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D9PW8w.json
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{
"data": {
"question": {
"questionId": "1000477",
"questionFrontendId": "LCP 62",
"categoryTitle": "Algorithms",
"boundTopicId": 1845920,
"title": "交通枢纽",
"titleSlug": "D9PW8w",
"content": "",
"translatedTitle": "交通枢纽",
"translatedContent": "为了缓解「力扣嘉年华」期间的人流压力，组委会在活动期间开设了一些交通专线。`path[i] = [a, b]` 表示有一条从地点 `a`通往地点 `b` 的 **单向** 交通专线。\n若存在一个地点，满足以下要求，我们则称之为 **交通枢纽**：\n- 所有地点（除自身外）均有一条 **单向** 专线 **直接** 通往该地点；\n- 该地点不存在任何 **通往其他地点** 的单向专线。\n\n请返回交通专线的 **交通枢纽**。若不存在，则返回 `-1`。\n\n**注意：**\n- 对于任意一个地点，至少被一条专线连通。\n\n**示例 1：**\n>输入：`path = [[0,1],[0,3],[1,3],[2,0],[2,3]]`\n>\n>输出：`3`\n>\n>解释：如下图所示：\n> 地点 `0,1,2` 各有一条通往地点 `3` 的交通专线，\n> 且地点 `3` 不存在任何**通往其他地点**的交通专线。\n>{:width=200px}\n\n\n**示例 2：**\n>输入：`path = [[0,3],[1,0],[1,3],[2,0],[3,0],[3,2]]`\n>\n>输出：`-1`\n>\n>解释：如下图所示：不存在满足 **交通枢纽** 的地点。\n>{:width=200px}\n\n**提示：**\n- `1 <= path.length <= 1000`\n- `0 <= path[i][0], path[i][1] <= 1000`\n- `path[i][0]` 与 `path[i][1]` 不相等",
"isPaidOnly": false,
"difficulty": "Medium",
"likes": 3,
"dislikes": 0,
"isLiked": null,
"similarQuestions": "[]",
"contributors": [
{
"username": "LeetCode",
"profileUrl": "/u/leetcode",
"avatarUrl": "https://assets.leetcode.cn/aliyun-lc-upload/uploaded_files/2021/03/73c9f099-abbe-4d94-853f-f8abffd459cd/leetcode.png",
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"topicTags": [],
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"codeSnippets": [
{
"lang": "C++",
"langSlug": "cpp",
"code": "class Solution {\npublic:\n int transportationHub(vector<vector<int>>& path) {\n\n }\n};",
"__typename": "CodeSnippetNode"
},
{
"lang": "Java",
"langSlug": "java",
"code": "class Solution {\n public int transportationHub(int[][] path) {\n\n }\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "Python",
"langSlug": "python",
"code": "class Solution(object):\n def transportationHub(self, path):\n \"\"\"\n :type path: List[List[int]]\n :rtype: int\n \"\"\"",
"__typename": "CodeSnippetNode"
},
{
"lang": "Python3",
"langSlug": "python3",
"code": "class Solution:\n def transportationHub(self, path: List[List[int]]) -> int:",
"__typename": "CodeSnippetNode"
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{
"lang": "C",
"langSlug": "c",
"code": "\n\nint transportationHub(int** path, int pathSize, int* pathColSize){\n\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "C#",
"langSlug": "csharp",
"code": "public class Solution {\n public int TransportationHub(int[][] path) {\n\n }\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "JavaScript",
"langSlug": "javascript",
"code": "/**\n * @param {number[][]} path\n * @return {number}\n */\nvar transportationHub = function(path) {\n\n};",
"__typename": "CodeSnippetNode"
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{
"lang": "Ruby",
"langSlug": "ruby",
"code": "# @param {Integer[][]} path\n# @return {Integer}\ndef transportation_hub(path)\n\nend",
"__typename": "CodeSnippetNode"
},
{
"lang": "Swift",
"langSlug": "swift",
"code": "class Solution {\n func transportationHub(_ path: [[Int]]) -> Int {\n\n }\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "Go",
"langSlug": "golang",
"code": "func transportationHub(path [][]int) int {\n\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "Scala",
"langSlug": "scala",
"code": "object Solution {\n def transportationHub(path: Array[Array[Int]]): Int = {\n\n }\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "Kotlin",
"langSlug": "kotlin",
"code": "class Solution {\n fun transportationHub(path: Array<IntArray>): Int {\n\n }\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "Rust",
"langSlug": "rust",
"code": "impl Solution {\n pub fn transportation_hub(path: Vec<Vec<i32>>) -> i32 {\n\n }\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "PHP",
"langSlug": "php",
"code": "class Solution {\n\n /**\n * @param Integer[][] $path\n * @return Integer\n */\n function transportationHub($path) {\n\n }\n}",
"__typename": "CodeSnippetNode"
},
{
"lang": "TypeScript",
"langSlug": "typescript",
"code": "function transportationHub(path: number[][]): number {\n\n};",
"__typename": "CodeSnippetNode"
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{
"lang": "Racket",
"langSlug": "racket",
"code": "(define/contract (transportation-hub path)\n (-> (listof (listof exact-integer?)) exact-integer?)\n\n )",
"__typename": "CodeSnippetNode"
},
{
"lang": "Erlang",
"langSlug": "erlang",
"code": "-spec transportation_hub(Path :: [[integer()]]) -> integer().\ntransportation_hub(Path) ->\n .",
"__typename": "CodeSnippetNode"
},
{
"lang": "Elixir",
"langSlug": "elixir",
"code": "defmodule Solution do\n @spec transportation_hub(path :: [[integer]]) :: integer\n def transportation_hub(path) do\n\n end\nend",
"__typename": "CodeSnippetNode"
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{
"lang": "Dart",
"langSlug": "dart",
"code": "class Solution {\n int transportationHub(List<List<int>> path) {\n\n }\n}",
"__typename": "CodeSnippetNode"
}
],
"stats": "{\"totalAccepted\": \"4.4K\", \"totalSubmission\": \"7.3K\", \"totalAcceptedRaw\": 4356, \"totalSubmissionRaw\": 7304, \"acRate\": \"59.6%\"}",
"hints": [],
"solution": null,
"status": null,
"sampleTestCase": "[[0,1],[0,3],[1,3],[2,0],[2,3]]",
"metaData": "{\"name\": \"transportationHub\", \"params\": [{\"name\": \"path\", \"type\": \"integer[][]\"}], \"return\": {\"type\": \"integer\"}}",
"judgerAvailable": true,
"judgeType": "large",
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