🚀 Day 41 of #100DaysOfCode! LeetCode: Tree Zigzag Level Order Traversal 🌳🔄 Started Notification System design & revised Observer pattern 📬 Learned UUIDs & exception handling in MVC with ControllerAdvice 🛠️ 41 days strong! 💪 #Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 42 of #100DaysOfCode! Solved LeetCode problems: Vertical Order Traversal of a Binary Tree 🌳 Find Bottom Left Tree Value 📍 Learned TreeMap operations & their time complexity 🗺️ Explored Red-Black Tree concepts 🔴⚫ 42 days strong! 💪 #Java #Backend #DSA #100DaysOfCode

!!Vertical Order Traversal!! 2 years ago, I struggled with this problem, spent hours, but couldn't solve so I gave up. "What you don't resolve, you'll repeat." So guys, if it's tough, take time, try new approaches, watch explanations, but don't give up! #Java #DSA #100DaysOfCod

🚀 Day 43 of #100DaysOfCode! Solved LeetCode Binary Search Tree problems: Insert into BST (Medium)🌳 Search in BST (Easy) 🔍 Delete Node in BST (Medium)✂️ Learned Spring Data JPA: Representing inheritance in databases 🗄️ #Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 44 of #100DaysOfCode! Dove into testing: Learned Test-Driven Development (TDD) 🧪 Explored types of testing: Unit, Integration, and Functional 📋 Keeping the streak alive! 💪 #Java #Backend #SystemDesign #100DaysOfCode

🚀 Day 45 of #100DaysOfCode! Solved LeetCode tree problems: LCA of Binary Tree 🌳 LCA of Binary Search Tree 🔍 Diameter of Binary Tree 📏 Balanced Binary Tree ⚖️ Learned HashMap internal working 🗺️ Revised design patterns 🛠️ #Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 46 of #100DaysOfCode! Started learning Heaps: Studied internal implementation of heaps 🥗 Explored Java's heap implementation (PriorityQueue) 🛠️ Solved LeetCode problems: Kth Largest and Smallest Element in Array 📈 📉 46 days strong! 💪 #Java #Backend #DSA #100DaysOfCode

🚀 Day 47 of #100DaysOfCode! Solved LeetCode problems: Relative Sort Array (gained strong grasp of Comparator) 📊 Count Total Number of Coloured Cells 🔢 DSA grind continues! 💻 47 days strong! 💪 #Java #Backend #DSA #100DaysOfCode

🚀 Day 48 of #100DaysOfCode! Solved LeetCode binary search problems: Find Minimum in Rotated Sorted Array 🔄 Find First and Last Position of Element in Sorted Array 🔍 Search Insert Position Started LLD of Notification System 📬 #Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 49 of #100DaysOfCode! Leetcode: Search in Rotated Sorted Array I🔄 Search in Rotated Sorted Array II🔄 First Bad Version 📍 Hit 200 LeetCode problems milestone! 🎉 Wrote unit tests using JUnit & Mockito 🧪 49 days strong! 💪#Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 50 of #100DaysOfCode! Sleepy day, but kept going: Solved LeetCode: Koko Eating Bananas 🍌 Revised design patterns: Builder, Strategy, Factory, Observer, Adapter, State 🛠️ Halfway there! 💪 #Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 51 of #100DaysOfCode! Solved LeetCode: Combination Sum I 🔢 Started Spring Boot project for e-commerce Product Service: Implemented CRUD operations 🛒 51 days strong! 💪 #Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 52 of #100DaysOfCode! Solved LeetCode matrix problems: Search a 2D Matrix I (O(log(N*M)) TC) 🔍 Search a 2D Matrix II (O(N*logM) TC) 📊 52 days strong! 💪 #Java #Backend #DSA #100DaysOfCode

🚀 Day 53 of #100DaysOfCode! Completed Notification System LLD: Designed class diagram & implemented core logic 📬 Explored Spring Boot's internal working 🌱 53 days strong! 💪 #Java #Backend #SystemDesign #100DaysOfCode

🚀 Day 54 of #100DaysOfCode! Solved LeetCode problems: Merge Strings Alternately 🔄 Minimum Additions to Make Valid String 📝 54 days strong! 💪 #Java #Backend #DSA #100DaysOfCode

🚀 Day 55 of #100DaysOfCode! Worked on system design: Designed Notification System architecture 📬 Refined Parking Lot system design 🚗 55 days strong! 💪 #Java #Backend #SystemDesign #100DaysOfCode

🚀 Restarted #100DaysOfCode on Day 1 after breaking a 56-day streak!💥 Solved LeetCode problems: Maximum Subarray Sum 📈 All Submatrix Sum (using contribution technique) 🧮 Revised Spring Data JPA internals 🗄️ Back stronger! 💪 #Java #Backend #DSA #SystemDesign #100DaysOfCode

🚀 Day 2 of #100DaysOfCode (restarted)! Solved LeetCode problems: First Missing Positive (Hard) 🔢 Find the Duplicate Number (Medium) 🔍 Building momentum! 💪 #Java #Backend #DSA #100DaysOfCode

🚀 Day 3 of restarted #100DaysOfCode! Solved LeetCode problems: Ugly Number II 🔢 Merge k Sorted Lists 🔗 Back in the groove! 💪 #Java #Backend #DSA #100DaysOfCode

🚀 Day 4 of restarted #100DaysOfCode! Solved LeetCode problems: Swap Nodes in Pairs 🔄 Reverse Nodes in k-Group 🪢 Completed Splitwise LLD 🧮 Momentum building! 💪 #Java #Backend #DSA #SystemDesign #100DaysOfCode