Abhishek Kumar

Hi! I am looking to #connect with people who are interested in ➡️ Software engineering ➡️ Development ➡️ Internship ➡️ Competitive Coding ➡️ Problem Solving ➡️ Technologies

Day 19/21 of Linked List Solved 2 coding problems today: 1️⃣ Flatten a Multilevel Doubly Linked List 2️⃣ Design Circular Queue Consistent progress, one problem at a time.

Day 18/21 of Linked List Solved 2 coding problems today: 1) Flatten Binary Tree to Linked List 2) Convert Sorted List to Binary Search Tree Learning how trees and linked lists connect through structure transformations

Day 17/21 of Linked List Solved 2 coding problems today: 1) Populating Next Right Pointers in Each Node II 2) Populating Next Right Pointers in Each Node Improving tree + pointer manipulation concepts step by step .

Day 16/21 of Linked List Solved two problems today: 🔹 Delete Nodes From Linked List Present in Array 🔹 Reverse Nodes in Even Length Groups

Day 15/21 of Linked List 🚀 Solved 2 coding problems today: 1) Linked List Components 2) Split Linked List in Parts

Day 14/21 of Linked List grind! Solved two more: 1) Insertion Sort List - Sorted the list using insertion sort algo. 2) Linked List Random Node - Efficient random node selection with reservoir sampling. Halfway through, let's keep crushing it!

Day 13/21 — Linked List Challenge Solved 2 problems today: 🔹 Next Greater Node In Linked List 🔹 Design Linked List Focused on traversal techniques, stack-based optimization, and strengthening implementation fundamentals.

Day 12/21 — Linked List Challenge Solved 2 problems today: 🔹 Insert Greatest Common Divisors in Linked List 🔹 Double a Number Represented as a Linked List

Day 11/21 Linked List streak on fire 🔥 Today's wins: 1) Reverse Linked List II 2)Copy List with Random Pointer Handling random pointers without losing my mind = big W 😤

Day 10/21 of Linked List grind 💪 Solved: 1. Swap Nodes in Pairs (Medium) - pointer juggling fun! 2. Reorder List (Medium) - reverse + merge combo was satisfying Two solid medium problems down. Feeling the momentum!

Day 9 / 21 Knocked out: - 1) Merge K Sorted Lists - Clone List with Random Pointer 2) Linked lists are starting to feel like old friends now 😤 Keep showing up. #DSAjourney

Day 8/21 ✅ Crushed 2 Doubly LL problems today: → Sort K-sorted Doubly Linked List → Rotate Doubly Linked List (both directions) Pointers hitting different today 🫡

Day 7/21 of grinding Solved 2 Linked List problems today: 1)Remove Duplicates from Sorted List II 2)Delete Node in a Linked List Feeling the pointer magic slowly sinking in 🔥

Day 6/21 → Linked List streak still alive! 1) Remove Nodes From Linked List 2) Merge Nodes in Between Zeros Zeros → merge → new nodes game was actually fun today 😎 Onward! 🚀

Day 5/21 of Linked List grind ✅ Solved 2 problems today: 1. Sort List (LeetCode 148) - merge sort on LL 2. Partition List (LeetCode 86) - two-pointer partition Feeling the patterns now 💪

Day 4/21 ✅ Knocked out 2 linked list problems today: • Remove Linked List Elements (dummy node + prev pointer ftw) • Palindrome Linked List (slow-fast + reverse half is still satisfying) Slowly but surely getting comfortable with LL manipulation 😤 #LeetCode #LinkedLists

Day 3/21 of Linked List grind 🔥 Solved: 1) Intersection of Two Linked Lists 2)Remove Duplicates from Sorted List Two-pointer technique + dummy node magic doing work 💪

Day 2/21 🔗 Linked Lists grind continues! Solved: 1️⃣ Subtract Two Numbers represented as Linked Lists 2️⃣ Add Two Numbers represented as Linked Lists Learning by doing. One day at a time 💻

Day 1/21 – Linked List Challenge 🚀 Solved 2 problems today: 1️⃣ Odd Even Linked List 2️⃣ Maximum Twin Sum of a Linked List Slow progress, strong foundations. 💪📚

Starting today, I’m dedicating 21 days to mastering the Linked List data structure. One concept, one implementation, every single day. Consistency over motivation — progress over perfection. By the end, Linked Lists won’t be a weakness anymore. 💪📚