# use defaultdict to ensure default value of 0 is returned when accessing a key not exist in hash map # this effectively sets default frequency of all elements to 0 left_map = defaultdict (int) ...
🚀 Day 263 of #500DaysOfCode Solved LeetCode 2196 – Create Binary Tree From Descriptions 🌳 💡 Approach: Used a hash map to store and reuse TreeNode objects for each value. For every description ...
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