{ "data": { "question": { "questionId": "914", "questionFrontendId": "497", "categoryTitle": "Algorithms", "boundTopicId": 1793, "title": "Random Point in Non-overlapping Rectangles", "titleSlug": "random-point-in-non-overlapping-rectangles", "content": "

You are given an array of non-overlapping axis-aligned rectangles rects where rects[i] = [ai, bi, xi, yi] indicates that (ai, bi) is the bottom-left corner point of the ith rectangle and (xi, yi) is the top-right corner point of the ith rectangle. Design an algorithm to pick a random integer point inside the space covered by one of the given rectangles. A point on the perimeter of a rectangle is included in the space covered by the rectangle.

\n\n

Any integer point inside the space covered by one of the given rectangles should be equally likely to be returned.

\n\n

Note that an integer point is a point that has integer coordinates.

\n\n

Implement the Solution class:

\n\n\n\n

 

\n

Example 1:

\n\"\"\n
\nInput\n["Solution", "pick", "pick", "pick", "pick", "pick"]\n[[[[-2, -2, 1, 1], [2, 2, 4, 6]]], [], [], [], [], []]\nOutput\n[null, [1, -2], [1, -1], [-1, -2], [-2, -2], [0, 0]]\n\nExplanation\nSolution solution = new Solution([[-2, -2, 1, 1], [2, 2, 4, 6]]);\nsolution.pick(); // return [1, -2]\nsolution.pick(); // return [1, -1]\nsolution.pick(); // return [-1, -2]\nsolution.pick(); // return [-2, -2]\nsolution.pick(); // return [0, 0]\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "非重叠矩形中的随机点", "translatedContent": "

给定一个由非重叠的轴对齐矩形的数组 rects ，其中 rects[i] = [ai, bi, xi, yi] 表示 (ai, bi) 是第 i 个矩形的左下角点，(xi, yi) 是第 i 个矩形的右上角点。设计一个算法来随机挑选一个被某一矩形覆盖的整数点。矩形周长上的点也算做是被矩形覆盖。所有满足要求的点必须等概率被返回。

\n\n

在给定的矩形覆盖的空间内的任何整数点都有可能被返回。

\n\n

请注意 ，整数点是具有整数坐标的点。

\n\n

实现 Solution 类:

\n\n\n\n
    \n
\n\n

 

\n\n

示例 1：

\n\n

\n\n
\n输入: \n[\"Solution\", \"pick\", \"pick\", \"pick\", \"pick\", \"pick\"]\n[[[[-2, -2, 1, 1], [2, 2, 4, 6]]], [], [], [], [], []]\n输出: \n[null, [1, -2], [1, -1], [-1, -2], [-2, -2], [0, 0]]\n\n解释：\nSolution solution = new Solution([[-2, -2, 1, 1], [2, 2, 4, 6]]);\nsolution.pick(); // 返回 [1, -2]\nsolution.pick(); // 返回 [1, -1]\nsolution.pick(); // 返回 [-1, -2]\nsolution.pick(); // 返回 [-2, -2]\nsolution.pick(); // 返回 [0, 0]
\n\n

 

\n\n

提示：

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{ "lang": "Python3", "langSlug": "python3", "code": "class Solution:\n\n def __init__(self, rects: List[List[int]]):\n\n\n def pick(self) -> List[int]:\n\n\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution(rects)\n# param_1 = obj.pick()", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "\n\n\ntypedef struct {\n \n} Solution;\n\n\nSolution* solutionCreate(int** rects, int rectsSize, int* rectsColSize) {\n \n}\n\nint* solutionPick(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(rects, rectsSize, rectsColSize);\n * int* param_1 = solutionPick(obj, retSize);\n \n * solutionFree(obj);\n*/", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class Solution {\n\n public Solution(int[][] rects) {\n\n }\n \n public int[] Pick() {\n\n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution obj = new Solution(rects);\n * int[] param_1 = obj.Pick();\n */", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * @param {number[][]} rects\n */\nvar Solution = function(rects) {\n\n};\n\n/**\n * @return {number[]}\n */\nSolution.prototype.pick = function() {\n\n};\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(rects)\n * var param_1 = obj.pick()\n */", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "class Solution {\n constructor(rects: number[][]) {\n \n }\n\n pick(): number[] {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(rects)\n * var param_1 = obj.pick()\n */", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class Solution {\n /**\n * @param Integer[][] $rects\n */\n function __construct($rects) {\n\n }\n\n /**\n * @return Integer[]\n */\n function pick() {\n\n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * $obj = Solution($rects);\n * $ret_1 = $obj->pick();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "\nclass Solution {\n\n init(_ rects: [[Int]]) {\n\n }\n \n func pick() -> [Int] {\n\n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * let obj = Solution(rects)\n * let ret_1: [Int] = obj.pick()\n */", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class Solution(rects: Array) {\n\n fun pick(): IntArray {\n\n }\n\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = Solution(rects)\n * var param_1 = obj.pick()\n */", "__typename": "CodeSnippetNode" }, { "lang": "Dart", "langSlug": "dart", "code": "class Solution {\n\n Solution(List> rects) {\n \n }\n \n List pick() {\n \n }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution obj = Solution(rects);\n * List param1 = obj.pick();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "type Solution struct {\n\n}\n\n\nfunc Constructor(rects [][]int) Solution {\n\n}\n\n\nfunc (this *Solution) Pick() []int {\n\n}\n\n\n/**\n * Your Solution object will be instantiated and called as such:\n * obj := Constructor(rects);\n * param_1 := obj.Pick();\n */", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "class Solution\n\n=begin\n :type rects: Integer[][]\n=end\n def initialize(rects)\n\n end\n\n\n=begin\n :rtype: Integer[]\n=end\n def pick()\n\n end\n\n\nend\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution.new(rects)\n# param_1 = obj.pick()", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "class Solution(_rects: 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