Remove Duplicate Elements
Two pointers overwrite duplicate values in a sorted array in-place.
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 remove_duplicates(arr):
if not arr: return 0
k = 1
for i in range(1, len(arr)):
if arr[i] != arr[i - 1]:
arr[k] = arr[i]
k += 1
return kEmbed this visualization
Drop a live, looping Remove Duplicate Elements canvas into a blog post or course page.
<iframe src="/embed/remove-duplicates" 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 Remove Duplicate Elements?
Remove Duplicate Elements runs in O(n) time and O(1) auxiliary space.
Is the Remove Duplicate Elements 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 Remove Duplicate Elements in interviews?
Remove Duplicate Elements shows up in interviews at Google, Microsoft.
How does the 3D visualization of Remove Duplicate Elements 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.