mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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190 lines
23 KiB
JSON
190 lines
23 KiB
JSON
{
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"question": {
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"questionId": "915",
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"questionFrontendId": "478",
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"title": "Generate Random Point in a Circle",
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"titleSlug": "generate-random-point-in-a-circle",
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"content": "<p>Given the radius and the position of the center of a circle, implement the function <code>randPoint</code> which generates a uniform random point inside the circle.</p>\n\n<p>Implement the <code>Solution</code> class:</p>\n\n<ul>\n\t<li><code>Solution(double radius, double x_center, double y_center)</code> initializes the object with the radius of the circle <code>radius</code> and the position of the center <code>(x_center, y_center)</code>.</li>\n\t<li><code>randPoint()</code> returns a random point inside the circle. A point on the circumference of the circle is considered to be in the circle. The answer is returned as an array <code>[x, y]</code>.</li>\n</ul>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n["Solution", "randPoint", "randPoint", "randPoint"]\n[[1.0, 0.0, 0.0], [], [], []]\n<strong>Output</strong>\n[null, [-0.02493, -0.38077], [0.82314, 0.38945], [0.36572, 0.17248]]\n\n<strong>Explanation</strong>\nSolution solution = new Solution(1.0, 0.0, 0.0);\nsolution.randPoint(); // return [-0.02493, -0.38077]\nsolution.randPoint(); // return [0.82314, 0.38945]\nsolution.randPoint(); // return [0.36572, 0.17248]\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>0 < radius <= 10<sup>8</sup></code></li>\n\t<li><code>-10<sup>7</sup> <= x_center, y_center <= 10<sup>7</sup></code></li>\n\t<li>At most <code>3 * 10<sup>4</sup></code> calls will be made to <code>randPoint</code>.</li>\n</ul>\n",
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"difficulty": "Medium",
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"lang": "C++",
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"langSlug": "cpp",
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"code": "class Solution {\npublic:\n Solution(double radius, double x_center, double y_center) {\n \n }\n \n vector<double> randPoint() {\n \n }\n};\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution* obj = new Solution(radius, x_center, y_center);\n * vector<double> param_1 = obj->randPoint();\n */",
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"lang": "Java",
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"langSlug": "java",
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"code": "class Solution {\n\n public Solution(double radius, double x_center, double y_center) {\n \n }\n \n public double[] randPoint() {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution obj = new Solution(radius, x_center, y_center);\n * double[] param_1 = obj.randPoint();\n */",
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"lang": "Python",
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"langSlug": "python",
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"code": "class Solution(object):\n\n def __init__(self, radius, x_center, y_center):\n \"\"\"\n :type radius: float\n :type x_center: float\n :type y_center: float\n \"\"\"\n \n\n def randPoint(self):\n \"\"\"\n :rtype: List[float]\n \"\"\"\n \n\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution(radius, x_center, y_center)\n# param_1 = obj.randPoint()",
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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 Solution:\n\n def __init__(self, radius: float, x_center: float, y_center: float):\n \n\n def randPoint(self) -> List[float]:\n \n\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution(radius, x_center, y_center)\n# param_1 = obj.randPoint()",
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"lang": "C",
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"langSlug": "c",
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"code": "\n\n\ntypedef struct {\n \n} Solution;\n\n\nSolution* solutionCreate(double radius, double x_center, double y_center) {\n \n}\n\ndouble* solutionRandPoint(Solution* obj, int* retSize) {\n \n}\n\nvoid solutionFree(Solution* obj) {\n \n}\n\n/**\n * Your Solution struct will be instantiated and called as such:\n * Solution* obj = solutionCreate(radius, x_center, y_center);\n * double* param_1 = solutionRandPoint(obj, retSize);\n \n * solutionFree(obj);\n*/",
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"lang": "C#",
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"langSlug": "csharp",
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"code": "public class Solution {\n\n public Solution(double radius, double x_center, double y_center) {\n \n }\n \n public double[] RandPoint() {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution obj = new Solution(radius, x_center, y_center);\n * double[] param_1 = obj.RandPoint();\n */",
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"lang": "JavaScript",
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"langSlug": "javascript",
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"code": "/**\n * @param {number} radius\n * @param {number} x_center\n * @param {number} y_center\n */\nvar Solution = function(radius, x_center, y_center) {\n \n};\n\n/**\n * @return {number[]}\n */\nSolution.prototype.randPoint = function() {\n \n};\n\n/** \n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(radius, x_center, y_center)\n * var param_1 = obj.randPoint()\n */",
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"__typename": "CodeSnippetNode"
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"lang": "TypeScript",
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"langSlug": "typescript",
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"code": "class Solution {\n constructor(radius: number, x_center: number, y_center: number) {\n \n }\n\n randPoint(): number[] {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(radius, x_center, y_center)\n * var param_1 = obj.randPoint()\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 Solution {\n /**\n * @param Float $radius\n * @param Float $x_center\n * @param Float $y_center\n */\n function __construct($radius, $x_center, $y_center) {\n \n }\n \n /**\n * @return Float[]\n */\n function randPoint() {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * $obj = Solution($radius, $x_center, $y_center);\n * $ret_1 = $obj->randPoint();\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 Solution {\n\n init(_ radius: Double, _ x_center: Double, _ y_center: Double) {\n \n }\n \n func randPoint() -> [Double] {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * let obj = Solution(radius, x_center, y_center)\n * let ret_1: [Double] = obj.randPoint()\n */",
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{
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"lang": "Kotlin",
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"langSlug": "kotlin",
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"code": "class Solution(radius: Double, x_center: Double, y_center: Double) {\n\n fun randPoint(): DoubleArray {\n \n }\n\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = Solution(radius, x_center, y_center)\n * var param_1 = obj.randPoint()\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 Solution {\n\n Solution(double radius, double x_center, double y_center) {\n \n }\n \n List<double> randPoint() {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution obj = Solution(radius, x_center, y_center);\n * List<double> param1 = obj.randPoint();\n */",
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"__typename": "CodeSnippetNode"
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{
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"lang": "Go",
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"langSlug": "golang",
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"code": "type Solution struct {\n \n}\n\n\nfunc Constructor(radius float64, x_center float64, y_center float64) Solution {\n \n}\n\n\nfunc (this *Solution) RandPoint() []float64 {\n \n}\n\n\n/**\n * Your Solution object will be instantiated and called as such:\n * obj := Constructor(radius, x_center, y_center);\n * param_1 := obj.RandPoint();\n */",
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"lang": "Ruby",
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"langSlug": "ruby",
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"code": "class Solution\n\n=begin\n :type radius: Float\n :type x_center: Float\n :type y_center: Float\n=end\n def initialize(radius, x_center, y_center)\n \n end\n\n\n=begin\n :rtype: Float[]\n=end\n def rand_point()\n \n end\n\n\nend\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution.new(radius, x_center, y_center)\n# param_1 = obj.rand_point()",
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"code": "class Solution(_radius: Double, _x_center: Double, _y_center: Double) {\n\n def randPoint(): Array[Double] = {\n \n }\n\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(radius, x_center, y_center)\n * var param_1 = obj.randPoint()\n */",
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"lang": "Rust",
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"code": "struct Solution {\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 Solution {\n\n fn new(radius: f64, x_center: f64, y_center: f64) -> Self {\n \n }\n \n fn rand_point(&self) -> Vec<f64> {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * let obj = Solution::new(radius, x_center, y_center);\n * let ret_1: Vec<f64> = obj.rand_point();\n */",
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"code": "(define solution%\n (class object%\n (super-new)\n \n ; radius : flonum?\n ; x_center : flonum?\n ; y_center : flonum?\n (init-field\n radius\n x_center\n y_center)\n \n ; rand-point : -> (listof flonum?)\n (define/public (rand-point)\n )))\n\n;; Your solution% object will be instantiated and called as such:\n;; (define obj (new solution% [radius radius] [x_center x_center] [y_center y_center]))\n;; (define param_1 (send obj rand-point))",
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"code": "-spec solution_init_(Radius :: float(), X_center :: float(), Y_center :: float()) -> any().\nsolution_init_(Radius, X_center, Y_center) ->\n .\n\n-spec solution_rand_point() -> [float()].\nsolution_rand_point() ->\n .\n\n\n%% Your functions will be called as such:\n%% solution_init_(Radius, X_center, Y_center),\n%% Param_1 = solution_rand_point(),\n\n%% solution_init_ will be called before every test case, in which you can do some necessary initializations.",
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"code": "defmodule Solution do\n @spec init_(radius :: float, x_center :: float, y_center :: float) :: any\n def init_(radius, x_center, y_center) do\n \n end\n\n @spec rand_point() :: [float]\n def rand_point() do\n \n end\nend\n\n# Your functions will be called as such:\n# Solution.init_(radius, x_center, y_center)\n# param_1 = Solution.rand_point()\n\n# Solution.init_ will be called before every test case, in which you can do some necessary initializations.",
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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>. 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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://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></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 5.3.0 version of <a href=\\\"https://github.com/datastructures-js/priority-queue/tree/fb4fdb984834421279aeb081df7af624d17c2a03\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and 4.2.1 version of <a href=\\\"https://github.com/datastructures-js/queue/tree/e63563025a5a805aa16928cb53bcd517bfea9230\\\" 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 1.21</code></p>\\r\\n<p>Support <a href=\\\"https://github.com/emirpasic/gods/tree/v1.18.1\\\" target=\\\"_blank\\\">https://godoc.org/github.com/emirpasic/gods@v1.18.1</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 1.9.0</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 5.1.6, 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 ES2022 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 25.0\"], \"elixir\": [\"Elixir\", \"Elixir 1.13.4 with Erlang/OTP 25.0\"], \"dart\": [\"Dart\", \"<p>Dart 2.17.3</p>\\r\\n\\r\\n<p>Your code will be run directly without compiling</p>\"]}",
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