Min Stack (O(1) Minimum)
Custom stack structure that retrieves the minimum element in O(1) constant time.
Live loop — open the studio to scrub, add your own array, or race it in Battle Arena.
Asked in interviews at
Reference implementation (Python)
class MinStack:
def __init__(self):
self.stack = []
self.min_stack = []
def push(self, val):
self.stack.append(val)
curr_min = min(val, self.min_stack[-1] if self.min_stack else val)
self.min_stack.append(curr_min)
def pop(self):
self.min_stack.pop()
return self.stack.pop()
def getMin(self):
return self.min_stack[-1]Embed this visualization
Drop a live, looping Min Stack (O(1) Minimum) canvas into a blog post or course page.
<iframe src="/embed/min-stack" 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 Min Stack (O(1) Minimum)?
Min Stack (O(1) Minimum) runs in O(1) time and O(n) auxiliary space.
Is the Min Stack (O(1) Minimum) 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 Min Stack (O(1) Minimum) in interviews?
Min Stack (O(1) Minimum) shows up in interviews at Amazon, Microsoft, Bloomberg.
How does the 3D visualization of Min Stack (O(1) Minimum) 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.