{ "data": { "question": { "questionId": "3497", "questionFrontendId": "3313", "categoryTitle": "Algorithms", "boundTopicId": 2942753, "title": "Find the Last Marked Nodes in Tree", "titleSlug": "find-the-last-marked-nodes-in-tree", "content": null, "translatedTitle": null, "translatedContent": null, "isPaidOnly": true, "difficulty": "Hard", "likes": 0, "dislikes": 0, "isLiked": null, "similarQuestions": "[{\"title\": \"Minimum Time to Visit Disappearing Nodes\", \"titleSlug\": \"minimum-time-to-visit-disappearing-nodes\", \"difficulty\": \"Medium\", \"translatedTitle\": \"\\u8bbf\\u95ee\\u6d88\\u5931\\u8282\\u70b9\\u7684\\u6700\\u5c11\\u65f6\\u95f4\", \"isPaidOnly\": false}, {\"title\": \"Time Taken to Mark All Nodes\", \"titleSlug\": \"time-taken-to-mark-all-nodes\", \"difficulty\": \"Hard\", \"translatedTitle\": \"\\u6807\\u8bb0\\u6240\\u6709\\u8282\\u70b9\\u9700\\u8981\\u7684\\u65f6\\u95f4\", \"isPaidOnly\": false}]", "contributors": [], "langToValidPlayground": null, "topicTags": [ { "name": "Tree", "slug": "tree", "translatedName": "树", "__typename": "TopicTagNode" }, { "name": "Depth-First Search", "slug": "depth-first-search", "translatedName": "深度优先搜索", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": null, "stats": "{\"totalAccepted\": \"29\", \"totalSubmission\": \"42\", \"totalAcceptedRaw\": 29, \"totalSubmissionRaw\": 42, \"acRate\": \"69.0%\"}", "hints": [ "We need to calculate the height of tree when rooted at each node.", "Find a diameter using two DFS.", "The farthest node from each node must be one of the endpoints of the diameter.", "The last marked node will be one of the end of the diameter, whichever is more distant." ], "solution": null, "status": null, "sampleTestCase": "[[0,1],[0,2]]", "metaData": "{\n \"name\": \"lastMarkedNodes\",\n \"params\": [\n {\n \"name\": \"edges\",\n \"type\": \"integer[][]\"\n }\n ],\n \"return\": {\n \"type\": \"integer[]\"\n }\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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