mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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177 lines
31 KiB
JSON
177 lines
31 KiB
JSON
{
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"question": {
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"questionId": "1497",
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"questionFrontendId": "1381",
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"categoryTitle": "Algorithms",
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"boundTopicId": 146717,
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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": "设计一个支持增量操作的栈",
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"translatedContent": "<p>请你设计一个支持下述操作的栈。</p>\n\n<p>实现自定义栈类 <code>CustomStack</code> :</p>\n\n<ul>\n\t<li><code>CustomStack(int maxSize)</code>:用 <code>maxSize</code> 初始化对象,<code>maxSize</code> 是栈中最多能容纳的元素数量,栈在增长到 <code>maxSize</code> 之后则不支持 <code>push</code> 操作。</li>\n\t<li><code>void push(int x)</code>:如果栈还未增长到 <code>maxSize</code> ,就将 <code>x</code> 添加到栈顶。</li>\n\t<li><code>int pop()</code>:弹出栈顶元素,并返回栈顶的值,或栈为空时返回 <strong>-1</strong> 。</li>\n\t<li><code>void inc(int k, int val)</code>:栈底的 <code>k</code> 个元素的值都增加 <code>val</code> 。如果栈中元素总数小于 <code>k</code> ,则栈中的所有元素都增加 <code>val</code> 。</li>\n</ul>\n\n<p> </p>\n\n<p><strong>示例:</strong></p>\n\n<pre><strong>输入:</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>输出:</strong>\n[null,null,null,2,null,null,null,null,null,103,202,201,-1]\n<strong>解释:</strong>\nCustomStack customStack = new CustomStack(3); // 栈是空的 []\ncustomStack.push(1); // 栈变为 [1]\ncustomStack.push(2); // 栈变为 [1, 2]\ncustomStack.pop(); // 返回 2 --> 返回栈顶值 2,栈变为 [1]\ncustomStack.push(2); // 栈变为 [1, 2]\ncustomStack.push(3); // 栈变为 [1, 2, 3]\ncustomStack.push(4); // 栈仍然是 [1, 2, 3],不能添加其他元素使栈大小变为 4\ncustomStack.increment(5, 100); // 栈变为 [101, 102, 103]\ncustomStack.increment(2, 100); // 栈变为 [201, 202, 103]\ncustomStack.pop(); // 返回 103 --> 返回栈顶值 103,栈变为 [201, 202]\ncustomStack.pop(); // 返回 202 --> 返回栈顶值 202,栈变为 [201]\ncustomStack.pop(); // 返回 201 --> 返回栈顶值 201,栈变为 []\ncustomStack.pop(); // 返回 -1 --> 栈为空,返回 -1\n</pre>\n\n<p> </p>\n\n<p><strong>提示:</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>每种方法 <code>increment</code>,<code>push</code> 以及 <code>pop</code> 分别最多调用 <code>1000</code> 次</li>\n</ul>\n",
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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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"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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"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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"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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"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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"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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"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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"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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"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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"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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