Bala

Software Engineer (10+ yrs) leveling up through #100DaysOfCode
Sharing LeetCode + LLD/HLD prep openly
DM if you want to exchange notes or do mock interviews 🤝

[Bala @hibala93]

🚀 Day 80/100 #100DaysOfCode

✅ K-th Largest Element in an Array
✅ K-th Largest Element in a Stream of Running Integers
#LeetCode #BuildInPublic #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 79/100 #100DaysOfCode

✅ Two Sum II – Input Array Is Sorted
✅ Find the Starting Point in Linked List
✅ Length of Loop in Linked List
✅ Binary Prefix Divisible by 5
#LeetCode #BuildInPublic #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 76/100 #100DaysOfCode

✅ Keep Multiplying Found Values by Two
✅ Next Greater Element (Monotonic Stack)
✅ Path with Minimum Effort
#LeetCode #BuildInPublic #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 77/100

✅ Subarray Sum Equals K
✅ Longest Subarray with Sum K
✅ Minimum Window Substring
✅ Number of Substrings Containing All Three Characters

🚀 Day 78/100

✅ Word Break (Revisited & Optimized)

[Bala @hibala93]

🚀 Day 75/100

✅ Check if Linked List is Palindrome
✅ Delete the Middle Node in Linked List
✅ 1-bit and 2-bit Characters
✅ HLD + LLD: Uber System Design — Matching, Geo-hash, ETA

#SystemDesign #LLD #HLD #BuildInPublic #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 72/100 #100DaysOfCode
✅ Longest Repeating Character Replacement

🚀 Day 73/100 #100DaysOfCode
✅ Number of Distinct Islands
✅ Number of Substrings with Only 1s

#LeetCode #BuildInPublic #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 74/100 #100DaysOfCode
✅ Palindrome Partitioning
✅ Check if all 1s are at least K places apart

#LeetCode #BuildInPublic #LearnInPublic

[Bala @hibala93]

After some break, started again! ✨

🚀 Day 71/100 #100DaysOfCode

✅ Sort an Array of 0’s, 1’s, and 2’s
✅ Segregate 0’s and 1’s in an Array
✅ Increment Submatrices by One
#LeetCode #BuildInPublic #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 70/100 #100DaysOfCode

✅ Best Time to Buy and Sell Stock
✅ Count Operations to Obtain Zero

#LeetCode #BuildInPublic #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 67/100 #100DaysOfCode
✅ Check if Array Represents a Min Heap
✅ Strategy Design Pattern
✅ Chat / Messaging System (Realtime)
📝 Design WhatsApp/Slack-style chat
#LeetCode #SystemDesign #BuildInPublic #LearnInPublic #Java

[Bala @hibala93]

🚀 Day 69/100 #100DaysOfCode

✅ Add One to a Number Represented by Linked List

#DSA #LeetCode #BuildInPublic #LearnInPublic

[Bala @hibala93]

🚀 Day 66/100 #100DaysOfCode
✅ Queue via Linked List + UML refresh
✅ Behavioral patterns: CoR, Command, Memento, Visitor, Mediator
#LeetCode #BuildInPublic #DevCommunity #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 65/100 #100DaysOfCode
✅ Implement Queue using Arrays
✅ Grid Unique Paths
#LeetCode #BuildInPublic #DevCommunity #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 64/100 #100DaysOfCode

✅ Minimum Time to Make Rope Colorful (Greedy)
✅ Explored Command & Flyweight Design Patterns
#LeetCode #BuildInPublic #DevCommunity #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 64/100 #100DaysOfCode
✅ Implement Stack & Balanced Parenthesis
✅ Middle of Linked List, Kth Smallest in BST, Detect Cycle (Graph)
✅ Top K Frequent Elements (Heap + HashMap)

#LeetCode #BuildInPublic #DevCommunity #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 62 & 63
✅ Minimum Bit Flips to Convert Number (Bit Manipulation)
✅ Longest Substring with At Most K Distinct Characters
✅ Count Unguarded Cells in the Grid

#100DaysOfCode
#LeetCode #BuildInPublic #DevCommunity #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 61/100 #100DaysOfCode

✅ HLD Diagram & System Design: Collaborative Notes App (Multi-user, Search, Share)

💡Successfully completing 2 months of #100DaysOfCode — consistency pays off!

#LeetCode #BuildInPublic #DevCommunity #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 61/100 #100DaysOfCode
✅ Word Search (Backtracking & DFS)
✅ Highest Occurring Element (Hashing)
✅ Two Sneaky Numbers of Digitville (Bit Manipulation)

#LeetCode #BuildInPublic #DevCommunity #LearnInPublic #TUFWinterArc #Java

[Bala @hibala93]

🚀 Day 60/100 #100DaysOfCode

✅ Longest K Unique Characters Substring & Replace O’s with X’s
✅ HLD Concepts + Diagram Overview

#LeetCode #BuildInPublic #DevCommunity #LearnInPublic

[Bala @hibala93]

🚀 Day 60/100 #100DaysOfCode

✅ Max Sum of Non-Adjacent Elements & House Robber (1D DP)
✅ Min Increments on Subarrays to Form Target (Greedy Logic)

#LeetCode #BuildInPublic #DevCommunity #LearnInPublic