After a 34-day drought, I’m officially back in the grind — and it feels good to get the rhythm going again. 💪
🧩 DSA Problems [1 hr]
Problem: Find Resultant Array After Removing Anagrams (LeetCode 2273)
This was a nice warm-up to shake off the rust — not too complex, but a solid logic-based question.
🧠 Idea
Iterate through the list, and only keep a word if its sorted characters differ from the previous one’s sorted characters (meaning it’s not an anagram).
💻 Code
class Solution(object):
def removeAnagrams(self, words):
ans = [words[0]]
for i in range(1, len(words)):
a, b = sorted(words[i]), sorted(ans[-1])
if a != b:
ans.append(words[i])
return ans
⚡ Takeaways
Used sorted strings to detect anagrams efficiently.
Perfect reminder that simplicity > cleverness — clean logic wins.
Great re-entry problem to rebuild problem-solving momentum.
🏗 System Design — Roadmap.sh [1 hr]
🌐 Topic: Availability in Numbers
Availability is all about how long a service stays up and running — usually expressed in number of 9s.
Level Uptime % Max Downtime Per Year
3 Nines 99.9 % 8 h 41 min 38 s
4 Nines 99.99 % 52 min 9.8 s
Even one extra “9” massively cuts downtime.
⚙️ Availability in Sequence vs Parallel
In Sequence
Availability drops because both components must work.
Total = A(Foo) × A(Bar)
Example: 99.9 % × 99.9 % = 99.8 %.
In Parallel
Availability rises since one component can cover for another.
Total = 1 – (1 – A(Foo)) × (1 – A(Bar))
Example: 99.9 % each ⇒ 99.9999 %.
You can experiment with numbers here → uptime.is calculator
.
🧩 Reflection
Coming back after a break reminded me that availability applies to humans too: when one part of your routine goes down, redundancy (habits, structure, accountability) helps bring it back up. 😉
💬 Final Thoughts
✅ Day 9 done!
It’s not about never falling off — it’s about coming back stronger.
Key takeaways:
Keep DSA problems light to rebuild momentum.
Revisit System Design numbers to solidify intuition.
Progress > Perfection — always.
🤝 Let’s Connect
Have you ever taken a break and struggled to restart your learning streak?
Drop a 🔁 if you’ve ever had to “replicate” your own discipline!
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