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BASIC (43)
EASY (85)
MEDIUM (54)
HARD (7)
- Rotate Array
- Count Linked List Nodes
- Power of Four
- Check for Binary String
- Count Leaves in Binary Tree
- Postorder Traversal
- Implement stack using array
- Queue using Linked List
- Queue Using Array
- Doubly linked list Insertion at given position
- Add two fractions
- Replace all 0's with 5
- Count zeros in a sorted matrix
- Print number pattern
- Largest product
- Preorder Traversal
- First Occurence
- Search a node in BST
- Remainder with 7
- HashMap Operations
- TreeMap Operations
- Java Collection | Set 5 (LinkedHash Set)
- Linked List Insertion At End
- Reverse array in groups
- Sorted Array Search
- Binary String
- Most Frequent Character
- Elements before which no element is bigger
- Sum of distinct elements
- Shortest direction
- String Reversal
- Remove Spaces
- Good String
- Exceptionally odd
- Find Substring from last of the Given String
- Pattern of Strings
- GCD of Array
- Check for Power
- LCM And GCD
- Number of divisors
- Parity of unsigned integer
- Sum of Digits Divisibility
- Interesting Patterns
- Reverse a linked list
- Compare two linked lists
- Remove duplicates from an unsorted linked list
- Split a Linked List into two halves
- Delete in a Doubly Linked List
- Inorder Traversal
- Reverse a Doubly Linked List
- Bubble Sort
- Selection Sort
- Insertion Sort
- Check for BST
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- Delete without head pointer
- Height of Binary Tree
- Balanced Tree Check
- Kth from End of Linked List
- Middle of a Linked List
- Check If Circular Linked List
- Left View of Binary Tree
- Delete Middle of Linked List
- Intersection Sorted Linked Lists
- Find Transition Point
- Queue using two Stacks
- Remove Duplicates from a Sorted Linked List
- Stack using two queues
- Level Order in spiral form
- Reverse Level Order Traversal
- Stack using Linked List
- Insert a node in a BST
- Identical Trees
- Root to leaf path sum
- Square Root
- Nodes without a Sibling
- Postorder from Inorder and Preorder
- Lowest Common Ancestor in a BST
- Binary Search
- Run Length Encoding
- Largest subarray of 0's and 1's
- Remove Duplicates Sorted Array
- Level Order Line by Line
- BST Keys in a Range
- Print all possible strings
- Minimum Depth of a Binary Tree
- Remove duplicates in array
- Odd even level difference
- Almost Prime Numbers
- Binary Tree to BST
- K-Palindrome
- Toeplitz matrix
- Remove every k'th node
- Leaves at Same Level or Not
- Third largest element
- Convert to Roman No
- Find Maximum value
- Java Collection | Set 1 (ArrayList) Part-2
- Java Collection | Set 2 (Set)
- You and your books
- Max distance between same elements
- Longest Consecutive Subsequence
- Generate Grey Code Sequences
- Delete in a Singly Linked List
- Array Duplicates
- Multiply two polynomials II
- Frequencies in a Limited Array
- Anagram
- Reverse Words
- Parenthesis Checker
- Missing in Array
- Adding One
- Find Kth Rotation
- String Duplicates Removal
- String Manipulation
- 1[0]1 Pattern Count
- Remove Duplicates
- Distinct Substrings
- Average of Prefix
- Special array reversal
- Tom and String
- Overlapping Substrings
- Is Binary Number Multiple of 3
- Palindrome
- Inorder Traversal and BST
- Overlapping rectangles
- Sorting Elements of an Array by Frequency
- Add Number Linked Lists
- Merge 2 sorted linked list in reverse order
- Count BST nodes that lie in a given range
- Merge Sort
- Quick Sort
- Binary Tree from Inorder and Postorder
- Bottom View of Binary Tree
- Intersection in Y Shaped Lists
- Diameter of a Binary Tree
- Heap Sort
- Merge two sorted linked lists
- Add all greater values to every node in a BST
- Sum Tree
- Connect Nodes of Levels
- Flattening a Linked List
- Tree Boundary Traversal
- Reverse alternate levels of a perfect binary tree
- Delete a node from BST
- LCA in Binary Tree
- Maximum difference between node and its ancestor
- Absolute List Sorting
- Two Stacks in an Array
- Max sum path in two arrays
- The Celebrity Problem
- Largest subarray with 0 sum
- Vertical Tree Traversal
- Find kth element of spiral matrix
- Max sum in the configuration
- Get Min from Stack
- Gas Station
- Is Binary Tree Heap
- Sum of subset differences
- Count Palindromic Subsequences
- Implement Atoi
- Maximum Difference
- Palindrome Linked List
- Print matrix in diagonal pattern
- Number of root to leaf paths
- Delete keys in a Linked list
- Count distinct elements in every window
- Kadane's Algorithm
- Majority Element
- Indexes of Subarray Sum
- Triplet Sum in Array
- Next Greater Element
- Longest Increasing Subsequence
- Sort 0s, 1s and 2s
- Count Number
- Maximum Product Subarray
- Reverse each word in a given string
- k largest elements
- Product Pair
- 3 Divisors
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