Lucia Negreanu Maior’s Post

Master the most essential Hash Map and Set problems on LeetCode — from simple frequency checks to advanced logic patterns. Each tutorial walks you step by step through clean, modern C++ solutions, explained visually and intuitively. 🔹 Ideal for coding interview preparation 🔹 Covers both Easy and Medium problems 🔹 Topics: frequency maps, sets, hash tables, string comparison Patterns. Logic. Frequency. Learn to recognize them all in this focused Hash Map & Set Series in C++ — from easy to medium, explained clearly and efficiently. 🎥 Watch the full playlist 👉 https://lnkd.in/dd_chzrm #LeetCode #Cplusplus #Programming #DataStructures #Algorithms #CodingInterview #LANAcademy #LearnToCode

What if you could visualize a binary tree from the right side only? 🌲 In this video, we solve LeetCode 199 – Binary Tree Right Side View using a simple DFS logic in C++. Perfect for anyone preparing for coding interviews or learning tree traversal techniques. 🎥 Watch here: https://lnkd.in/dwycvsWd #LeetCode #Programming #Cplusplus #LANAcademy #CodingInterview

𝐋𝐞𝐚𝐫𝐧 𝐂++ 𝐟𝐫𝐨𝐦 𝐒𝐜𝐫𝐚𝐭𝐜𝐡 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞 𝐂𝐨𝐮𝐫𝐬𝐞 𝐰𝐢𝐭𝐡 𝐄𝐱𝐚𝐦𝐩𝐥𝐞𝐬 Start coding with a step-by-step guide made for C++ for beginners. What you’ll master: Setup (VS Code + g++) Syntax, I/O, control flow & loops Functions, arrays/strings/vectors Pointers & memory (simple!) OOP (classes, inheritance, polymorphism) STL algorithms + templates File I/O & exceptions 🎯 Mini Project: Student Score Manager Dive in now 👉 https://lnkd.in/dS-jHfHY #CPlusPlus #Cpp #Programming #STL #OOP #LearnToCode

While experimenting with nested classes, I tried using a static class in C++ — but realized that it’s not valid syntax! Here’s what I learned 👇 🚫 static class is not allowed in C++. The static keyword can only be used with: Variables (to make them retain value or be class-level) Functions (to call them without an object) Global variables/functions (to limit scope within a file) ✅ Correct way to define a nested class: #include <iostream> using namespace std; class A { public: class A1 { public: int x; A1() { x = 10; } }; A1 obj; // Object of inner class }; int main() { A obj1; cout << obj1.obj.x; // Output: 10 } 🧠 Takeaway: C++ allows nested classes, but not static class. static is used only with data members, member functions, and local variables, not with class declarations. #Cplusplus #LearningJourney #Programming #OOPs #Coding #Developers #CppLearning

New video released – LeetCode 1207: Unique Number of Occurrences (C++) A concise explanation of how to use HashMap and Set to detect unique frequencies in arrays. 💡 You’ll learn: • When to use sets to enforce uniqueness • How to map values to counts efficiently • Clean and structured thinking for interviews ▶️ Watch here: https://lnkd.in/dXgzANkM 📘 Full course: LeetCode 75 Series (C++ Explained) https://lnkd.in/dWZM5bN4 #LeetCode #CPlusPlus #Programming #DataStructures #CodingInterview #LANAcademy

📅 Day 47 of #100DaysOfCode Problem: Combination Sum II (LeetCode 40) Approach: 1️⃣ Sorted the array to handle duplicates easily. 2️⃣ Used recursion to explore each number — either include it or skip it. 3️⃣ Reduced the target as I added elements, and when the target hit 0, that path became a valid combination. 4️⃣ Skipped duplicates using a simple check: if (i > idx && candidates[i] == candidates[i-1]) continue. #100DaysOfCode #LeetCode #DSA #ProblemSolving #Backtracking #Recursion #Cplusplus #CodingChallenge #Algorithms #Programming #DeveloperLife #CodeNewbie #SoftwareEngineering #DailyDSA #CodingJourney #KeepLearning #TechCommunity #Motivation #GrowthMindset

Day Three: Building Interactive C Applications – Data, Input, and Arithmetic 💻 Day 3 of my C programming deep dive was focused on transforming static code into interactive applications. I successfully built a basic terminal "form" that accepts various data types from the user and outputs a formatted summary. This exercise solidified my understanding of: Handling User Input (scanf): Learned how to correctly accept and store different data types—like strings (%s), integers (%d), characters (%c), and floats (%f)—into their respective variables. Data Types in Action: Applied char arrays, int, and float data types to organize real-world information effectively. Arithmetic Operators: (e.g., +, -, *, /, ++, --, %) to perform calculations on user-provided data, moving beyond simple data storage to basic data processing. 💡 Next Goal: Applying Conditional Statements (if/else) and Loops to make the program decide and repeat actions based on the input data. Fun fact: Unlike Python that handles stuff, I nearly lost it trying to write the code to just accept user input 😂💔 #CProgramming #TerminalApplications #UserInput #ProgrammingFundamentals #LearningInPublic #ImanLearns #Day3

🚀 Project Highlight: File Organizer Tool I created a Python-based File Organizer Tool that automatically sorts files in a directory into categorized folders such as Images, Documents, Videos, Audio, Scripts, Archives, and Others — all with a single run! 🎯 Goal: To simplify file management by using automation to organize cluttered directories efficiently. 🔧 Tools & Technologies Used: Python – Core programming language OS Module – For directory and file operations Shutil Module – For moving files between folders 💡 Key Features: Automatically detects file types based on extensions Creates categorized folders dynamically Moves files to their respective folders (e.g., .jpg → Images, .pdf → Documents) Helps maintain a clean and structured workspace 📈 Outcome: This project improved my understanding of Python file handling, OS operations, and automation scripting. I plan to extend it by adding a GUI interface and real-time folder monitoring in the future. #Python #Automation #FileOrganizer #PythonProjects #LearningByDoing #Coding #ProductivityTools #OutriX #OutrixAchievements #OutriXProjects

📅 Day 41 of #100DaysOfCode Problem: Merge k Sorted Lists (LeetCode 23) This one was all about optimization and clean recursion. Instead of merging lists one by one, I used a divide and conquer approach merge them in pairs, just like merge sort. Approach: 1️⃣ If there’s only one list, return it - base case. 2️⃣ Split the range of lists into two halves using recursion. 3️⃣ Merge both halves using a helper function that merges two sorted lists. 4️⃣ Keep dividing until everything is combined into one sorted list. #100DaysOfCode #LeetCode #DSA #Cplusplus #ProblemSolving #DivideAndConquer #Recursion #CodingChallenge #Algorithms #Programming #CodeNewbie #DeveloperLife #LearningInPublic #KeepLearning #SoftwareEngineering #TechCommunity #DailyDSA #GrowthMindset #Motivation