Harsh Kumar

Just code. Learn. Build. Repeat.

[Harsh Kumar @workharsh99]

Just completed my Expense Tracker project!

A full-stack MERN application featuring expense tracking, budgeting, analytics, and financial health monitoring.

website link: https://t.co/iNbPhvGwnV

#MERNStack #React #NodeJS #MongoDB #JavaScript #PortfolioProject #100DaysOfCode

[Harsh Kumar @workharsh99]

@adahstwt Startup

[Harsh Kumar @workharsh99]

Today’s DSA grind ✅

✔️ Sliding Window Maximum
✔️ Min Stack
✔️ Monotonic Queue concepts
Finally understanding how Deque helps optimize problems from O(n*k) → O(n) 🚀
@rohit_negi9 @CoderArmy
#Coding #LeetCode #CPP

[Harsh Kumar @workharsh99]

Today I solved:
🔹 First Non-Repeating Character in Stream
🔹 Deque operations implementation
Slowly becoming comfortable with queues & deques 💪
@rohit_negi9 @CoderArmy
#100DaysOfCode #CPP

[Harsh Kumar @workharsh99]

Today’s grind ✅
✔️ Generate Binary Numbers
✔️ Stack using Queues
✔️ Queue using Stacks
✔️ First Negative in Every Window
@rohit_negi9 @CoderArmy
#DSA #CPP #100DaysOfCode

[fidexCode @fidexcode]

Let's get the new week started

[Harsh Kumar @workharsh99]

Today’s DSA grind 🔥
✔️ Queue Reversal
✔️ Reverse First K Elements
✔️ Queue implementation concepts
Slowly connecting all DSA patterns together 🧠⚡
@rohit_negi9 @CoderArmy
#DSA #100DaysOfCode

[Harsh Kumar @workharsh99]

Today’s DSA grind 🔥
✔️ Next Greater Element II
✔️ Next Smaller Element
✔️ Previous Greater Element
✔️ Largest Rectangle in Histogram
Monotonic stacks finally starting to click 🧠⚡
@rohit_negi9 @CoderArmy
#DSA #100DaysOfCode

[Harsh Kumar @workharsh99]

Today’s grind 🔥
Solved multiple stack problems:
✅ Valid Parentheses
✅ Backspace String Compare
✅ Bracket Number
✅ String Manipulation
Slowly understanding patterns instead of memorizing solutions 💡
@rohit_negi9 @CoderArmy
#DSA #CodingJourney

[Harsh Kumar @workharsh99]

Stack fundamentals → DONE ✅
✔️ Implemented stack using array
✔️ Insert element at bottom
Understanding > Memorizing 🔥
@CoderArmy @rohit_negi9
#DSA #100DaysOfCode

[Harsh Kumar @workharsh99]

@suni_code 8GB

[Harsh Kumar @workharsh99]

Solved Merge Two Sorted Lists ✅
Then leveled up to Merge K Sorted Lists 🚀
Step by step growth.
DSA is finally making sense.
@rohit_negi9 @CoderArmy
#DSA #linkedlist

[Harsh Kumar @workharsh99]

@md_kasif_uddin vs code

[Harsh Kumar @workharsh99]

Cycle Detection 🔁
Doubly Linked List 🔗
Pointers getting stronger 💪
@rohit_negi9 @CoderArmy
#DSA #LeetCode

[Harsh Kumar @workharsh99]

Linked List + LeetCode
Reverse • Palindrome • Cycle detection
Pointers level up
@rohit_negi9 @CoderArmy
#DSA #CodingJourney #LeetCode

[Shruti @sukoooonnn]

Minimum experience

[Harsh Kumar @workharsh99]

Linked List problems 🔥
Delete Node • Middle Node (slow-fast)
Pointers doing magic 💡
@rohit_negi9
@CoderArmy
#DSA #CodingJourney #LinkedList

[Harsh Kumar @workharsh99]

Linked List basics 🔥
Node creation • Insert • Traverse
Pointers in action 💡
@rohit_negi9 @CoderArmy
#DSA #CodingJourney #LinkedList

[Harsh Kumar @workharsh99]

Pointers in depth 🔥
Stack vs Heap • Dynamic memory • Vector
Now memory actually makes sense 💡
@rohit_negi9 @CoderArmy
#DSA #CodingJourney #Pointers

[Harsh Kumar @workharsh99]

Pointers + Memory 🔥
arr, arr+1, *(arr+i) finally makes sense
Low-level understanding unlocked 💡
@rohit_negi9 @CoderArmy
#DSA #CodingJourney #Pointers