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apoorvasingh1
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BASIC (22)
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HARD (7)
- Sorting Elements of an Array by Frequency
- Rotate a Linked List
- Sort a linked list of 0s, 1s and 2s
- Detect Loop in linked list
- Binary Tree from Inorder and Postorder
- Delete without head pointer
- Intersection in Y Shaped Lists
- Tree Boundary Traversal
- Implement stack using array
- Delete a node from BST
- LCA in Binary Tree
- Lowest Common Ancestor in a BST
- Two Stacks in an Array
- The Celebrity Problem
- Get Min from Stack
- Is Binary Tree Heap
- Largest BST
- Interleaved Strings
- Sorted subsequence of size 3
- Palindrome Linked List
- Print matrix in diagonal pattern
- Closest in BST
- Sort a stack
- k-th Smallest in BST
- Find Common Nodes in two BSTs
- Merge Sort for Linked List
- Construct Tree from Inorder & Preorder
- Construct tree from Inorder and LevelOrder
- Vertical sum
- Predecessor and Successor
- Wave Array
- Majority Element
- Spirally traversing a matrix
- Search in a sorted Matrix
- Postfix Evaluation
- Stock span problem
- Next Greater Element
- Minimum Cost of ropes
- Minimum Platforms
- Rotate by 90 degree
- Hard Arrangement
- Sort 0s, 1s and 2s
- Check if frequencies can be equal
- Largest prime factor
- Angle between hour and minute hand
- Sieve of Eratosthenes
- nCr
- Find nth root of m
- Stream First Non-repeating
- Out the Kth
- Reverse a linked list
- Pairwise swap elements of a linked list
- Node at a given index in linked list
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- Height of Binary Tree
- Kth from End of Linked List
- Middle of a Linked List
- Check If Circular Linked List
- Delete Middle of Linked List
- Stack using Linked List
- Insert a node in a BST
- Identical Trees
- Square Root
- BST Keys in a Range
- Binary Tree to BST
- Unique rows in boolean matrix
- Kth largest element in BST
- Minimum distance in an Array
- Special Stack
- Inorder Successor in BST
- Operating an array
- Insert in a Sorted List
- Sum of leaf nodes in BST
- Reverse Using Stack
- Remove Half Nodes
- Height of Spiral Tree
- Sum of Leaf Nodes
- Sum of Right Leaf Nodes
- Sum of Left Leaf Nodes
- Nodes at Odd Levels
- Get min at pop
- Equilibrium Point
- Array Leaders
- Matrix Boundary Traversal
- Parenthesis Checker
- Product array puzzle
- Password Decryption
- Pizza Love
- Trapping Rain Water
- Left View of Binary Tree
- Missing And Repeating
- Sorted and Rotated Minimum
- Second Largest
- Number of occurrence
- At Least K Occurrences
- Palindrome String
- Armstrong Numbers
- Prime Number
- Number Of Open Doors
- Perfect Numbers
- Pair cube count
- Sum of all prime numbers between 1 and n
- Series GP
- Rotate Array
- Find Length of Linked List
- Add two fractions
- Circular Linked List Traversal
- Searching in an Array
- Uncommon characters
- Upper Case Conversion
- URLify a given string
- Remove Duplicates from unsorted array
- Min and Max in Array
- Extract Maximum
- GCD of Array
- Find position of set bit
- Nth Even Fibonacci Number
- LCM And GCD
- Factorial
- Series AP
- Count Squares
- Print the Kth Digit
- Half N by M
- Pairs of prime number
- Squares in a Matrix