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Search in a Binary Search Tree — BST Property Navigation
Find a node with given value in a BST by navigating left or right based on the BST property.
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Binary Tree Level Order Traversal — BFS Queue
Return values grouped by level using BFS with a queue, processing each level in a batch loop.
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Binary Tree Zigzag Level Order — Alternating Direction BFS
Traverse a binary tree in zigzag level order by toggling insertion direction at each level.
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Binary Tree Right Side View — BFS Last Element Per Level
Find the rightmost node at each level using BFS and taking the last element seen at each depth.
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Path Sum II — DFS Backtracking All Paths
Collect all root-to-leaf paths with a given sum using DFS backtracking, appending and removing the current node.
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