🔗 Navigation Help for My #100DaysOfCode Journey.If a link opens the README instead of the right file:.➡️ Scroll to the Progress Tracker.📅 Select the correct Day folder.✅ Everything’s organized & updated daily!. 🔗 Repo: #100DaysOfCode #DSA #CodeNewbie.

🛠️ Backtracking Practice – Day 19 #100DaysOfCode. Solve:.🧩 Sudoku Solver.♛ N-Queens Problem.💻 Java Code:.#Java #DSA #Coding #Backtracking.

🚀 Backtracking in Java – Day 19 #100DaysOfCode.🧠 Learn to:.✔️ Explore all options.✔️ Prune bad paths.✔️ Use recursion & undo steps.📌 Includes:.• Real-life analogy.• Call stack flow.• Subsets & permutations patterns.📚 Notes:.#Java #DSA #Backtracking.

🚀 Day 18 of #100DaysOfCode. Solved 2 classic recursion problems today:. 1️⃣ Tiling a n x m floor with 1 x m tiles.2️⃣ Ways to call guests (single or paired).Both use elegant recurrence logic. 👨‍💻 Practice + dry runs + notes:.🔗 #Java #DSA #Recursion.

🧠 Day 17 of #100DaysOfCode. Solved 2 advanced recursion problems:.1️⃣ Permutations.2️⃣ Unique paths in a grid (maze).Strengthened my recursion tree thinking & backtracking skills. Code + dry runs + explanations 👇.📂 #Java #DSA #Recursion #BuildInPublic.

Day 16 of #100DaysOfCode.Solved 4 classic problems:.• Move all 'x' to end.• Remove duplicates.• Check if array is sorted.• Tower of Hanoi 🔁. Focused on flow, not just answers. 📎 #Java #DSA #Recursion #Coding #DevJourney #CodeNewbie.

🌀 Recursion = patterns + power. Day 15 of #100DaysOfCode.Solved:.• All subsequences.• Unique ones.• Keypad combos.• Reverse string.• First/Last index. Base cases, branching, returns — all clear ✅.📎#Java #DSA #Recursion #Coding #CodeNewbie.

🧠 Practiced recursion today — the real learning starts here!. Day 14 of #100DaysOfCode. ✅ Factorial.✅ Fibonacci.✅ Print 1–N.✅ Sum (standard + tail).📂 Includes PythonTutor-ready code!.🔗 #Java #DSA #Recursion #CodeNewbie #TechTwitter #100DaysChallenge.

🔁 Recursion isn’t magic — it’s just functions calling themselves!.📅Day 14 of #100DaysOfCode.🧱 Stack memory flow.↩️ Return paths and fallback.🎯 Why base cases really matter.📎 Notes:. #Java #DSA #CodeNewbie #TechTwitter #100DaysChallenge #Recursion.

📊 Sorting in Java — Day 13 of #100DaysOfCode. ✅ Bubble Sort.✅ Selection Sort.✅ Insertion Sort.🕒 Time: O(n²) worst case.No practice folder — logic stays the same, only input changes. 📘 Notes + Code:. #Java #DSA #JavaWithDSA #LearnToCode #DevJourney.

🧠 Bit Manipulation in Java — Day 12 of #100DaysOfCode. Learned how to:.✔️ Get a bit.✔️ Set a bit.✔️ Clear a bit.✔️ Update a bit.📚 Notes:. 💻 Code:. #Java #DSA #CodeNewbie #BuildInPublic.

Day 11 of #100DaysOfCode 💻.Solved string problems using StringBuilder 👇.✅ Extract username from email.✅ Replace 'e' with 'i'.✅ Reverse string (no reverse()).✅ Count characters (excluding spaces).📂 Code.#Java #DSA #CodeNewbie #LearnToCode #DevJourney.

Struggling with slow string operations in Java? 😩. On Day 11 of #100DaysOfCode, I learned StringBuilder — faster & efficient!. ✅ setCharAt.✅ insert.✅ delete.✅ append.✅ Rewrote Day 10 problems with it!.📂 Notes:.#Java #DSA #LearnToCode #CodeNewbie.

🧠 String Practice — Day 10 of #100DaysOfCode. Solved:.✅ Extract username from email.✅ Replace 'e' with 'i'.✅ Reverse string using StringBuilder.✅ Count total characters (excluding spaces).🧩 Code →. #Java #DSA #Coding #100DaysChallenge #CodeNewbie.

🔤 Strings in Java — Day 10 of #100DaysOfCode. Today I learned:.✅ String input (next() vs nextLine()).✅ concat, length, charAt.✅ compareTo & substring.✅ Immutability & type conversion.📚 Notes →. #Java #DSA #Coding #100DaysChallenge #CodeNewbie.

🧪 Day 09 Practice – Arrays in Java.Solved key problems using arrays:.✔️ Check if array is sorted.✔️ Find max & min.✔️ Search element in 1D/2D array.✔️ Matrix transpose & print. and many more. 🔗 Code →.#100DaysOfCode #Java #DSA #Coding #CodeNewbie.

🔢 Arrays in Java — Day 09 of #100DaysOfCode. Today I learned:.✅ 1D & 2D array declaration.✅ Input/output using loops.✅ Matrix basics & common errors.📚 Notes →.#Java #DSA #Coding #100DaysChallenge #CodeNewbie.

🧠 Day 08 of #100DaysOfCode.Learned Time & Space Complexity ⏱🧮.✅ Performance analysis.✅ Big-O notations.✅ Efficiency tips.From tomorrow, I’ll calculate complexity for every problem I solve! 📈.📄 Notes: #Java #DSA #CodeNewbie #100DaysOfCodeChallenge.

🔁 Practicing is where the real learning happens!. On Day 07 of #100DaysOfCode, I solved key Function-based problems to build logic & confidence 💪. 🧩 Topics covered:.✔️ Sum.✔️ Factorial.✔️ GCD. and more!.📂 Practice Code 👇:.#Java #DSA #CodingPractice.

🧠 Want to teach your code to do tasks on command?. That's where Functions come in!. 🔹 Day 07 of #100DaysOfCode.✅ Function creation.✅ Parameters & return.✅ Why/when to use them.📂 Code + Notes:.#Java #DSA #CodeNewbie #100DaysOfCodeChallenge.