SUMIT KUMAR

Engineer | Web Dev & AI Enthusiast | Sharing code & creativity | Let’s build the future

[SUMIT KUMAR @AIDev_Sumit]

Day 12 of #SDESheetChallenge by
@takeUforward_
@striver_79
Today's problems: -
Check if LL is palindrome -
Find starting point of cycle -
Flatten a LL 1

[SUMIT KUMAR @AIDev_Sumit]

Day 11/45 of the #SDESheetChallenge

🚀Day 11 #SDESheetChallenge| Linked List II
1. Find the intersection point of Y LL✅

2. Detect a loop in LL✅

3. Reverse LL in group of given size K✅

@striver_79 @takeUforward_

[SUMIT KUMAR @AIDev_Sumit]

Day 10/45 of the #SDESheetChallenge 🚀📚 Linked List Day
✅ Remove Nth Node From End of List
✅ Add Two Numbers (Linked List)
✅ Delete Node in a Linked List (O(1))
#LinkedList #Cpp #Coding #Programming #SoftwareEngineer #100DaysOfCode #StriverSDEsheet #InterviewPreparation

[SUMIT KUMAR @AIDev_Sumit]

Day 9/45 of the #SDESheetChallenge 🚀Today's Linked List grind:
✅ Reverse a Linked List
✅ Find Middle of Linked List
✅ Merge Two Sorted ListsKey concepts covered:
#LinkedList #LeetCode #Cpp #Programming #SoftwareEngineer #100DaysOfCode #InterviewPreparation @striver_79

[SUMIT KUMAR @AIDev_Sumit]

Day 8/45 of the #SDESheetChallenge 🚀

Solved 3 important problems today:

✅ Largest Subarray with Sum K
✅ Count Subarrays with XOR = K
✅ Longest Substring Without Repeating Characters
#DSA #LeetCode #Coding #CPP #InterviewPrep #100DaysOfCode #StriverSDEsheet #ProblemSolving

[SUMIT KUMAR @AIDev_Sumit]

Day 7/45 of the #SDESheetChallenge 🚀

Solved 3 problems today:

✅ Two Sum
✅ 4 Sum
✅ Longest Consecutive Sequence in an Array

#DSA #LeetCode #CPP #Coding #100DaysOfCode #Programming #InterviewPrep #StriverSDEsheet #SoftwareEngineer #CodeNewbie

[SUMIT KUMAR @AIDev_Sumit]

Day 6/45 of the #SDESheetChallenge 🚀

✅ Majority Element II
✅ Grid Unique Paths
✅ Reverse Pairs
Learned:
• Moore's Voting Algorithm
• Dynamic Programming
• Merge Sort for counting pairs
#DSA #LeetCode #CPP #Coding

[SUMIT KUMAR @AIDev_Sumit]

Day 5/45 of the #SDESheetChallenge 🚀

Solved today:
✅ Search in a 2D Matrix
✅ Pow(x, n)
✅ Majority Element-I
Learned:
• Binary Search on Matrix
• Binary Exponentiation
• Moore's Voting Algorithm
3 more steps forward. Consistency is the goal. 💪
#DSA #LeetCode #CPP

[SUMIT KUMAR @AIDev_Sumit]

Day 4/45 of the #SDESheetChallenge 🚀

✅ Find the Duplicate Number
✅ Find the Repeating & Missing Number
✅ Inversion of Array
Learned Floyd's Cycle Detection, Array Math Tricks, and Merge Sort for Inversion Counting.
#DSA #LeetCode #CPP #takeUforward @striver_79

[SUMIT KUMAR @AIDev_Sumit]

Day 3/45 of the #SDESheetChallenge 🚀

✅ Rotate Matrix by 90 Degrees
✅ Merge Overlapping Intervals
✅ Merge Two Sorted Arrays Without Extra Space

@striver_79 @takeUforward_

#DSA #LeetCode #Cpp #Coding

[SUMIT KUMAR @AIDev_Sumit]

Day 2/45 of the #SDESheetChallenge 🚀

✅ Kadane's Algorithm
✅ Sort 0s, 1s & 2s
✅ Stock Buy and Sell

Arrays completed.

@striver_79 @takeUforward_

#DSA #LeetCode #Cpp

[SUMIT KUMAR @AIDev_Sumit]

Day 1/45 ✅ #SDESheetChallenge
Solved: 🔹 Set Matrix Zeroes 🔹 Pascal's Triangle I 🔹 Next Permutation
Key takeaway: Thinking about patterns and edge cases before coding saves time.
Thanks @striver_79 🚀
#DSA #LeetCode #takeUforward

[SUMIT KUMAR @AIDev_Sumit]

Day 0/45 🚀

Accepted the #SDESheetChallenge by @striver_79.

Committing to 45 days of consistent DSA practice, learning, and progress updates.

Let's see how much I can improve. 💪

#LeetCode #DSA #Coding #takeUforward

[Hitesh Choudhary @Hiteshdotcom]

First dev job? Avoid the "wrong branch" disaster:

Mastering situational Git is a must for every intern. Video is up at Chaicode youtube channel, attendance laga aao

[SUMIT KUMAR @AIDev_Sumit]

🔥 Day 100/100 — I DID IT! 💯💪
I came. I coded. I conquered. 💻🔥
100 days of progress, passion, and persistence.
Let’s build bigger, better, bolder! 🚀
#100DaysOfCode #CodingJourney

[SUMIT KUMAR @AIDev_Sumit]

Day 99/100 #LeetCode 🚀
🧩 Problem: LRU Cache
Design a cache with get() & put() in O(1) using HashMap + Doubly Linked List.
Move recently used → front, evict least used → end.
Smart memory + speed combo! ⚡
#100DaysOfCode #CPP #Coding

[SUMIT KUMAR @AIDev_Sumit]

Day 98/100 — #100DaysOfCode 🚀
Solved “Set Mismatch” on LeetCode 💻
Goal: Find the duplicate & missing numbers from 1–n.
Used a frequency array to count occurrences → found duplicate & missing easily.
⏱ O(n) time | 💾 O(n) space
Next: Optimize to O(1)! 🔥
#LeetCode #CPlusPlus

[SUMIT KUMAR @AIDev_Sumit]

Day 97 of #100DaysOfCode 💻
Solved “Basic Calculator II” on LeetCode 🔢
🧠 Learned how to handle operator precedence using a stack and perform division truncating toward zero.
⚙️ Runtime: 7ms (Beats 66.18%)
💾 Memory: 16.71 MB (Beats 13.04%)

#LeetCode #CPlusPlus #CodingJourney

[SUMIT KUMAR @AIDev_Sumit]

🚀 Day 96 Progress!

Code, coffee, repeat ☕💻
Today's wins: tackled tricky algorithms & leveled up problem-solving skills. Every small step counts! 💡
#CodingJourney #100DaysOfCode #DeveloperLife #Day96

[SUMIT KUMAR @AIDev_Sumit]

🧠 Day 95 of #100DaysOfCode
Solved “Number of Islands” 🌊 problem on LeetCode using DFS in C++ 🧩
✅ Runtime: 28 ms (beats 50%)
✅ Memory: 16.33 MB (beats 69%)
🔥 Learned how to traverse connected components efficiently!

#LeetCode #Coding #Cplusplus #DSA #100DaysOfCode