Longest Subarray Equal 0s & 1s
Transforms 0s to -1s and solves as longest subarray with sum 0.
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Asked in interviews at
Reference implementation (Python)
def find_max_length(arr):
seen = {0: -1}
max_len = count = 0
for i, x in enumerate(arr):
count += 1 if x == 1 else -1
if count in seen:
max_len = max(max_len, i - seen[count])
else:
seen[count] = i
return max_lenEmbed this visualization
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<iframe src="/embed/longest-subarray-equal-zeros-ones" 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 Equal 0s & 1s?
Longest Subarray Equal 0s & 1s runs in O(n) time and O(n) auxiliary space.
Is the Longest Subarray Equal 0s & 1s 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 Equal 0s & 1s in interviews?
Longest Subarray Equal 0s & 1s shows up in interviews at Microsoft, Apple, Bloomberg.
How does the 3D visualization of Longest Subarray Equal 0s & 1s 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.