Vertical Order Traversal
Perform a vertical order traversal of a binary tree.
Input: root = [1,2,3,4,5,6,7]
Output: [[4],[2],[1,5,6],[3],[7]]
Explanation: Traverses the tree maintaining column indices, seamlessly grouping nodes that share the exact same vertical alignment.

Question

Perform a vertical order traversal of a binary tree.

Input: root = [1,2,3,4,5,6,7]

Output: [[4],[2],[1,5,6],[3],[7]]

Explanation: Traverses the tree maintaining column indices, seamlessly grouping nodes that share the exact same vertical alignment.