Left View of a Binary Tree

Short summary

Solve the left view of a binary tree using level-order traversal (BFS). Record the first node encountered at each level with O(N) time and space complexity. Includes Java code, visual example, and interview explanation.

• •Use BFS to traverse the tree level-by-level
• •Capture the first node at each level for the left view
• •Time/space complexity: O(N) with clean code example

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