Longest Subarray Without Repeating Elements
Sliding window tracking last seen index of each element to guarantee 0 duplicates.
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 length_of_longest_unique_subarray(arr):
seen = {}
left = max_len = 0
for right, x in enumerate(arr):
if x in seen and seen[x] >= left:
left = seen[x] + 1
seen[x] = right
max_len = max(max_len, right - left + 1)
return max_lenEmbed this visualization
Drop a live, looping Longest Subarray Without Repeating Elements canvas into a blog post or course page.
<iframe src="/embed/longest-subarray-without-repeats" 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 Longest Subarray Without Repeating Elements?
Longest Subarray Without Repeating Elements runs in O(n) time and O(n) auxiliary space.
Is the Longest Subarray Without Repeating 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 Longest Subarray Without Repeating Elements in interviews?
Longest Subarray Without Repeating Elements shows up in interviews at Nvidia, Intel, Qualcomm.
How does the 3D visualization of Longest Subarray Without Repeating 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.