Array
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Matrix
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String
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Recursion Basic Problems
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| Action | Problems [Article, Codes] | Question Link Leetcode | Question Link GFG | Solution Link | Notes |
|---|---|---|---|---|---|
| Print 1 to n without using loops |
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Solution |
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| Sum of natural numbers using recursion |
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Solution |
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| Remove Linked List Elements using recursion |
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Solution |
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| Power of Two |
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Solution |
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| Tail recursion to calculate sum of array elements. |
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Solution |
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| Program to print first n Fibonacci Numbers | Set 1 |
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Solution |
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| Coin Change | DP-7 |
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Solution |
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| Sort the Queue using Recursion |
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Solution |
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| Reorder List |
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Solution |
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| Different Ways to Add Parentheses |
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Solution |
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| Strobogrammatic Number |
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Solution |
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| K-th Symbol in Grammar | Solution |
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Sorting
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Searching Problems
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linked list Problems
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Stack Problems
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Queue Problems
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Tree Problems
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Graph Problems
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Dynamic programming
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backtracking Problems
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| Action | Problems [Article, Codes] | Question Link Leetcode | Question Link GFG | Solution Link | Notes |
|---|---|---|---|---|---|
| Rat in a maze Problem |
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Solution |
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| Printing all solutions in N-Queen Problem |
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Solution |
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| Word Break Problem using Backtracking |
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Solution |
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| Sudoku Solver |
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Solution |
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| Remove Invalid Parentheses |
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Solution |
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| m Coloring Problem |
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Solution |
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Solution |
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| Tug of War |
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Solution |
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| Combinational Sum |
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Solution |
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| Find shortest safe route in a path with landmines |
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Solution |
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| Find the K-th Permutation Sequence of first N natural numbers |
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Solution |
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| Longest Possible Route in a Matrix with Hurdles |
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Solution |
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Gready Problems
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Bits Problems
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| Action | Problems [Article, Codes] | Question Link Leetcode | Question Link GFG | Solution Link | Notes |
|---|---|---|---|---|---|
| Count set bits in an integer |
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Solution |
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| Gray Code |
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Solution |
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| Find the two non-repeating elements in an array of repeating elements |
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Solution |
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| Count number of bits to be flipped to convert A to B |
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Solution |
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| Power Set |
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Solution |
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| Copy set bits in a range |
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Solution |
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| Find position of the only set bit |
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Solution |
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| XOR Queries of a Subarray |
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Solution |
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Heap Problems
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| Action | Problems [Article, Codes] | Question Link Leetcode | Question Link GFG | Solution Link | Notes |
|---|---|---|---|---|---|
| Implement a Maxheap/MinHeap using arrays and recursion. |
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Solution |
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| Sort an Array using heap. (HeapSort) |
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Solution |
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| Maximum of all subarrays of size k. |
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Solution |
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| largest element in an array |
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Solution |
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| Kth smallest and largest element in an unsorted array |
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Solution |
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| Merge “K” sorted arrays. [ IMP ] |
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Solution |
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| Kth largest sum continuous subarrayst |
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Solution |
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| Merge “K” Sorted Linked Lists [V.IMP] |
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Solution |
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| Convert BST to Min Heap |
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Solution |
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| Convert min heap to max heap |
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Solution |
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