Adiya Takhellambam

Software Engineer | Building, Learning, and Improving

[Adiya Takhellambam @Adiyatakhell]

Day 26 #SDESheetChallenge
Solved:
Next Smaller Element
LRU Cache
LFU Cache
Focused on monotonic stacks and cache design. Implemented LRU & LFU caches with O(1) average get() and put() operations using HashMaps, linked lists, and frequency tracking.
#DSA #Java #Algorithms

[Adiya Takhellambam @Adiyatakhell]

Day 25 #SDESheetChallenge

Solved:

Balanced Parenthesis
Next Greater Element
Sort a Stack (Recursion)

Key takeaway: Learned how stacks power expression validation, monotonic stack patterns, and recursion-based problem solving.

#DSA #Java #Algorithms #CodingInterview

[Adiya Takhellambam @Adiyatakhell]

Day 24 #SDESheetChallenge
Solved 4 implementation-based problems:
• Stack using Arrays
• Queue using Arrays
• Stack using Queue
• Queue using Stack
Focused on mastering LIFO, FIFO, and data structure design fundamentals.
#DSA #Java #Algorithms #CodingInterview

[Adiya Takhellambam @Adiyatakhell]

Day 23 #SDESheetChallenge

Solved:
• Find Median from Data Stream
• Merge K Sorted Arrays
• Top K Frequent Elements
Key takeaway: Heaps are extremely effective for dynamic datasets, ranking problems, and processing top-k queries efficiently without full sorting.
#DSA #Java

[Adiya Takhellambam @Adiyatakhell]

Day 22 #SDESheetChallenge
Solved:
• Implement Max Heap
• K-th Largest Element in an Array
• Maximum Sum Combination
Key takeaway: The right data structure can dramatically improve both efficiency and simplicity. Today's focus was on Heaps and Priority Queues.
#DSA #Java

[Adiya Takhellambam @Adiyatakhell]

Day 21 #SDESheetChallenge

Solved:
• Median of Two Sorted Arrays
• Aggressive Cows
• Book Allocation
• Kth Element of Two Sorted Arrays
Today's focus: Binary Search on Answer.
Building stronger pattern recognition with every problem.
#DSA #Java #Algorithms

[Adiya Takhellambam @Adiyatakhell]

Day 20 #SDESheetChallenge
Solved:
• Find Nth Root of a Number
• Single Element in Sorted Array
• Search in Rotated Sorted Array
• Matrix Median
Learned:
• Binary Search on Answers
• Search Space Reduction
• Sorted Properties
Matrix Median was today's highlight.
#DSA

[Adiya Takhellambam @Adiyatakhell]

@Jitesh_117 "Future Programming language is English" 🤣🤣🤣

[Adiya Takhellambam @Adiyatakhell]

Day 19 #SDESheetChallenge

Solved:
• M Coloring Problem
• Rat in a Maze
• Word Break
Learned:
• Backtracking
• Graph Coloring
• Dynamic Programming
Word Break was today's highlight.
#DSA #DP #Backtracking #Java

[Adiya Takhellambam @Adiyatakhell]

@systemdesignone Playbook

[Adiya Takhellambam @Adiyatakhell]

Day 18 #SDESheetChallenge

Solved:
• Permutations of a String
• N-Queens
• Sudoku Solver
Learned:
• Backtracking
• Constraint Propagation
• State Space Search
Sudoku Solver was today's highlight.
#DSA #Backtracking #Java

[Adiya Takhellambam @Adiyatakhell]

Day 17 #SDESheetChallenge
Solved:
• Combination Sum
• Combination Sum II
• Palindrome Partitioning
• Permutation Sequence
Learned:
• Backtracking
• Recursion Trees
• Duplicate Handling
Palindrome Partitioning was today's highlight.
#DSA #Backtracking #Java

[Adiya Takhellambam @Adiyatakhell]

Day 16 #SDESheetChallenge

Solved:
• Assign Cookies
• Subset Sum Equals Target
• Subsets II
• Minimum Coins
Subsets II was the standout problem today—handling duplicates efficiently in backtracking was the key insight.
#DSA #DP #Backtracking #Java

[Adiya Takhellambam @Adiyatakhell]

Day 15 #SDESheetChallenge

Solved:
• N Meetings in One Room
• Minimum Platforms Required
• Job Sequencing Problem
• Fractional Knapsack

Learned:
• Greedy Choice Strategy
• Interval Scheduling
• Profit Maximization
• Value/Weight Optimization
#DSA #GreedyAlgorithms #Java

[Adiya Takhellambam @Adiyatakhell]

Day 14 #SDESheetChallenge

Solved:
• Remove Duplicates from Sorted Array
• Maximum Consecutive Ones
• Trapping Rain Water
Learned:
Two Pointer Technique
Array Traversal Patterns

Optimal Water Trapping using Two Pointers

Trapping Rain Water was the highlight today.
#DSA

[Adiya Takhellambam @Adiyatakhell]

Day 13 #SDESheetChallenge

Solved:
• Clone LL with Random Pointer
• 3Sum
• Rotate a Linked List

Learned:

- Deep Copy without extra space
- Sorting + Two Pointers
- Circular Linked List Manipulation

3 more problems done.

Thanks @striver_79 @takeUforward

#DSA #Java

[Adiya Takhellambam @Adiyatakhell]

Day 12 #SDESheetChallenge

Solved:
• Palindrome Linked List
• Starting Point of Loop in LL
• Flattening of Linked List

Learned:
Fast & Slow Pointers
Floyd's Cycle Detection
Recursive Merge Technique

Thanks @striver_79 @takeUforward
#DSA #Java

[Adiya Takhellambam @Adiyatakhell]

Day 11 #SDESheetChallenge
Detect Cycle in LL Intersection of LLs
Reverse Nodes in K Groups
Learned:
Floyd's Algorithm,
Two Pointers,
K-Group Reversal.
3 more problems done.
Thanks @striver_79 @takeUforward

#DSA #Java

[Adiya Takhellambam @Adiyatakhell]

Day 10 of #SDESheetChallenge
Solved:
Add two numbers in Linked List,
Remove Nth node from the back,
Delete Node in a Linked List O(1)
Learned:
Linked List Arithmetic,
Two Pointers,
In-place Deletion
3 problems done. Consistency > Motivation.
Thanks @striver_79 @takeUforward

[Adiya Takhellambam @Adiyatakhell]

Day 9 of #SDESheetChallenge
Solved:
Reverse a LL,
Middle of Linked List,
Merge two Sorted Lists
Learned:
Linked List Reversal,
Fast-Slow Pointer,
Two Pointer Merge
3 problems done. Consistency > Motivation.
Thanks @striver_79 @takeUforward