Print a Custom Tree Pattern

Problem: Construct a tree of a given pattern and print it (e.g. level-order or shape-based printing of a binary/n-ary tree). Constraints: Pattern/shape specified by the interviewer at the whiteboard. Approach: Build the tree structure per the specified rule, then traverse it (BFS/level-order or DFS depending on requested print shape) to produce the pattern output, handling spacing/indentation to visually represent the tree shape correctly.