Sourav Kumar Singh

Learning DSA 🚀 | Learning Full Stack Web Dev 🌐 | On a mission to grow daily – as a coder & a human 💡
Day 27/100 challange

[Sourav Kumar Singh @03Souravsingh]

📅 Day 28 of #BetterEveryDay

✅ Circular Linked List
✅ Loop detection (Floyd + Hashing)
✅ Slow & Fast Pointer
✅ Find & remove loop
✅ Y-shaped LL intersection
✅ TC & SC of all methods

💡 Used in playlists & CPU scheduling
#DSA #LinkedList #ProblemSolving #LearningInPublic

[Sourav Kumar Singh @03Souravsingh]

📅 Day 32 of #BetterEveryDay

✅ Learned Subsequence (Pick / Not Pick).
✅ Time Complexity and Space
✅ Solved Sum problem using recursion.
✅ Solved Subset Sum problem
✅ Solved Perfect Sum problem
✅ Solved Coin Change problem
#DSA #Recursion
#LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 31 of #BetterEveryDay

✅ Applied Recursion on Array.
✅ Calculated sum of array elements using recursion.
✅ Implemented Linear Search using recursion.
✅ Checked String Palindrome using recursion.
✅ Reversed a string.
#DSA #Recursion
#LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 30 of #BetterEveryDay

✅ Learned Recursion
✅ Understood Base Condition & Call Stack
✅ Compared Iterative vs Recursive approaches
✅ Implemented Sum of N numbers using recursion
✅ Implemented Factorial using recursion
#DSA #Recursion
#LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 29 of #BetterEveryDay

✅ Studied Stack vs Heap memory
✅ Learned using new and delete keyword
✅ Understood why int arr[n] is bad practice in C++
✅ Learned about Dangling Pointers
✅ Created 1D & 2D arrays using pointers

#DSA #Pointers
#LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 28 of #BetterEveryDay

✅ Solved Longest Substring Without Repeating Characters
✅ Solved Smallest Distinct Window
✅ Implemented Roman to Integer
✅ Implemented Integer to Roman
#CodingJourney #DSA #Strings
#ProblemSolving #CPlusPlus
#LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 27 of #BetterEveryDay

✅ Solved Add Strings (large numbers)
✅ Implemented Factorial of Large Numbers
✅ Worked on Sorting a Sentence
✅ Solved Longest Palindromic
#CodingJourney #DSA #Strings
#ProblemSolving #CPlusPlus
#LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 26 of #BetterEveryDay

✅ Learned Strings & Character Arrays
✅ Practiced string declaration, initialization & storage
✅ Solved problems on case conversion, unique characters & string sorting
#CodingJourney #DSA #Strings
#CharacterArray
#LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 25 of #BetterEveryDay

✅ Practiced Prefix & Suffix Array techniques
✅ Solved Trapping Rain Water problem using optimized approach
✅ Started learning 2D Arrays

#CodingJourney #DSA #PrefixSuffix
#2DArrays #ProblemSolving
#Consistency #LearningInPublic
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 24 of #BetterEveryDay

✅ Learned Two Pointer technique in DSA
✅ Understood optimization: Brute Force → Binary Search → Two Pointers
📌 Key learnings:

• Two pointers for pair problems (sum/product/diff)

#CodingJourney #DSA #TwoPointers #LeetCode
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 23 of #BetterEveryDay

✅ Learned Binary Search in DSA
✅ Understood its Time Complexity
📌 Key learnings:
• Safe mid calculation to avoid integer overflow

💻 Solved:
• First & Last Occurrence
• Search Insert Position
#CodingJourney #DSA #LeetCode
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 22 of #BetterEveryDay

✅ Learned about Time Complexity (TC) in DSA
✅ Solved many cases to understand how TC changes with input

📌 Cleared common myths and confusion about
• Big O (O)
• Omega (Ω)
• Theta (Θ)
#CodingJourney #Consistency #DSA
@rohit_negi9

[Sourav Kumar Singh @03Souravsingh]

📅 Day 21 of #BetterEveryDay

✅ JavaScript – Memory Management
• Stack vs Heap storage
• Mutable vs Immutable data

✅ GenAI
• ChatGPT predicts next tokens
• Doesn’t perform real calculations
• Tokenization

✅ Leg Day 🔥
#strike #DSA #coderarmy #js #gym #LearnInPublic

[Sourav Kumar Singh @03Souravsingh]

📅 Day 20 of #BetterEveryDay

✅ JavaScript-dataType
•Diff between NULL and undefined
•0.1+0.2=0.3000004(learned about error)
•primitive vs non primitive

✅DSA-ifelse,operators and loops

✅pull day
#strike #DSA #coderarmy #js #gym #LearnInPublic

[Sourav Kumar Singh @03Souravsingh]

📅 Day 19 of #BetterEveryDay

✅ JavaScript – Operators & Type Conversion
✅ C++ DSA – Basics & Memory Management
• Wrote basic C++ programs and learned how data is stored in memory
#100DaysOfCode #JavaScript #CPP #DSA #LearningEveryDay

[Sourav Kumar Singh @03Souravsingh]

🚀 Just built STRIKE – a mobile-first- DSA Course Website in 6 days! 💻

✨ Features: DSA Sheet with user profiles & multi-page layout.

🔗 Site: https://t.co/8w2ByLF7wu

🙏 Huge thanks to @rohit_negi9 bhaiya for guidance

#STRIKEClone #HTMLCSSOnly #WebClone #CSSChallenge

[Sourav Kumar Singh @03Souravsingh]

📅 Day 18 of #BetterEveryDay

✅ JavaScript – Data Types 📝
  • Number, String, Boolean, BigInt, Null, Undefined, Symbol
  • numbers stored concept.

✅ DSA – Binary Search 🔍
    • Solved 1 LeetCode

✅ Workout – Pull Day 💪
#100DaysOfCode #WebDevelopment #JavaScript #DSA

[Sourav Kumar Singh @03Souravsingh]

📅 Day 17 of #BetterEveryDay

✅ JavaScript – Getting Started ⚡
  • var, let, const
  • History of JavaScript
  • How JS works in the browser

✅ DSA – Binary Search 🔍
  • Solved 2 LeetCode problems

✅ Workout – Push Day 💪
#100DaysOfCode #WebDevelopment #JavaScript #DSA

[Sourav Kumar Singh @03Souravsingh]

📅 Day 16 of #BetterEveryDay

✅ CSS – Grid Layout 🎨
  • grid-template-rows
  • grid-template-columns
  • row-gap & column-gap
  • gap property
  • built a chessboard ♟️
✅ DSA – Container STL 📦

✅ Workout – Push Day 💪
#100DaysOfCode #WebDevelopment #CSS #GridLayout #DSA

[Sourav Kumar Singh @03Souravsingh]

📅 Day 15 of #BetterEveryDay

✅ CSS – Text & Shadows ✨
• text-align
• text-decoration
• text-transform
• text-shadow
• box-shadow

✅ Workout – Leg Day 🦵💪
#100DaysOfCode #WebDevelopment #CSS #Flexbox #DSA #Consistency