Leetcode 144. Binary Tree Preorder Traversal in Python | Python Leetcode | Python Coding Tutorial
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Leetcode 144. Binary Tree Preorder Traversal in Python | Python Leetcode | Python Coding Tutorial
Leetcode 144. Binary Tree Preorder Traversal in Python | Python Leetcode | Python Coding Tutorial Given the root of a binary tree, return the preorder traversal of its nodes' values. Example 1: Input: root = [1,null,2,3] Output: [1,2,3] Explanation: Example 2: Input: root = [1,2,3,4,5,null,8,null,null,6,7,9] Output: [1,2,4,5,6,7,3,8,9 ...
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