CustomStack;\n\n\nCustomStack* customStackCreate(int maxSize) {\n \n}\n\nvoid customStackPush(CustomStack* obj, int x) {\n \n}\n\nint customStackPop(CustomStack* obj) {\n \n}\n\nvoid customStackIncrement(CustomStack* obj, int k, int val) {\n \n}\n\nvoid customStackFree(CustomStack* obj) {\n \n}\n\n/**\n * Your CustomStack struct will be instantiated and called as such:\n * CustomStack* obj = customStackCreate(maxSize);\n * customStackPush(obj, x);\n \n * int param_2 = customStackPop(obj);\n \n * customStackIncrement(obj, k, val);\n \n * customStackFree(obj);\n*/",
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{
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"lang": "C#",
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"langSlug": "csharp",
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"code": "public class CustomStack {\n\n public CustomStack(int maxSize) {\n \n }\n \n public void Push(int x) {\n \n }\n \n public int Pop() {\n \n }\n \n public void Increment(int k, int val) {\n \n }\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * CustomStack obj = new CustomStack(maxSize);\n * obj.Push(x);\n * int param_2 = obj.Pop();\n * obj.Increment(k,val);\n */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "JavaScript",
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"langSlug": "javascript",
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"code": "/**\n * @param {number} maxSize\n */\nvar CustomStack = function(maxSize) {\n \n};\n\n/** \n * @param {number} x\n * @return {void}\n */\nCustomStack.prototype.push = function(x) {\n \n};\n\n/**\n * @return {number}\n */\nCustomStack.prototype.pop = function() {\n \n};\n\n/** \n * @param {number} k \n * @param {number} val\n * @return {void}\n */\nCustomStack.prototype.increment = function(k, val) {\n \n};\n\n/** \n * Your CustomStack object will be instantiated and called as such:\n * var obj = new CustomStack(maxSize)\n * obj.push(x)\n * var param_2 = obj.pop()\n * obj.increment(k,val)\n */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Ruby",
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"langSlug": "ruby",
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"code": "class CustomStack\n\n=begin\n :type max_size: Integer\n=end\n def initialize(max_size)\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: Integer\n=end\n def pop()\n \n end\n\n\n=begin\n :type k: Integer\n :type val: Integer\n :rtype: Void\n=end\n def increment(k, val)\n \n end\n\n\nend\n\n# Your CustomStack object will be instantiated and called as such:\n# obj = CustomStack.new(max_size)\n# obj.push(x)\n# param_2 = obj.pop()\n# obj.increment(k, val)",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Swift",
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"langSlug": "swift",
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"code": "\nclass CustomStack {\n\n init(_ maxSize: Int) {\n \n }\n \n func push(_ x: Int) {\n \n }\n \n func pop() -> Int {\n \n }\n \n func increment(_ k: Int, _ val: Int) {\n \n }\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * let obj = CustomStack(maxSize)\n * obj.push(x)\n * let ret_2: Int = obj.pop()\n * obj.increment(k, val)\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 CustomStack struct {\n \n}\n\n\nfunc Constructor(maxSize int) CustomStack {\n \n}\n\n\nfunc (this *CustomStack) Push(x int) {\n \n}\n\n\nfunc (this *CustomStack) Pop() int {\n \n}\n\n\nfunc (this *CustomStack) Increment(k int, val int) {\n \n}\n\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * obj := Constructor(maxSize);\n * obj.Push(x);\n * param_2 := obj.Pop();\n * obj.Increment(k,val);\n */",
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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 CustomStack(_maxSize: Int) {\n\n def push(x: Int) {\n \n }\n\n def pop(): Int = {\n \n }\n\n def increment(k: Int, `val`: Int) {\n \n }\n\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * var obj = new CustomStack(maxSize)\n * obj.push(x)\n * var param_2 = obj.pop()\n * obj.increment(k,`val`)\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 CustomStack(maxSize: Int) {\n\n fun push(x: Int) {\n \n }\n\n fun pop(): Int {\n \n }\n\n fun increment(k: Int, `val`: Int) {\n \n }\n\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * var obj = CustomStack(maxSize)\n * obj.push(x)\n * var param_2 = obj.pop()\n * obj.increment(k,`val`)\n */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Rust",
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"langSlug": "rust",
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"code": "struct CustomStack {\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 CustomStack {\n\n fn new(maxSize: i32) -> Self {\n \n }\n \n fn push(&self, x: i32) {\n \n }\n \n fn pop(&self) -> i32 {\n \n }\n \n fn increment(&self, k: i32, val: i32) {\n \n }\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * let obj = CustomStack::new(maxSize);\n * obj.push(x);\n * let ret_2: i32 = obj.pop();\n * obj.increment(k, val);\n */",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "PHP",
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"langSlug": "php",
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"code": "class CustomStack {\n /**\n * @param Integer $maxSize\n */\n function __construct($maxSize) {\n \n }\n \n /**\n * @param Integer $x\n * @return NULL\n */\n function push($x) {\n \n }\n \n /**\n * @return Integer\n */\n function pop() {\n \n }\n \n /**\n * @param Integer $k\n * @param Integer $val\n * @return NULL\n */\n function increment($k, $val) {\n \n }\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * $obj = CustomStack($maxSize);\n * $obj->push($x);\n * $ret_2 = $obj->pop();\n * $obj->increment($k, $val);\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 CustomStack {\n constructor(maxSize: number) {\n\n }\n\n push(x: number): void {\n\n }\n\n pop(): number {\n\n }\n\n increment(k: number, val: number): void {\n\n }\n}\n\n/**\n * Your CustomStack object will be instantiated and called as such:\n * var obj = new CustomStack(maxSize)\n * obj.push(x)\n * var param_2 = obj.pop()\n * obj.increment(k,val)\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 custom-stack%\n (class object%\n (super-new)\n\n ; max-size : exact-integer?\n (init-field\n max-size)\n \n ; push : exact-integer? -> void?\n (define/public (push x)\n\n )\n ; pop : -> exact-integer?\n (define/public (pop)\n\n )\n ; increment : exact-integer? exact-integer? -> void?\n (define/public (increment k val)\n\n )))\n\n;; Your custom-stack% object will be instantiated and called as such:\n;; (define obj (new custom-stack% [max-size max-size]))\n;; (send obj push x)\n;; (define param_2 (send obj pop))\n;; (send obj increment k val)",
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"__typename": "CodeSnippetNode"
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"lang": "Erlang",
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"langSlug": "erlang",
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"code": "-spec custom_stack_init_(MaxSize :: integer()) -> any().\ncustom_stack_init_(MaxSize) ->\n .\n\n-spec custom_stack_push(X :: integer()) -> any().\ncustom_stack_push(X) ->\n .\n\n-spec custom_stack_pop() -> integer().\ncustom_stack_pop() ->\n .\n\n-spec custom_stack_increment(K :: integer(), Val :: integer()) -> any().\ncustom_stack_increment(K, Val) ->\n .\n\n\n%% Your functions will be called as such:\n%% custom_stack_init_(MaxSize),\n%% custom_stack_push(X),\n%% Param_2 = custom_stack_pop(),\n%% custom_stack_increment(K, Val),\n\n%% custom_stack_init_ will be called before every test case, in which you can do some necessary initializations.",
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"lang": "Elixir",
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"langSlug": "elixir",
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"code": "defmodule CustomStack do\n @spec init_(max_size :: integer) :: any\n def init_(max_size) do\n\n end\n\n @spec push(x :: integer) :: any\n def push(x) do\n\n end\n\n @spec pop() :: integer\n def pop() do\n\n end\n\n @spec increment(k :: integer, val :: integer) :: any\n def increment(k, val) do\n\n end\nend\n\n# Your functions will be called as such:\n# CustomStack.init_(max_size)\n# CustomStack.push(x)\n# param_2 = CustomStack.pop()\n# CustomStack.increment(k, val)\n\n# CustomStack.init_ will be called before every test case, in which you can do some necessary initializations.",
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"__typename": "CodeSnippetNode"
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"hints": [
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"Use an array to represent the stack. Push will add new integer to the array. Pop removes the last element in the array and increment will add val to the first k elements of the array.",
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"This solution run in O(1) per push and pop and O(k) per increment."
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],
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"solution": null,
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"sampleTestCase": "[\"CustomStack\",\"push\",\"push\",\"pop\",\"push\",\"push\",\"push\",\"increment\",\"increment\",\"pop\",\"pop\",\"pop\",\"pop\"]\n[[3],[1],[2],[],[2],[3],[4],[5,100],[2,100],[],[],[],[]]",
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"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\"]}",
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