📅 Day 30 — 6 July 2025.🔁 Practiced recursion with:.✅ Tower of Hanoi.✅ Subsets (Leetcode 78).✅ Subsets II with duplicates (Leetcode 90).⚡ Benchmarked pass-by-value vs reference.🔍 Ref = 5x faster, Value = cleaner.#Cplusplus #DSA #Recursion #100DaysOfCode #Leetcode

📅 Day 27, 28, 29.🗓️ 1 July 2025.✅ Practiced recursion deeply:. Pre/In/Post pattern (O(2ⁿ)). Remove 'a' from string (O(n)). LeetCode 344 – Reverse String (two-pointer, recursion, extra space). Every day = stronger logic 💪.#100DaysOfCode #DSA #Cplusplus #Recursion #LeetCode

📍Day 25 & 26.📅 28 June 2025.🧠 Practiced Recursion with the classic Maze Path Problem in C++.✅ Counted total ways from (1,1) to (3,3).✅ Printed all paths using just recursion, no DP.Sample paths:. RRDD, RDRD, RDDR, DRRD, DRDR, DDRR.💡 Learned:.#100DaysOfCode #Recursion #DSA

📅 Day 23 & 24.🗓️ 26 June 2025.Practiced recursion:.• Factorial.• Power (a^b).• Fibonacci.• Climbing Stairs (Leetcode 70 – recursive). Recursion getting clear 🔁.#100DaysOfCode #CPP #DSA #Recursion #Leetcode70

📘 Day 22 – #100DaysOfCode.🔍 Learned how to analyze and optimize Time & Space Complexity in C++.💡 Solved Leetcode 2207 – Find All K-Distant Indices in an Array.✅ Improved space efficiency by removing extra arrays.#Leetcode #CPP #DSA #CodingJourney #CodeNewbie

Day 21 – 23 June 2025.✔️ Learned Time & Space Complexity.✔️ Compared 4 methods to find duplicates.✔️ Solved:.• Leetcode 205 – Isomorphic Strings.• Leetcode 217 – Contains Duplicate.Explored 442 next 👨‍💻.#100DaysOfCode #DSA #CPlusPlus

Day 19 & 20 – #100DaysOfCode.📅 22 June 2025.Due to a sudden power cut in my village, I couldn't post daily. ✅ Used stringstream for word splitting.✅ Learned stoi vs stoll.✅ Found most frequent word in a sentence.✅ Solved Longest Common Prefix (Leetcode).#CPlusPlus #Coding

Day 16, 17 & 18 – #100DaysOfCode.📅 20 June 2025.The last 3 days have been all about strings in C++!.🔹 Solved multiple string problems (screenshot says it all 😄).🔹 Practiced character frequency, indexing, and built-in functions.#Cplusplus #Leetcode #DSA #LearningInPublic

Day 15 – 17 June 2025 #100DaysOfCode.🔍 Solved Leetcode 240: Search a 2D Matrix II.Used the top-right corner approach for fast search in O(m + n) time. Clean and efficient for sorted 2D matrices!.Back to code grind now that exams are over! 💻🔥.#LeetCode #Coding #100daysofcode

Day 14 – June 16, 2025.🎓 Exams over — back to coding grind! 💪.🚀 Solved LeetCode 861: Score After Flipping Matrix.👉 Focused on flipping rows & columns smartly.✨ Used binary row scores to maximize the sum.#100DaysOfCode #LeetCode #Cplusplus #ProblemSolving #CodeNewbie

Hi everyone! 👋.Just a quick update — I’ll be taking a break from June 4 to June 14, 2025, as I prepare for my upcoming examinations, which will take place from June 5 to June 14. Thank you for your understanding and support. I’m looking forward to being back soon! 🙏.

Day 13 – #100DaysOfCode.Solved LeetCode 118: Pascal's Triangle ✅.Practiced 2D vectors, loops, and pattern generation in C++. Learning how to build logic cleanly and efficiently!.#LeetCode #DSA #365DaysofCoding

Day 12 – 2 June 2025#100DaysOfCode.Today, I played around with printing 2D matrices in zigzag style (row-wise & column-wise)—super fun once you get the pattern!.That helped me finally crack Leetcode 54: Spiral Matrix .Turns out spiral is just zigzag in 4 directions!.#Coding #DSA

📅Day 11 – June 1, 2025.Today I learned how to multiply two 2D matrices using C++! 🧠.✅Used vector<vector<int>> to dynamically store matrices.✅Applied triple loop for matrix multiplication logic.✅Optimized for sparse matrices (skipped 0s to boost performance).#365DaysOfCode

📅 Day 10 – May 31, 2025.Today I learn how to transpose a matrix without extra space by swapping elements across the diagonal.Then I use that trick to solve LeetCode 48 (Rotate Image).First, I do it manually (swap + reverse rows).Then I use reverse() from STL — much cleaner .#DSA

🗓️ Day 8 – May 29, 2025.❌ Unable to study due to a sudden cold. 🛌 Took rest. 🗓️ Day 9 – May 30, 2025.Solved basic 2D matrix problems:.Find maximum element.Find minimum element.Compute sum and product of elements.Perform transpose operation.Solved LeetCode 867 – Transpose Matrix

Day 7 – May 27, 2025.Revisiting 2D arrays in C++ today:.Explored different ways to declare & initialize.Solved for max & min values (both with and without built-ins).Sharpened my nested loops & comparison logic.Great way to reinforce DSA fundamentals! .#DSA #365DaysofCoding

📅 Day 6 – May 27, 2025.Just solved the Trapping Rain Water problem on LeetCode(42)!.Started with the prefix/suffix max approach, then optimized it to a two-pointer solution 💡.✅ O(n) time, O(1) space.#LeetCode #DSA #Cplusplus #CodingInterview #100DaysOfCode #ProblemSolving

Day 5: May 26, 2025.Just solved LeetCode 31: Next Permutation.Steps:.1. Find pivot: first i from right where nums[i] < nums[i+1]. 2. If not found, reverse the array.3. Else: swap with just larger element on right, then reverse suffix.Sample: [1,3,2] → [2,1,3].#LeetCode #DSA

Day 4: May 25, 2025.Today, I solved a new LeetCode problem .LeetCode 88 – Merge Sorted Array. #LeetCodeChallenge #Sorting #Coding #100Days