{ "data": { "question": { "questionId": "1949", "questionFrontendId": "1804", "categoryTitle": "Algorithms", "boundTopicId": 678680, "title": "Implement Trie II (Prefix Tree)", "titleSlug": "implement-trie-ii-prefix-tree", "content": null, "translatedTitle": "实现 Trie （前缀树） II", "translatedContent": null, "isPaidOnly": true, "difficulty": "Medium", "likes": 23, "dislikes": 0, "isLiked": null, "similarQuestions": "[{\"title\": \"Implement Trie (Prefix Tree)\", \"titleSlug\": \"implement-trie-prefix-tree\", \"difficulty\": \"Medium\", \"translatedTitle\": \"\\u5b9e\\u73b0 Trie (\\u524d\\u7f00\\u6811)\", \"isPaidOnly\": false}, {\"title\": \"Encrypt and Decrypt Strings\", \"titleSlug\": \"encrypt-and-decrypt-strings\", \"difficulty\": \"Hard\", \"translatedTitle\": \"\\u52a0\\u5bc6\\u89e3\\u5bc6\\u5b57\\u7b26\\u4e32\", \"isPaidOnly\": false}]", "contributors": [], "langToValidPlayground": null, "topicTags": [ { "name": "Design", "slug": "design", "translatedName": "设计", "__typename": "TopicTagNode" }, { "name": "Trie", "slug": "trie", "translatedName": "字典树", "__typename": "TopicTagNode" }, { "name": "Hash Table", "slug": "hash-table", "translatedName": "哈希表", "__typename": "TopicTagNode" }, { "name": "String", "slug": "string", "translatedName": "字符串", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": null, "stats": "{\"totalAccepted\": \"3.5K\", \"totalSubmission\": \"6K\", \"totalAcceptedRaw\": 3487, \"totalSubmissionRaw\": 6012, \"acRate\": \"58.0%\"}", "hints": [ "Try to solve the first version first and reuse your code.", "To implement the delete function, you should delete the trie nodes of the word if they are not shared with other words.", "You should keep for each trie node a counter of how many words share this node." ], "solution": null, "status": null, "sampleTestCase": "[\"Trie\",\"insert\",\"insert\",\"countWordsEqualTo\",\"countWordsStartingWith\",\"erase\",\"countWordsEqualTo\",\"countWordsStartingWith\",\"erase\",\"countWordsStartingWith\"]\n[[],[\"apple\"],[\"apple\"],[\"apple\"],[\"app\"],[\"apple\"],[\"apple\"],[\"app\"],[\"apple\"],[\"app\"]]", "metaData": "{\n \"classname\": \"Trie\",\n \"constructor\": {\n \"params\": []\n },\n \"methods\": [\n {\n \"params\": [\n {\n \"type\": \"string\",\n \"name\": \"word\"\n }\n ],\n \"name\": \"insert\",\n \"return\": {\n \"type\": \"void\"\n }\n },\n {\n \"params\": [\n {\n \"type\": \"string\",\n \"name\": \"word\"\n }\n ],\n \"name\": \"countWordsEqualTo\",\n \"return\": {\n \"type\": \"integer\"\n }\n },\n {\n \"params\": [\n {\n \"type\": \"string\",\n \"name\": \"prefix\"\n }\n ],\n \"name\": \"countWordsStartingWith\",\n \"return\": {\n \"type\": \"integer\"\n }\n },\n {\n \"params\": [\n {\n \"type\": \"string\",\n \"name\": \"word\"\n }\n ],\n \"name\": \"erase\",\n \"return\": {\n \"type\": \"void\"\n }\n }\n ],\n \"return\": {\n \"type\": \"boolean\"\n },\n \"systemdesign\": true\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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