Скачать или смотреть 🌲 Day -85 of My DSA Journey | Tree Algorithms & Advanced Subsequence Logic 🔥

Today was another power-packed day where I deepened my understanding of Binary Trees, enhanced my problem-solving in tree-based algorithms, and tackled two dynamic Problem of the Day challenges. I focused on optimizing recursive solutions and diving into greedy and heap-based logic.

📌 Problems I Solved Today:
🌳 1. Diameter of Binary Tree
– Used postorder traversal to compute the diameter by tracking the longest path between any two nodes.
– Improved my recursive thinking and edge-case handling.

🌳 2. Symmetric Tree
– Checked for mirror symmetry in binary trees using recursion.
– Strengthened my skills in comparing left-right subtrees recursively.

📸 3. Binary Tree Cameras
– Devised a strategy to place the minimum number of cameras in a binary tree to monitor all nodes.
– Implemented a clever recursive state-tracking method to decide whether a node needs a camera or is already covered.
– This problem reinforced greedy and DFS-based techniques for tree coverage.

💡 LeetCode POTD – Longest Unequal Adjacent Groups Subsequence II
– Involved dynamic programming with Hamming distance constraints.
– Built the longest subsequence where adjacent elements belonged to different groups and had Hamming distance = 1.
– Learned how to backtrack subsequence paths using parent arrays and state transitions.

🔍 GFG POTD – Smallest Range in K Lists
– Applied a min-heap-based approach to find the smallest range that includes at least one number from each of the K lists.
– Used priority queues and pointer tracking to efficiently maintain and update range boundaries.
– Enhanced my grip over heap operations and sliding window strategy in multidimensional lists.

🧠 Key Learnings:
Revisited and mastered multiple tree traversal techniques (inorder, postorder, mirror comparisons).

Tackled complex state-based tree problems like Binary Tree Cameras.

Strengthened dynamic programming skills in sequence construction problems.

Understood the interplay of priority queues and range optimization in multi-list problems.

📂 GitHub Repo – [Insert GitHub Link]
🎥 YouTube Walkthrough – [Insert YouTube Link]

🔥 Wrapping up Day 85
Each day of this journey is sharpening my edge. The problems today not only challenged my logic but pushed me toward writing cleaner, scalable solutions. On to Day 86! 🚀

#DSA #100DaysOfCode #BinaryTrees #DynamicProgramming #GreedyAlgorithms #LeetCodePOTD #GFGPOTD #C++ #ProblemSolving #TechWithSatya #GitHub #YouTube #DSAWithC++ #CodingJourney #LinkedInPost #SoftwareEngineering