- ARRAYS
- LINKED LISTS
- RECURSION
- SORTING
- BINARY SEARCH
- TREES
- BACKTRACKING
- HEAP PRIORITY QUEUE
- HASHING
- GRAPHS
- DYNAMIC PROGRAMMING
- BIG MANIPULATION
Difficulty | Problem | Solution |
---|---|---|
Remove Duplicates from Sorted Array | Python | PHP | |
Remove Element | Python | PHP | |
Shuffle the Array | Python | PHP | |
Concatenation of Array | Python | PHP | |
Baseball Game | Python | PHP | |
Valid Parentheses | Python | PHP | |
Min Stack | Python | PHP |
Difficulty | Problem | Solution |
---|---|---|
Reverse Linked List | Python | PHP | |
Merge Two Sorted Lists | Python | PHP | |
Design Linked List | Python | PHP | |
Design Browser History | Python | PHP | |
Number of Students Unable to Eat Lunch | Python | PHP | |
Implement Stack using Queues | Python | PHP |
Difficulty | Problem | Solution |
---|---|---|
Reverse Linked List | Python | PHP | |
Fibonacci Number | Python | PHP | |
Climbing Stairs | Python | PHP |
Difficulty | Problem | Solution |
---|---|---|
Sort an Array | Python | PHP | |
Merge k Sorted Lists | Python | PHP | |
Kth Larges Element in an Array | Python | PHP | |
Sort Colors | Python | PHP |
Difficulty | Problem | Solution |
---|---|---|
Binary Search | Python | PHP | |
Search a 2D Matrix | Python | PHP |
Difficulty | Problem | Solution |
---|---|---|
Search in a Binary Search Tree | Python | PHP | |
Lowest Common Ancestor of a Binary Search Tree | Python | PHP | |
Insert into a Binary Search Tree | Python | PHP | |
Delete Node in a BST | Python | PHP | |
Binary Tree Inorder Traversal | Python | PHP | |
Kth Smallest Element in a BST | Python | PHP | |
Construct Binary Tree from Preorder and Inorder traversal | Python | PHP | |
Binary Tree Level Order Traversal | Python | PHP | |
Binary Tree Right Side View | Python | PHP |
Difficulty | Problem | Solution |
---|---|---|
Path Sum | Python | PHP | |
Subsets | Python | PHP | |
Combination Sum | Code |
Difficulty | Problem | Solution |
---|---|---|
Kth Largest Element in a Stream | Code | |
Last Stone Weight | Code | |
K Closest Point to Origin | Code |
Difficulty | Problem | Solution |
---|---|---|
Contains Duplicate | Code | |
Two Sum | Code | |
LRU Cache | Code | |
Design HashSet | Code | |
Design HashMap | Code |
Difficulty | Problem | Solution |
---|---|---|
Number of Islands | Code | |
Max Area of Island | Code | |
Shortest Path in Binary Matrix | Code | |
Rotting Oranges | Code | |
Clone Graph | Code | |
Courses Schedule | Code |
Difficulty | Problem | Solution |
---|---|---|
House Robber | Code | |
Unique Paths | Code | |
Unique Paths II | Code | |
Longest Common Subsequence | Code |
Difficulty | Problem | Solution |
---|---|---|
Number of 1 Bits | Code | |
Counting Bits | Code | |
Reverse Bits | Code |