Solution: Find Nodes at k Distance from the Root

Explore how to identify all nodes at a distance k from the root in a binary tree using depth-first search (DFS). This lesson explains the recursive traversal method, decrements the distance at each step, and collects nodes when the distance reaches zero. Understand the time complexity of O(n) and space complexity of O(h), where n is the number of nodes and h is the tree height, preparing you for efficient tree traversal problems in C++ coding interviews.