[LeetCode刷題筆記] 648 – Replace Words
題目描述： In English, we have a concept called root, which …
Programming Notes
[LeetCode刷題筆記] 559 – Maximum Depth of N-ary Tree
題目描述： Given a n-ary tree, find its maximum depth. The m …
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[LeetCode刷題筆記] 429 – N-ary Tree Level Order Traversal
題目描述： Given an n-ary tree, return the level order trave …
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[LeetCode刷題筆記] 380 – Insert Delete GetRandom O(1)
題目描述： Implement the RandomizedSet class: bool insert(in …
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[LeetCode刷題筆記] 347 – Top K Frequent Elements
題目描述： Given a non-empty array of integers, return the * …
[LeetCode刷題筆記] 3 – Longest Substring Without Repeating Characters
題目描述： Given a string s, find the length of the longest …
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[LeetCode刷題筆記] 652 – Find Duplicate Subtrees
題目描述： Given the root of a binary tree, return all dupli …