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https://gitee.com/coder-xiaomo/leetcode-problemset
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update
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@@ -46,7 +46,7 @@
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],
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"companyTagStats": null,
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"codeSnippets": null,
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"stats": "{\"totalAccepted\": \"3.3K\", \"totalSubmission\": \"4.1K\", \"totalAcceptedRaw\": 3301, \"totalSubmissionRaw\": 4066, \"acRate\": \"81.2%\"}",
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"stats": "{\"totalAccepted\": \"3.3K\", \"totalSubmission\": \"4.1K\", \"totalAcceptedRaw\": 3310, \"totalSubmissionRaw\": 4080, \"acRate\": \"81.1%\"}",
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"hints": [
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"Do a simple tree traversal, try to check if the current node is lonely or not.",
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"Node is lonely if at least one of the left/right pointers is null."
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