- Stack
- Queue
- Heap (Priority Queue)
- Linked List
- Iteration & Recursion
- Arrays
- Backtracking
- Hash Table
- Search
- Sorting Algorithms
- Strings
- Integers
- Numbers
- Tree Data Structures
- Tries Data Structures
- Graphs Data Structure
- Advanced Graphs Data Structure
- 1-D Dynamic Programming
- 2-D Dynamic Programming
- Greedy
- Intervals
| # | Title | Solution |
|---|---|---|
| 01 | The Stack data Structure | Solution |
| 02 | The Stack data Structure : Understanding Stack | Solution |
| 03 | Determine if parenthesis are balanced | Solution |
| 04 | Convert integer to binary | Solution |
| 05 | The Stack data Structure : Reverse String | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | The Queue Data Structure | Solution |
| 02 | The Queue Data Structure | Solution |
| 03 | Queue Data Structure : Producer Consumer Problem | Solution |
| 04 | Queue Data Structure : Producer Consumer Problem | Solution |
| 05 | Queue Data Structure : Print Binary Numbers From 1 to 10 Using Queue | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Find Median from Data Stream | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Singly Linked List | Solution |
| 02 | Singly Linked List -- Length of List | Solution |
| 03 | Singly Linked List -- Node Swap | Solution |
| 04 | Singly Linked List -- Reverse | Solution |
| 05 | Singly Linked List -- Merge Two Sorted Lists | Solution |
| 06 | Singly Linked List -- Remove Duplicates | Solution |
| 07 | Singly Linked List -- Nth-to-Last Node | Solution |
| 08 | Singly Linked List -- Count Occurrence | Solution |
| 09 | Singly Linked List -- Rotate | Solution |
| 10 | Singly Linked List -- Is Palindrome | Solution |
| 11 | Singly Linked List -- Move Tail to Head | Solution |
| 12 | Singly Linked List -- Sum Two Lists | Solution |
| 13 | Singly Linked Lists Leetcode -- Reverse | Solution |
| 14 | Singly Linked Lists Leetcode -- Merge Two Sorted Lists | Solution |
| 15 | Singly Linked List Leetcode -- Reorder List | Solution |
| 16 | Singly Linked List Leetcode -- Remove Nth Node From End of List | Solution |
| 17 | Singly Linked List Leetcode -- Linked List Cycle | Solution |
| 18 | Singly Linked List Leetcode -- Merge k Sorted Lists | Solution |
| 00 | Readme | Problem Statements with Explanations |
| 00 | Readme (Leetcode Problems) | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Doubly Linked List -- Append and Prepend | Solution |
| 02 | Doubly Linked List -- Add Node Before/After | Solution |
| 03 | Doubly Linked List -- Delete Node | Solution |
| 04 | Doubly Linked List -- Reverse | Solution |
| 05 | Doubly Linked List -- Remove Duplicates | Solution |
| 06 | Doubly Linked List -- Pairs with Sum | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Circular Linked List -- Append and Prepend | Solution |
| 02 | Circular Linked List -- Remove Node | Solution |
| 03 | Circular Linked List -- Split List | Solution |
| 04 | Circular Linked List -- Josephus Problem | Solution |
| 05 | Circular Linked List -- Is Circular Linked List | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Iterative Method | Solution |
| 02 | Recursive Method | Solution |
| 03 | Recursive Method: Fibonacci Number | Solution |
| 04 | Recursive Method: List Sum | Solution |
| 05 | Recursive Method: Sum Of Integer | Solution |
| 06 | Recursion: Sum Of Positive Integer | Solution |
| 06 | Recursion: Calculate The Harmonic Sum | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Arrays: Array Advance Game | Solution |
| 02 | Greedy Algorithms: Optimal Task Assignment | Solution |
| 03 | Sorting Algorithms: Intersection of Two Sorted Arrays | Solution |
| 04 | Arrays: Arbitrary Precision Increment | Solution |
| 05 | Arrays: Two Sum Problem | Solution |
| 06 | Arrays: Buy and Sell Stock | Solution |
| 07 | Subarray Sum Equals K | Solution |
| 08 | Contains Duplicate | Solution |
| 09 | Group Anagrams | Solution |
| 10 | Top K Frequent Elements - Bucket Sort | Solution |
| 11 | Product of Array Except Self | Solution |
| 12 | Longest Consecutive Sequence | Solution |
| 13 | 3Sum | Solution |
| 14 | Container With Most Water | Solution |
| 15 | Unique Number of Occurrences | Solution |
| 16 | Split the Array | Solution |
| 17 | Kth Largest Element in an Array | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Combination Sum | Solution |
| 02 | Word Search | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Hash Table Implementation | Solution |
| 02 | Hash Table Implementation : Get Hash | Solution |
| 03 | Hash Table Implementation : Collision Handling In Hash Table | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Linear Search | Solution |
| 02 | Linear Search : Find Elements | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Binary search | Solution |
| 02 | Binary Search: Find Closest Number | Solution |
| 03 | Binary Search: Find Fixed Point | Solution |
| 04 | Binary Search: Find Bitonic Peak | Solution |
| 05 | Binary Search: Find First Entry in List with Duplicates | Solution |
| 06 | Binary Search: Python's Bisect Method | Solution |
| 07 | Binary Search: Integer Square Root | Solution |
| 08 | Find Minimum in Rotated Sorted Array | Solution |
| 09 | Binary Search: Find Index Of All Occurrences | Solution |
| 10 | Binary Search: Search in Rotated Sorted Array | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Bubble Sort | Solution |
| 02 | Bubble Sort : Using Key | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Quick Sort: Hoare Partition | Solution |
| 02 | Quick Sort: Lomuto Partition | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Insertion Sort | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Merge Sort Two Sorted List | Solution |
| 02 | Merge Sort: One Unsorted List | Solution |
| 03 | Merge Sort: Using Key | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Shell Sort | Solution |
| 02 | Shell Sort: Remove Duplicates | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Selection Sort | Solution |
| 02 | Selection Sort: Dictionary | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Reverse String | Solution |
| 02 | Count Consonants in String | Solution |
| 03 | Look-and-Say Sequence | Solution |
| 04 | String Processing: Spreadsheet Encoding | Solution |
| 05 | String Processing: Is Palindrome | Solution |
| 06 | String Processing: Is Anagram | Solution |
| 07 | String Processing: Is Palindrome Permutation | Solution |
| 08 | String Processing: Check Permutation | Solution |
| 09 | String Processing: Is Unique | Solution |
| 10 | String Processing: Integer to String | Solution |
| 11 | String Processing: String to Integer | Solution |
| 12 | Longest Substring Without Repeating Characters | Solution |
| 13 | Encode and Decode Strings | Solution |
| 14 | Longest Repeating Character Replacement | Solution |
| 15 | Minimum Window Substring | Solution |
| 16 | First Letter to Appear Twice | Solution |
| 17 | First Unique Character in a String | Solution |
| 18 | Find the Index of the First Occurrence in a String | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Add Digits | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Product of Two Numbers | Solution |
| 02 | Convert Integer To Binary | Solution |
| 03 | Convert Binary To Integer | Solution |
| 04 | Roman to Integer | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | General Trees | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Binary Trees: Traversal Algorithms Pre-Order | Solution |
| 02 | Binary Trees: Traversal Algorithms In-Order | Solution |
| 03 | Binary Trees: Traversal Algorithms Post-Order | Solution |
| 04 | Binary Trees: Traversal Algorithms Level-Order | Solution |
| 05 | Binary Trees: Traversal Algorithms Reverse Level-Order | Solution |
| 06 | Binary Trees: Calculating Height of Tree | Solution |
| 07 | Binary Trees: Calculating Size of Tree | Solution |
| 08 | Binary Trees: Invert Binary Tree | Solution |
| 09 | Binary Trees: Maximum Depth of Binary Tree | Solution |
| 10 | Binary Trees: Subtree Of Another Tree | Solution |
| 11 | Binary Trees: Level Order Traversal | Solution |
| 12 | Binary Trees: Construct Binary Tree from Preorder and Inorder Traversal | Solution |
| 13 | Binary Trees: Construct Binary Tree from Inorder and Postorder Traversal | Solution |
| 14 | Binary Trees: Maximum Path Sum | Solution |
| 15 | Binary Trees: Serialize and Deserialize | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Binary Search Trees: Insertion | Solution |
| 02 | Binary Search Trees: Searching | Solution |
| 03 | Binary Search Trees: Checking the BST Property | Solution |
| 04 | Binary Search Trees: Using list | Solution |
| 05 | Binary Search Trees: Using list - In-Order-Traversal | Solution |
| 06 | Binary Search Trees: Using list - Post-Order-Traversal | Solution |
| 07 | Binary Search Trees: Using list - Pre-Order-Traversal | Solution |
| 08 | Binary Search Trees: Using list - Delete Node Method 1 | Solution |
| 09 | Binary Search Trees: Using list - Delete Node Method 2 | Solution |
| 10 | Binary Search Trees: Lowest Common Ancestor of a Binary Search Tree | Solution |
| 11 | Binary Search Trees: Validate | Solution |
| 12 | Binary Search Trees: Kth Smallest Element | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Implement Trie (Prefix Tree) | Solution |
| 02 | Design Add and Search Words Data Structure | Solution |
| 03 | Word Search II | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Graph Data Structure | Solution |
| 02 | Number of Islands | Solution |
| 03 | Clone Graph | Solution |
| 04 | Pacific Atlantic Water Flow | Solution |
| 05 | Course Schedule | Solution |
| 06 | Graph Valid Tree | Solution |
| 07 | Number of Connected Components in an Undirected Graph | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Alien Dictionary | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Climbing Stairs | Solution |
| 02 | House Robber | Solution |
| 03 | House Robber II | Solution |
| 04 | Longest Palindromic Substring | Solution |
| 05 | Palindromic Substrings | Solution |
| 06 | Decode Ways | Solution |
| 07 | Coin Change | Solution |
| 08 | Maximum Product Subarray | Solution |
| 09 | Word Break | Solution |
| 10 | Longest Increasing Subsequence | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Unique Paths | Solution |
| 02 | Longest Common Subsequence | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Maximum Subarray | Solution |
| 01 | Jump Game | Solution |
| 00 | Readme | Problem Statements with Explanations |
| # | Title | Solution |
|---|---|---|
| 01 | Insert Interval | Solution |
| 02 | Merge Interval | Solution |
| 00 | Readme | Problem Statements with Explanations |