15. Lowest Common Ancestor (LCA) ⭐
Finds the deepest node that has both nodes p and q as descendants.
Live loop — open the studio to scrub, add your own array, or race it in Battle Arena.
Asked in interviews at
Reference implementation (Python)
def lowest_common_ancestor(root, p, q):
if not root or root == p or root == q:
return root
left = lowest_common_ancestor(root.left, p, q)
right = lowest_common_ancestor(root.right, p, q)
if left and right:
return root
return left if left else rightEmbed this visualization
Drop a live, looping 15. Lowest Common Ancestor (LCA) ⭐ canvas into a blog post or course page.
<iframe src="/embed/tree-lca" width="100%" height="380" style="border:1px solid #e6e8ec;border-radius:14px" loading="lazy" title="3D algorithm visualization by CodeWithMunnaX"></iframe>Frequently asked
What is the time and space complexity of 15. Lowest Common Ancestor (LCA) ⭐?
15. Lowest Common Ancestor (LCA) ⭐ runs in O(n) time and O(h) auxiliary space.
Is the 15. Lowest Common Ancestor (LCA) ⭐ visualizer free?
The core 3D visualizer, Web Audio chimes and step intuition are free. A one-time ₹49 Pro Pass unlocks advanced algorithms, large custom arrays, Battle Arena and reel export.
Which companies ask 15. Lowest Common Ancestor (LCA) ⭐ in interviews?
15. Lowest Common Ancestor (LCA) ⭐ shows up in interviews at Amazon, Apple, Stripe.
How does the 3D visualization of 15. Lowest Common Ancestor (LCA) ⭐ work?
Each array value becomes a 3D pillar whose height maps to its value. Comparisons glow amber, swaps flash red, and settled elements lock green while a floating pointer badge tracks the active index — synchronized line-by-line with the Python code.