mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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186 lines
18 KiB
JSON
186 lines
18 KiB
JSON
{
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"data": {
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"question": {
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"questionId": "1106",
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"questionFrontendId": "1036",
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"boundTopicId": null,
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"title": "Escape a Large Maze",
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"titleSlug": "escape-a-large-maze",
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"content": "<p>There is a 1 million by 1 million grid on an XY-plane, and the coordinates of each grid square are <code>(x, y)</code>.</p>\n\n<p>We start at the <code>source = [s<sub>x</sub>, s<sub>y</sub>]</code> square and want to reach the <code>target = [t<sub>x</sub>, t<sub>y</sub>]</code> square. There is also an array of <code>blocked</code> squares, where each <code>blocked[i] = [x<sub>i</sub>, y<sub>i</sub>]</code> represents a blocked square with coordinates <code>(x<sub>i</sub>, y<sub>i</sub>)</code>.</p>\n\n<p>Each move, we can walk one square north, east, south, or west if the square is <strong>not</strong> in the array of <code>blocked</code> squares. We are also not allowed to walk outside of the grid.</p>\n\n<p>Return <code>true</code><em> if and only if it is possible to reach the </em><code>target</code><em> square from the </em><code>source</code><em> square through a sequence of valid moves</em>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> blocked = [[0,1],[1,0]], source = [0,0], target = [0,2]\n<strong>Output:</strong> false\n<strong>Explanation:</strong> The target square is inaccessible starting from the source square because we cannot move.\nWe cannot move north or east because those squares are blocked.\nWe cannot move south or west because we cannot go outside of the grid.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> blocked = [], source = [0,0], target = [999999,999999]\n<strong>Output:</strong> true\n<strong>Explanation:</strong> Because there are no blocked cells, it is possible to reach the target square.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>0 <= blocked.length <= 200</code></li>\n\t<li><code>blocked[i].length == 2</code></li>\n\t<li><code>0 <= x<sub>i</sub>, y<sub>i</sub> < 10<sup>6</sup></code></li>\n\t<li><code>source.length == target.length == 2</code></li>\n\t<li><code>0 <= s<sub>x</sub>, s<sub>y</sub>, t<sub>x</sub>, t<sub>y</sub> < 10<sup>6</sup></code></li>\n\t<li><code>source != target</code></li>\n\t<li>It is guaranteed that <code>source</code> and <code>target</code> are not blocked.</li>\n</ul>\n",
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"translatedTitle": null,
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"isPaidOnly": false,
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"difficulty": "Hard",
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"likes": 645,
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"dislikes": 166,
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"similarQuestions": "[]",
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"exampleTestcases": "[[0,1],[1,0]]\n[0,0]\n[0,2]\n[]\n[0,0]\n[999999,999999]",
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"categoryTitle": "Algorithms",
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"contributors": [],
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"topicTags": [
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"name": "Array",
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"name": "Hash Table",
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"name": "Depth-First Search",
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"name": "Breadth-First Search",
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"lang": "C++",
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"langSlug": "cpp",
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"code": "class Solution {\npublic:\n bool isEscapePossible(vector<vector<int>>& blocked, vector<int>& source, vector<int>& target) {\n \n }\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 Solution {\n public boolean isEscapePossible(int[][] blocked, int[] source, int[] target) {\n \n }\n}",
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{
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"lang": "Python",
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"langSlug": "python",
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"code": "class Solution(object):\n def isEscapePossible(self, blocked, source, target):\n \"\"\"\n :type blocked: List[List[int]]\n :type source: List[int]\n :type target: List[int]\n :rtype: bool\n \"\"\"\n ",
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"lang": "Python3",
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"langSlug": "python3",
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"code": "class Solution:\n def isEscapePossible(self, blocked: List[List[int]], source: List[int], target: List[int]) -> bool:\n ",
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},
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"lang": "C",
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"langSlug": "c",
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"code": "bool isEscapePossible(int** blocked, int blockedSize, int* blockedColSize, int* source, int sourceSize, int* target, int targetSize) {\n \n}",
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"lang": "C#",
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"langSlug": "csharp",
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"code": "public class Solution {\n public bool IsEscapePossible(int[][] blocked, int[] source, int[] target) {\n \n }\n}",
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"__typename": "CodeSnippetNode"
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"lang": "JavaScript",
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"langSlug": "javascript",
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"code": "/**\n * @param {number[][]} blocked\n * @param {number[]} source\n * @param {number[]} target\n * @return {boolean}\n */\nvar isEscapePossible = function(blocked, source, target) {\n \n};",
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"lang": "TypeScript",
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"code": "function isEscapePossible(blocked: number[][], source: number[], target: number[]): boolean {\n \n};",
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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 /**\n * @param Integer[][] $blocked\n * @param Integer[] $source\n * @param Integer[] $target\n * @return Boolean\n */\n function isEscapePossible($blocked, $source, $target) {\n \n }\n}",
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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": "class Solution {\n func isEscapePossible(_ blocked: [[Int]], _ source: [Int], _ target: [Int]) -> Bool {\n \n }\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 Solution {\n fun isEscapePossible(blocked: Array<IntArray>, source: IntArray, target: IntArray): Boolean {\n \n }\n}",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Dart",
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"langSlug": "dart",
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"code": "class Solution {\n bool isEscapePossible(List<List<int>> blocked, List<int> source, List<int> target) {\n \n }\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": "func isEscapePossible(blocked [][]int, source []int, target []int) bool {\n \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": "# @param {Integer[][]} blocked\n# @param {Integer[]} source\n# @param {Integer[]} target\n# @return {Boolean}\ndef is_escape_possible(blocked, source, target)\n \nend",
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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": "object Solution {\n def isEscapePossible(blocked: Array[Array[Int]], source: Array[Int], target: Array[Int]): Boolean = {\n \n }\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": "impl Solution {\n pub fn is_escape_possible(blocked: Vec<Vec<i32>>, source: Vec<i32>, target: Vec<i32>) -> bool {\n \n }\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/contract (is-escape-possible blocked source target)\n (-> (listof (listof exact-integer?)) (listof exact-integer?) (listof exact-integer?) boolean?)\n )",
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{
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"lang": "Erlang",
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"langSlug": "erlang",
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"code": "-spec is_escape_possible(Blocked :: [[integer()]], Source :: [integer()], Target :: [integer()]) -> boolean().\nis_escape_possible(Blocked, Source, Target) ->\n .",
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"__typename": "CodeSnippetNode"
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},
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{
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"lang": "Elixir",
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"langSlug": "elixir",
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"code": "defmodule Solution do\n @spec is_escape_possible(blocked :: [[integer]], source :: [integer], target :: [integer]) :: boolean\n def is_escape_possible(blocked, source, target) do\n \n end\nend",
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"__typename": "CodeSnippetNode"
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}
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],
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"hints": [
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"If we become stuck, there's either a loop around the source or around the target.",
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"If there is a loop around say, the source, what is the maximum number of squares it can have?"
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],
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"solution": null,
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"status": null,
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"sampleTestCase": "[[0,1],[1,0]]\n[0,0]\n[0,2]",
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"metaData": "{\r\n \"name\": \"isEscapePossible\",\r\n \"params\": [\r\n {\r\n \"name\": \"blocked\",\r\n \"type\": \"integer[][]\"\r\n },\r\n {\r\n \"name\": \"source\",\r\n \"type\": \"integer[]\"\r\n },\r\n {\r\n \"name\": \"target\",\r\n \"type\": \"integer[]\"\r\n }\r\n ],\r\n \"return\": {\r\n \"type\": \"boolean\"\r\n }\r\n}\r\n",
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"envInfo": "{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 20 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>. 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