Oct 24, 2025 · 5 min read · If you are exploring graph algorithms, the tree structures can look deceptively simple until you encounter recursion depth, node parity, and leaf-handling logic. In this CatShock problem, it combines dynamic leaf update, depth parity, and DFS into on...
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Sep 5, 2025 · 1 min read · Tree Planting Campaigns are powerful reminders that even small steps can create a big impact on the planet. By restoring green cover, they improve air quality, reduce urban heat, and bring communities together for a common purpose. These initiatives ...
Join discussionAug 2, 2025 · 1 min read · What is a Binary Tree? Binary trees are fundamental data structures in computer science, forming the basis of many advanced algorithms and applications. A binary tree is a hierarchical structure where each node has up to two children, typically refer...
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Jul 11, 2025 · 3 min read · LeetCode 653. Two Sum IV - Input is a BST Approach The problem requires us to find if there exist any two nodes in a Binary Search Tree (BST) that sum up to a given target value k. The solution uses an inorder traversal approach combined with a has...
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Jun 7, 2025 · 12 min read · Introduction to Trees in C++ When working with data structures in C++, most beginners start with arrays, stacks, or queues—structures where data is stored linearly. But not all problems fit neatly into a straight line. That’s where trees, a powerful ...
Join discussionApr 7, 2025 · 2 min read · Hey folks! I'm Subhayan Mukherjee, a CSE student from NIT Durgapur – and today I stumbled upon something super quirky while working on Binary Search Trees (BSTs). You probably learned in DSA class that: "If you have both inorder and preorder/postord...
Join discussionMar 23, 2025 · 2 min read · Problem Given the root of a binary tree, return the zigzag level order traversal of its nodes' values. (i.e., from left to right, then right to left for the next level and alternate between). (link) Example 1: Input: root = [3,9,20,null,null,15,7] O...
Join discussionMar 8, 2025 · 2 min read · Time travel is exciting to think about. Many movies and books talk about it. But if time travel were real, would changing the past affect the future? The Grandfather Paradox is a famous idea that asks this question. What is the Grandfather Paradox? I...
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Mar 6, 2025 · 3 min read · What is DOM? DOM (Document Object Model) is a programming interface that represents the structure of an HTML document as a tree-like structure. It allows JavaScript to interact with, modify, and manipulate the elements of a web page dynamically. Prer...
Join discussionFeb 3, 2025 · 16 min read · A tree is a hierarchical data structure with a set of connected nodes. A family tree or an organogram comes to mind easily. With this data structure, there is a parent-child relationship between an ancestor node and a child node, and these relationsh...
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