Rohit Kumar

[Rohit Kumar @kumar65183]

🗓️ Day 14 – #SDESheetChallenge

✅ Maximum Consecutive Ones
✅ Remove Duplicates from Sorted Array
#DSA @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 13 – #SDESheetChallenge

✅ Rotate a Linked List

#DSA @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

Revised "Find Middle of Linked List" yesterday. Got the same problem in today's OA of IT consulting company. .

A reminder that consistent revision really works. The Striver SDE Sheet is a goldmine! 🚀
#DSA @striver_79 @takeUforward_ #SDESheetChallenge

[Rohit Kumar @kumar65183]

🗓️ Day 12 – #SDESheetChallenge

✅ Find the Starting Point of a Loop in a Linked List
(Brute Force + Tortoise & Hare method)
✅ Check if a Linked List is a Palindrome (Brute + Optimized Approach)
🔄 Revised: Find the Middle of a Linked List

#DSA @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 11 – #SDESheetChallenge

✅ Detect a Loop in Linked List
(Brute Force + Tortoise & Hare Method)

✅ Reverse Nodes in K-Group

#DSA @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 10– #SDESheetChallenge
✅Remove Nth Node From End of Linked List (Brute Force)
✅Remove Nth Node From End of Linked List (Optimal - Fast & Slow Pointers)
Thank you @striver_79 for making learning DSA much more structured and approachable
#DSA @takeUforward_ @striver_79

[Rohit Kumar @kumar65183]

@Hiteshdotcom I think there would be a huge drop in https://t.co/nGiIYdDQ4b admissions, especially in CSE. A large part of the current demand is driven by the expectation of campus placements and high-paying jobs. Without that, the hype around engineering would likely stabilize in a good way.

[Rohit Kumar @kumar65183]

🗓️ Day 9 – #SDESheetChallenge
Today's Progress:
✅ Reverse a Linked List (Iterative Approach)
✅ Reverse a Linked List (Recursive Approach)

Learned how pointer manipulation and recursion can solve the same problem in different ways.

#DSA @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 8 – #SDESheetChallenge

Solved today:
✅ Two Sum (Brute Force)
✅ Two Sum (Optimal - Return Indexes)
✅ 3 Sum (Brute Force)
✅ 3 Sum (Better)
#DSA #Java @takeUforward_ @striver_79

[Rohit Kumar @kumar65183]

🗓️ Day 7 – #SDESheetChallenge
✅ Solved: Majority Element II
Find all elements that appear more than ⌊n/3⌋ times in the array.
Brute Force → O(n²)
HashMap Approach → O(n) Time, O(n) Space
Optimal Approach → Extended Moore's Voting Algorithm

#DSA @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 6 – #SDESheetChallenge

✅ Pow(x, n)
Learned Binary Exponentiation
Reduced time complexity from O(n) to O(log n)
✅ Majority Element
Explored Brute Force, HashMap, and Moore's Voting Algorithm

#DSA #Java #SDESheetChallenge @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 5 – #SDESheetChallenge

✅ Search in a 2D Matrix

Learned how to optimize from O(m×n) brute force to O(m log n) using Binary Search.

#DSA #Java #LeetCode @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 4 – #SDESheetChallenge

Today's progress:
✅ Find the Duplicate Number
I spent extra time understanding the approach and solution.
Remaining:
⏳ Find the Repeating and Missing Number
⏳ Inversion of Array

Will continue tommorow.
@takeUforward_ @striver_79

[Rohit Kumar @kumar65183]

Day 3 of the #SDESheetChallenge

✓ Rotate matrix by 90 degrees
✓ Merge Overlapping Subintervals
✓ Merge two sorted arrays without extra space

🔗 Sheet Link: https://t.co/bmzqsDCSEE
#SDESheetChallenge @striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

🗓️ Day 2 – #SDESheetChallenge

📚 Topic: Arrays

✅ Kadane's Algorithm
✅ Sort an Array of 0s, 1s and 2s
✅ Stock Buy and Sell

🔗 Sheet Link: https://t.co/bmzqsDCSEE

#DSA #StriversSDEsheet #45DaysOfCode

@striver_79 @takeUforward_

[Rohit Kumar @kumar65183]

✅ Day 1 Completed – #SDESheetChallenge

Today's learnings:
• Modifying data during traversal can lead to incorrect results.
• Extra space can often be reduced by reusing existing data structures.
• Set Matrix Zeroes ✅
• Need to revisit Next Permutation
@takeUforward_

[Rohit Kumar @kumar65183]

Challenge Accepted!
Starting my #SDESheetChallenge journey today.
Goal: Stay consistent, solve problems daily, and strengthen my DSA fundamentals.
Day 0 ✅
@takeUforward_
#TakeUForward #DSA #Coding