Vertical Order Traversal of a Binary Tree

Given the root of a binary tree, sort its nodes by column from left to right. Nodes in the same column are ordered top to bottom by row, with ties on the same row and column broken by node value. Vertical Order Traversal of a Binary Tree Given the root of a binary tree, sort its nodes by column from left to right. Nodes in the same column are ordered top to bottom by row, with ties on the same row and column broken by node value. SWE tree tree-traversal bfs sorting hard Frequency Single report Last asked 2026-03-21 Stage phone-screen Vertical Order Traversal of a Binary Tree Given the root of a binary tree, sort its nodes by column from left to right. Nodes in the same column are ordered by row from top to bottom, and ties on the same row and column are broken by node value. Examples Example 1: Input: root = [3,9,20,null,null,15,7] Output: [[9],[3,15],[20],[7]] Constraints 1 <= number of nodes <= 1000 0 <= Node.val <= 1000