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15. Find Nth Node from End ⭐

Advances fast pointer n steps ahead, then moves both slow and fast together until fast reaches end.

Time O(n) Space O(1)

Live loop — open the studio to scrub, add your own array, or race it in Battle Arena.

Asked in interviews at

SpotifyGoogleAirbnb

Reference implementation (Python)

def find_nth_from_end(head, n):
    fast = slow = head
    for _ in range(n):
        fast = fast.next
    while fast:
        slow = slow.next
        fast = fast.next
    return slow

Embed this visualization

Drop a live, looping 15. Find Nth Node from End ⭐ canvas into a blog post or course page.

<iframe src="/embed/nth-from-end" 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. Find Nth Node from End ⭐?

15. Find Nth Node from End ⭐ runs in O(n) time and O(1) auxiliary space.

Is the 15. Find Nth Node from End ⭐ 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. Find Nth Node from End ⭐ in interviews?

15. Find Nth Node from End ⭐ shows up in interviews at Spotify, Google, Airbnb.

How does the 3D visualization of 15. Find Nth Node from End ⭐ 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.