Shifting Letters II | Leetcode 2381 | Difference Array Technique: Concepts & Questions - 2 | MIK

iPad PDF Notes Link - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/iPad%20PDF%20Notes/Leetcode-2381-Shifting%20Letters%20II.pdf Whatsapp Community Link : https://www.whatsapp.com/channel/0029Va6kVSjICVfiVdsHgi1A Hi Everyone, this is the 2nd video of our Playlist "Difference Array Technique : Concepts & Questions". We have already studied powerful Difference Array technique - Now we will be solving a very good problem based on it - Shifting Letters II | Leetcode 2381 | Difference Array Technique: Concepts & Questions - 2 | codestorywithMIK Problem Name : Shifting Letters II | Leetcode 2381 | Difference Array Technique: Concepts & Questions - 2 | codestorywithMIK Company Tags : Will update later My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Arrays/Difference%20Array%20Technique/Shifting%20Letters%20II.cpp Leetcode Link : https://leetcode.com/problems/shifting-letters-ii My DP Concepts Playlist : https://youtu.be/7eLMOE1jnls My Graph Concepts Playlist : https://youtu.be/5JGiZnr6B5w My Segment Tree Concepts Playlist : https://www.youtube.com/watch?v=k99r1A7krcY&list=PLpIkg8OmuX-K1qUIQToCllUO0UIKXt8dB My Recursion Concepts Playlist : https://www.youtube.com/watch?v=pfb1Zduesi8&list=PLpIkg8OmuX-IBcXsfITH5ql0Lqci1MYPM Difference Array Technique Concepts & Questions : https://www.youtube.com/watch?v=ZHNVmtm08WY&list=PLpIkg8OmuX-Kqkb8DqDe_4-Tiav6ilS_L My GitHub Repo for interview preparation : https://github.com/MAZHARMIK/Interview_DS_Algo Instagram : https://www.instagram.com/codestorywithmik/ Facebook : https://www.facebook.com/people/codestorywithmik/100090524295846/ Twitter : https://twitter.com/CSwithMIK Subscribe to my channel : https://www.youtube.com/@codestorywithMIK ╔═╦╗╔╦╗╔═╦═╦╦╦╦╗╔═╗ ║╚╣║║║╚╣╚╣╔╣╔╣║╚╣═╣ ╠╗║╚╝║║╠╗║╚╣║║║║║═╣ ╚═╩══╩═╩═╩═╩╝╚╩═╩═╝ Video Summary : This solution efficiently handles multiple range-based character shifts on a string using a difference array technique: Difference Array Construction: A diff array is initialized to record the net effect of all shifts at each position. For each range [start, end] in shifts: If the shift direction is forward (1), increment diff[start] and decrement diff[end + 1] (if within bounds). If the direction is backward (0), decrement diff[start] and increment diff[end + 1] (if within bounds). Prefix Sum Calculation: The diff array is converted into a cumulative prefix sum, which gives the net shift effect for each character in the string. Apply Shifts to the String: For each character in the string: Calculate the effective shift by taking diff[i] % 26 (to handle wrap-around within the alphabet). Adjust negative shifts to positive by adding 26. Apply the shift to the character using modular arithmetic to ensure the result stays within valid alphabetic bounds. ✨ Timelines✨ 00:00 - Introduction 0:21 - Motivation 0:44 - Problem Explanation 5:22 - Thought Process and why Difference Array Technique 14:55 - Example Dry Run 19:50 - Important Part - How to apply shifts 25:41 - Corner Case 30:18 - Coding it up #MIK #mik #Mik #coding #helpajobseeker #easyrecipes #leetcode #leetcodequestionandanswers #leetcodesolution #leetcodedailychallenge #leetcodequestions #leetcodechallenge #hindi #india #coding #helpajobseeker #easyrecipes #leetcode #leetcodequestionandanswers #leetcodesolution #leetcodedailychallenge #leetcodequestions #leetcodechallenge #hindi #india #hindiexplanation #hindiexplained #easyexplaination #interview#interviewtips #interviewpreparation #interview_ds_algo #hinglish #github #design #data #google #video #instagram #facebook #leetcode #computerscience #leetcodesolutions #leetcodequestionandanswers #code #learning #dsalgo #dsa #coding #programming #100daysofcode #developers #techjobs #datastructures #algorithms #webdevelopment #softwareengineering #computerscience #pythoncoding #codinglife #coderlife #javascript #datascience #leetcode #leetcodesolutions #leetcodedailychallenge #codinginterview #interviewprep #technicalinterview #interviewtips #interviewquestions #codingchallenges #interviewready #dsa #hindi #india #hindicoding #hindiprogramming #hindiexplanation #hindidevelopers #hinditech #hindilearning #helpajobseeker #jobseekers #jobsearchtips #careergoals #careerdevelopment #jobhunt #jobinterview #github #designthinking #learningtogether #growthmindset #digitalcontent #techcontent #socialmediagrowth #contentcreation #instagramreels #videomarketing #codestorywithmik #codestorywithmick #codestorywithmikc #codestorywitmik #codestorywthmik #codstorywithmik #codestorywihmik #codestorywithmiik #codeistorywithmik #codestorywithmk #codestorywitmick #codestorymik #codestorwithmik