Diagonal Traversal Recovers the Message | Decode the Slanted Ciphertext | LeetCode 2075

In this video, we solve LeetCode 2075. Decode the Slanted Ciphertext using a diagonal traversal observation. The key idea is to understand how the message was encoded: • The text is written row-wise into a matrix • Then read diagonally (top-left → bottom-right) To decode it, we reverse the process: 1️⃣ Compute the number of columns using length / rows 2️⃣ Start from each column in the first row 3️⃣ Traverse diagonally using a fixed jump of (cols + 1) 4️⃣ Append characters to rebuild the original message Finally, we remove trailing spaces that were added during encoding. This gives a clean O(n) solution with simple index manipulation. This problem is part of today’s LeetCode Daily Problem of the Day (POTD). 🔹 What you’ll learn: • How diagonal traversal works in flattened matrices • Mapping 2D movement using 1D indices • Why (cols + 1) is the key step • Handling trailing spaces correctly 🔹 Topics: • Strings • Matrix Traversal • Simulation Clear problem explanation, intuition-first walkthrough, and clean Java implementation. Problem link - https://leetcode.com/problems/decode-... Java Code - https://pastebin.com/EdV6AUCW Python Code - https://pastebin.com/jkKxYJPD Time complexity - O(N) Space Complexity - O(N) Page Marker Extension - https://chromewebstore.google.com/det... Video Chapters - 00:00 - Problem Statement 05:25 - Approach 15:21 - Code 18:46 - Time and Space Complexity Leetcode daily playlist -    • LeetCode Daily Problems   LeetCode Easy POTD playlist -    • LeetCode Easy   LeetCode Medium POTD playlist -    • LeetCode Medium   LeetCode Hard POTD playlist -    • LeetCode Hard   If you want to practice daily and improve your problem-solving skills, this is the place to follow along. #leetcode #dsa #strings #matrix #simulation #leetcodeproblemoftheday #algorithm #java #python #code #leetcodechallenge #codinginterview #problemsolving