Bird
Raised Fist0

How would you modify the invert binary tree algorithm to invert an n-ary tree where each node can have multiple children instead of just two?

hard🔁 Follow-up Q10 of Q15
Tree: Depth-First Search - Invert Binary Tree
How would you modify the invert binary tree algorithm to invert an n-ary tree where each node can have multiple children instead of just two?
ASwap only the first and last child at each node
BReverse the list of children at each node recursively
CInvert only the leftmost and rightmost children recursively
DConvert the n-ary tree to binary tree first, then invert
Step-by-Step Solution
Solution:

  1. Step 1: Understand n-ary tree structure

    Each node has a list of children, not just left and right.

  2. Step 2: Adapt inversion

    Inverting means reversing the order of children at each node recursively.

  3. Final Answer:

    Option B -> Option B

  4. Quick Check:

    Reversing children list mirrors the n-ary tree [OK]
Quick Trick: Reverse children list at each node recursively [OK]
Common Mistakes:
MISTAKES
  • Swapping only two children ignores other children
  • Converting to binary tree adds unnecessary complexity
Trap Explanation:
PITFALL
  • Swapping only two children misses full inversion of n-ary structure.
Interviewer Note:
CONTEXT
  • Tests ability to generalize binary tree algorithms to n-ary trees.
Master "Invert Binary Tree" in Tree: Depth-First Search

3 interactive learning modes - each teaches the same concept differently

Try ItSolutionTrace

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Tree: Depth-First Search Quizzes
Binary Tree Cameras - Binary Tree Cameras - Quiz 6medium Binary Tree Postorder Traversal - Binary Tree Postorder Traversal - Quiz 4medium Construct Tree from Inorder and Postorder - Construct Tree from Inorder and Postorder - Quiz 15hard Maximum Depth of Binary Tree - Maximum Depth of Binary Tree - Quiz 4medium Path Sum - Path Sum - Quiz 9hard Path Sum II (All Root-to-Leaf Paths) - Path Sum II (All Root-to-Leaf Paths) - Quiz 10hard Path Sum II (All Root-to-Leaf Paths) - Path Sum II (All Root-to-Leaf Paths) - Quiz 11easy Path Sum III (Any Path) - Path Sum III (Any Path) - Quiz 7medium Sum Root to Leaf Numbers - Sum Root to Leaf Numbers - Quiz 6medium Symmetric Tree (DFS Approach) - Symmetric Tree (DFS Approach) - Quiz 2easy