Day 9 | Array Prefix Sum and Frequency🚀DSA Problem Solving in Python | 100 Days DSA Challenge 🐍 скачать в хорошем качестве

Day 9 | Array Prefix Sum and Frequency🚀DSA Problem Solving in Python | 100 Days DSA Challenge 🐍

🚀 100 DAYS DSA CHALLENGE – DAY 9 🚀 Welcome to Day 9 of the DSA journey 🧠🐍 Today’s session focuses on prefix sum and frequency based array problems, which are extremely important patterns in coding interviews and real DSA problem solving 💡 These patterns help convert slow brute force solutions into efficient optimized algorithms and are widely used in array, subarray, and hashing problems. 🎯 Day 9 Focus Areas Array prefix sum technique Cumulative sum patterns Frequency counting using arrays and dictionaries Hashing based optimizations Avoiding nested loops using prefix logic Time and space complexity awareness 🛠️ Problems to Solve During the Live Prefix Sum of Array Find Pivot Index Subarray Sum Equals K Contiguous Array Frequency of Elements Majority Element Find All Numbers Disappeared in an Array Optional if time permits Product of Array Except Self 🧠 DSA Mindset for Day 9 Identify repeated calculations Store results instead of recomputing Use prefix sum to optimize solutions Use frequency maps effectively Always analyze time and space complexity 🎯 Why Day 9 Is Important Prefix sum reduces unnecessary computations 🔥 Frequency logic appears in many interview problems 🔥 Strong foundation for sliding window techniques 🔥 Improves speed and confidence in DSA rounds 🔥 🔗 Connect With Me GitHub https://github.com/itzdineshx LinkedIn   / dinesh-xo   Portfolio https://itzdineshx.github.io/portfolio/ Startup https://www.thenamsoftwaresolutions.com/ 🔥 Patterns matter more than problems 🔥 Master prefix sum and frequency to unlock DSA 👉 Like Share Subscribe 👉 Turn on bell icon 🔔 for daily DSA lives Let’s build efficient solutions using smart DSA patterns 💪🧠🐍 #100daysdsa #pythonlive #pythonadvanced #newyear #newyear2026 #dkverse #ai #machinelearning #datastructures #datastructuresandalgorithms #aiengineering #exceptionhandling #filehandling #multithreading #pythonapi #RequestsLibrary #pyqt5 #desktopapp #BackendPython #RealWorldPython #livecoding #problemsolving #buildinpublic #techstudent #aistudent #futureengineer 🐍🔥💻🚀