Rahul Kumar Gupta@RahulBackDev

Backend Dev specializing in Odoo ERP customization & high-speed Python APIs (FastAPI/Flask). Engineering seamless e-commerce & data integrations. ๐Ÿ”Œ

 Noida Uttar Pradesh
Joined August 2026
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๐Ÿš€ Day 20/100 โ€” DSA Streak ๐Ÿ”ฅ ๐Ÿง  Solved: LeetCode 19 โ€” Remove Nth Node From End of List ๐Ÿ’ก Takeaway: Keep a fixed gap between two pointers. When the fast pointer reaches the end, the slow pointer is at the node to remove. #DSA #LeetCode #100DaysOfDSA #TwoPointers #Day20
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๐Ÿš€ Day 19/100 โ€” DSA Streak ๐Ÿ”ฅ ๐Ÿง  Solved: LeetCode 876 โ€” Middle of the Linked List LeetCode 141 โ€” Linked List Cycle LeetCode 287 โ€” Find the Duplicate Number #DSA #LeetCode #100DaysOfDSA #TwoPointers #Day19
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๐Ÿš€ Day 18/100 โ€” DSA Streak ๐Ÿ”ฅ ๐Ÿง  Solved: LeetCode 392 โ€” Is Subsequence LeetCode 88 โ€” Merge Sorted Array LeetCode 75 โ€” Sort Colors ๐Ÿ’ก Takeaway: Two Pointers can help scan, merge, and rearrange arrays efficiently while avoiding unnecessary extra space. #DSA #LeetCode #100DaysOfDSA
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๐Ÿš€ Day 17/100 โ€” DSA Streak ๐Ÿ”ฅ ๐Ÿง  Solved: LeetCode 283 โ€” Move Zeroes LeetCode 27 โ€” Remove Element ๐Ÿ’ก Takeaway: Use Two Pointers to process the array in-place while keeping the required elements and avoiding extra space. #DSA #LeetCode #100DaysOfDSA #TwoPointers #Day17
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๐Ÿš€ Day 16/100 โ€” DSA Streak ๐Ÿ”ฅ ๐Ÿง  Solved: LeetCode 26 โ€” Remove Duplicates from Sorted Array ๐Ÿ’ก Takeaway: Since the array is sorted, use two pointers to keep unique elements in-place without extra space. #DSA #LeetCode #100DaysOfDSA #TwoPointers #Day16
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๐Ÿš€ Day 15/100 โ€” DSA Streak ๐Ÿ”ฅ ๐Ÿง  Solved: LeetCode 11 โ€” Container With Most Water ๐Ÿ’ก Takeaway: Area = width ร— shorter height. Since width decreases, move the shorter side to find a taller boundary and maximize the area. #DSA #LeetCode #100DaysOfDSA #TwoPointers #Day15
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๐Ÿš€ Day 14/100 โ€” DSA Streak ๐Ÿ”ฅ ๐Ÿง  Solved: LeetCode 1 โ€” Two Sum LeetCode 15 โ€” 3Sum LeetCode 16 โ€” 3Sum Closest ๐Ÿ’ก Takeaway: Sorting + Two Pointers can reduce nested brute-force searches and make pair/triplet problems much more efficient. #DSA #LeetCode #100DaysOfDSA #CodingJourney
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