🔥 Welcome back Coders! In today’s video, we solve LeetCode 3446 | Sort Matrix by Diagonals 🔺 explained in the most simple and beginner-friendly way 🚀.
👉 Problem Statement:
We are given an n x n square matrix. We need to sort its diagonals in such a way that:
The diagonals in the bottom-left triangle (including main diagonal) are sorted in non-increasing order.
The diagonals in the top-right triangle are sorted in non-decreasing order.
💡 In this video, you’ll learn:
✅ How to identify diagonals using (row - col) as a key
✅ Sorting diagonals differently based on their position (upper vs lower triangle)
✅ Efficient use of map + sorting in C++
✅ Step-by-step explanation of the code with examples
✅ Useful matrix problem-solving techniques for interviews
⚡ Why watch this video?
This problem teaches you:
Matrix traversal techniques
Handling diagonals smartly with hashing (row-col key)
Sorting with conditions (ascending vs descending)
Clean and efficient C++ coding style
📄 Problem Link:
🔗https://leetcode.com/problems/sort-matrix-by-diagonals/description/
💻 Solution Code with Comments on GitHub:
🔗 https://github.com/Rajat-1204/Leetcode_POTD/blob/main/3466_28_AUG.cpp
🖥️ Code used in this video:
We implement the solution in C++ using map + sorting, making the approach clean and efficient.
✨ Don’t forget to LIKE 👍, COMMENT 💬, and SUBSCRIBE 🔔 for daily LeetCode solutions and DSA interview preparation content.
📌 Hashtags for SEO
#LeetCode #LeetCode3446 #SortMatrixByDiagonals #MatrixProblem #LeetCodeMedium #C++ #DynamicProgramming #DSA #CodingInterview #LeetCodeSolution #CodingForBeginners #Programming #PlacementPreparation #CompetitiveProgramming #DSASimplified
