Learning the Command Pattern from Head First Design Patterns

🔥 Day 70 of #100DaysOfCode 🔥 💡 Problem: Number of Steps to Reduce a Number to Zero – LeetCode ✨ Approach: A simple while loop logic — divide the number by 2 if it’s even, else subtract 1. Repeated until it hits zero. Clean, elegant, and lightning fast! ⚡ 📊 Complexity Analysis: Time Complexity: O(log n) – each division by 2 halves the number Space Complexity: O(1) – constant space ✅ Runtime: 0 ms (Beats 100%🔥) ✅ Memory: 41.95 MB 🚀 Key Takeaway: Sometimes, brilliance lies in simplicity — clear logic, powerful performance! #LeetCode #100DaysOfCode #ProblemSolving #CodingChallenge #Programming #DSA #LogicBuilding #Efficiency #CodeDaily #DeveloperJourney

From Arrays and Linked Lists to Graphs and Tries, each structure organizes data differently and serves unique real-world purposes — from managing browser history and social networks to building file systems and dictionaries. Whether you’re coding algorithms or optimizing applications, knowing when to use the right structure makes all the difference. Start small, visualize often, and build your foundation strong. 💡 #DataStructures #Programming #SoftwareEngineering #LearnToCode #TechEducation

On Day 304 of the coding journey, I'm sharing my solution to LeetCode Problem 852, "Peak Index in a Mountain Array." This problem is a great test of recognizing and leveraging the monotonic property inherent in the array's structure. My video provides a clear walkthrough of the Binary Search adaptation, which is a valuable skill for technical interviews and essential for solving problems in $O(\log N)$ time. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #BinarySearch #Optimization

On Day 289 of my #300daysofcode challenge, I'm sharing my solution to LeetCode Problem 3370, "Maximum Length of Semi-Decreasing Subarrays III." This complex problem is a great test of optimization skills. My video provides a clear walkthrough of the most efficient approach (likely involving Two Pointers or a Monotonic Stack), which is a valuable skill for advanced technical interviews and a great way to think about improving time complexity. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #Optimization #300daysofcode

On Day 285 of my #300daysofcode challenge, I'm sharing my solution to LeetCode Problem 2048, "Next Greater Numerically Balanced Number." This problem requires a focused iterative search and a helper function to verify the unique "balanced" property (where each digit $d$ appears $d$ times). My video provides a clear walkthrough of this logical method, a valuable skill for any developer and a great way to practice writing clean, reusable validation code. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #ProblemSolving #300daysofcode

On Day 287 of my #300daysofcode challenge, I'm sharing my solution to LeetCode Problem 2125, "Number of Laser Beams in a Bank." This problem is an excellent example of a linear-time problem that requires careful state tracking. My video provides a clear walkthrough of this efficient method, which is a valuable skill for any developer and a great way to practice writing clean, logical code. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #ProblemSolving #300daysofcode

On Day 302 of the coding journey, I'm sharing my solution to LeetCode Problem 528, "Random Pick with Weight." This problem requires designing a data structure for weighted random selection. My video provides a clear walkthrough of the optimal strategy: using a Prefix Sums array to map weights to cumulative ranges, then performing a fast Binary Search to find the corresponding index. This is a valuable skill for system design and advanced data structure implementation. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #BinarySearch #PrefixSums

On Day 288 of my #300daysofcode challenge, I'm sharing my solution to LeetCode Problem 3354, "Maximum Length of Semi-Decreasing Subarrays II." This problem requires optimizing a brute-force approach. My video provides a clear walkthrough of the efficient Two-Pointer technique (or Monotonic Stack), which is a valuable skill for technical interviews and a great way to think about improving time complexity. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #Optimization #300daysofcode

On Day 292 of my #300daysofcode challenge, I'm sharing my solution to LeetCode Problem 37, "Sudoku Solver." This problem is a textbook example of a constraint satisfaction problem solved via Backtracking. My video provides a clear walkthrough of the recursive logic and the crucial board validation steps, which is a valuable skill for advanced technical interviews and mastering recursive algorithms. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #Backtracking #300daysofcode

On Day 301 of the coding journey, I'm sharing my solution to LeetCode Problem 658, "Find K Closest Elements." This problem is an excellent example of using Binary Search to quickly establish a search range, which is then refined by the Two-Pointer technique. My video provides a clear walkthrough of this efficient $O(\log N + K)$ approach, a valuable skill for technical interviews and a great way to think about optimizing array search problems. #DataStructures #Algorithms #LeetCode #CodingInterview #Programming #BinarySearch #TwoPointers