LeetCode Experience

#508 Most Frequent Subtree Sum

Interview Experience

LeetCode #508: Most Frequent Subtree Sum. Difficulty: Medium. Topics: Hash Table, Tree, Depth-First Search, Binary Tree. Asked at Amazon in the last 6 months.

Original Source

This is a frequency-tagged signal. The full problem statement lives on the original source.

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Topics

Binary Tree Depth-First Search Tree Binary Tree Graph Hash Table