Rubayed Ahmed Foysal
@rubayedahmed_
CS Student || DSA || C++ || Aspiring Software Engineer || Dedicated to Solving Complex, Real-World Problems 🚀
🧩 Day 178 - #DSA Today I explored: 🔹 Zero Sum Subarray – using prefix sum + hashmap 🔹 K Sum Subarray – counting subarrays with sum = k in O(N) Great practice for mastering prefix sum & hash-based logic! #DSA #Coding #LeetCode #ProblemSolving
Day 176 - #DSA 🚀 Today I explored: • Smallest Range Covering Elements from K Lists • Construct Target Array With Multiple Sums 💡 Improved my skills in heaps, greedy strategies, and efficient array manipulation. #DSA #Heap #PriorityQueue #Coding #LeetCode #Algorithms
Day 175 - #DSA 🚀 Today I explored: • Merge K Sorted Lists • Merge K Sorted Arrays 💡 Strengthened my understanding of heaps, priority queues, and efficient merging techniques. #DSA #Heap #Coding #Algorithms #LeetCode #GFG
Day 174 | #DSA 🚀 Today I explored two key heap problems: • Kth Smallest Element in a Matrix • Find Median in a Stream 💡 Strengthened my understanding of heaps, element ordering, and real-time data handling. #Heap #DSA #Coding #Algorithms #LeetCode #ProblemSolving
Day 173 - #DSA🚀 Today I explored key Heap concepts: • Merge Two Heaps • Check if Binary Tree is a Heap • Convert BST to Max Heap 💡 Strengthened my understanding of heap transformations and property validation! #DSA #Heap #BST #Coding #LearningJourney
🧩 Day 172 - #DSA Explored essential heap problems today — mastering priority queues and greedy logic through: • Height of Heap • Min Cost of Ropes • Magician & Chocolates • Last Stone Weight • Profit Maximisation #DSA #Heap #Coding #LeetCode #GFG #ProblemSolving
🚀 Day 171 - #DSA Today I explored: • Kth Smallest & Largest • Kth Largest in Stream • Sum Between K1th & K2th Smallest Deepened my understanding of heaps and range queries. 💡 #DSA #Heap #LeetCode #Coding #Algorithms
🧠 Day 170 - #DSA Today I explored: • Build Max & Min Heap in O(n) using the step-down approach . • Heap Sort (O(n log n), O(1) space) • Priority Queue fundamentals #DSA #Heap #HeapSort #Coding #Algorithms
🧠 Day 169 - #DSA Today I learned: 🔹 Max Heap 🔹 Min Heap 🔹 Insertion & Deletion operations #DSA #Heap #Coding #Algorithms #DataStructures
🧩 Day 168 - #DSA Today I explored key C++ STL containers: 🔹 List – efficient insert/delete operations 🔹 Pair – store two related values 🔹 Map – key-value storage 🔹 Set – unique sorted elements #DSA #STL #CPlusPlus #Coding #ProblemSolving #LearningJourney
Day 167 | DSA Journey🌿 Today, I learned AVL Tree deletion — understanding how rotations restore balance after removing a node to maintain O(log N) efficiency. #DSA #AVLTree #Coding #Algorithms #ProblemSolving
Day 166 - #DSA🌿 Today, I learned about AVL Tree insertion and how rotations (LL, RR, LR, RL) maintain balance in the tree for efficient operations. #DSA #AVLTree #Coding #Algorithms #ProblemSolving
Day 165 - #DSA 🌳 Today I solved: 🔹 Largest BST in a Binary Tree 🔹 Maximum Sum BST in a Binary Tree Implemented both using a Box class for clean recursion and achieved O(N) efficiency. #DSA #BinarySearchTree #LeetCode #ProblemSolving
Day 164 - #DSA🌳 Solved advanced BST problems today: • Convert Sorted Linked List to BST • Merge Two BSTs • Fix Two Swapped Nodes using Morris Traversal (O(1) space) #DSA #BST #LeetCode #Coding #Algorithms #ProblemSolving
Day 163 - #DSA🌳 Solved key BST problems today: • Lowest Common Ancestor • Keys in a Range • BST with Dead End • Common Nodes in Two BSTs #DSA #BST #LeetCode #Coding #Algorithms
Day 162 - #DSA🌳 Explored BST construction and traversal today: • Construct BST from Preorder Traversal • Construct BST from Postorder Traversal • Preorder Traversal and BST #DSA #BST #LeetCode #Coding #Algorithms #ProblemSolving
Day 161 - #DSA 🌳 Focused on core Binary Search Tree problems today: • Check for BST • Minimum Distance Between BST Nodes • Sum of K Smallest Elements • Kth Largest Element • Convert Array to BST #DSA #BST #Coding #LeetCode #ProblemSolving #DataStructures
Day 160 – #DSA 🌳 Today I explored Binary Search Tree (BST) and learned its: • Implementation • Insertion • Deletion • Search operations A solid step toward mastering efficient data organization and lookup! 💡 #BinarySearchTree #DSA #Coding #Algorithms #LearningJourney
Day 160 – #DSA 🌳 Today I explored Binary Search Tree (BST) and learned its: • Implementation • Insertion • Deletion • Search operations A solid step toward mastering efficient data organization and lookup! 💡 #BinarySearchTree #DSA #Coding #Algorithms #LearningJourney
Day 160 – #DSA 🌳 Today I explored Binary Search Tree (BST) and learned its: • Implementation • Insertion • Deletion • Search operations A solid step toward mastering efficient data organization and lookup! 💡 #BinarySearchTree #DSA #Coding #Algorithms #LearningJourney
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