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SCHOOL (1)
BASIC (42)
EASY (120)
MEDIUM (80)
HARD (9)
Reverse a linked list
Frequency in a Linked List
Pairwise swap elements of a linked list
Linked list of strings forms a palindrome
Compare two linked lists
Inorder Traversal
Reverse a Doubly Linked List
Selection Sort
K distance from root
Mirror Tree
Two Mirror Trees
Height of Binary Tree
Kth from End of Linked List
Middle of a Linked List
Check If Circular Linked List
Left View of Binary Tree
Transform to Sum Tree
Find Transition Point
Remove Duplicates from a Sorted Linked List
DFS of Graph
BFS of graph
Identical Trees
Square Root
Run Length Encoding
Leaves at Same Level or Not
Convert to Roman No
Match specific pattern
Multiply two linked lists
Count Occurrence of digit k
Delete in a Singly Linked List
Inorder Successor in BST
Sum of given range
Intersection of Two Linked Lists
Sum of leaf nodes in BST
Max and min element in Binary Tree
Reverse Using Stack
Full Binary Tree
Find the Sum of Last N nodes of the Linked List
Find n/k th node in Linked list
Queue Reversal
Reverse first K of a Queue
Remove Half Nodes
Sum of Leaf Nodes
Sum of Right Leaf Nodes
Sum of Left Leaf Nodes
Sum of Leaf Nodes at Min Level
Move all zeros to the front of the linked list
Rotate doubly Linked List
Controlled_Printing - Java
Start Coding - Java
The New Line - Java
Exists or Not? - Java
Count Odd Even - Java
The Pattern Matcher - Java
Need Some Change - Java
Count the Specials - Java
Matrix Interchange - Java
Consonants and Vowels check - Java
Predict the Column - Java
Sum of Big Integers
BigInteger Multiply
BigInteger mod
Java ArrayList Operation
Array Leaders
Floor in a Sorted Array
Roof Top
Transpose of Matrix
Check if a string is Isogram or not
Anagram
String Rotated by 2 Places
Reverse Words
Sum of numbers in string
Panagram Checking
Non Repeating Character
Parenthesis Checker
Union of Arrays with Duplicates
Find the closest number
Pairs which are Divisible by 4
Good Pairs
Sorted and Rotated Minimum
String Duplicates Removal
Min sum formed by digits
Move all negative elements to end
Chocolate Distribution Problem
Bitonic Point
Find Duplicate Element
Amend The Sentence
Closing bracket index
Convert a sentence into its equivalent mobile numeric keypad sequence
Remove b and ac from a given string
Rearrange a string
Ordering of strings
Remove Duplicates
Facing the sun
Distinct Substrings
Find the most frequent digit
Two sum -Pairs with 0 Sum
Sum of f(a[i], a[j]) over all pairs in an array of n integers
Segregate 0s and 1s
The Counting Game !!
Left out candies
Fitting The Array
Pair with given sum in a sorted array
Pattern Searching
Print Bracket Number
Minimum changes to make all substrings distinct
Odd Even Problem
Divisibility by 8
Sum Of Digits
Game of Nim
Element that appears once where every element occurs twice
Maximize Toys
Squares in N*N Chessboard
Triangular Number
Next Prime Palindrome
Collection of pens
Inorder Traversal and BST
Print Pattern
Sum of dependencies in a graph
Unique Binary Tree Requirements
Nearly Sorted Algorithm
Rotate a Linked List
Sort a linked list of 0s, 1s and 2s
Add 1 to a Linked List Number
Merge 2 sorted linked list in reverse order
Detect Loop in linked list
Count BST nodes that lie in a given range
Bottom View of Binary Tree
Delete without head pointer
Intersection in Y Shaped Lists
Diameter of a Binary Tree
Merge two sorted linked lists
Sum Tree
Diagonal Tree Traversal
Tree Boundary Traversal
Directed Graph Cycle
LCA in Binary Tree
Absolute List Sorting
Topological sort
Find the number of islands
Remove loop in Linked List
Dijkstra Algorithm
Multiply two strings
Minimum Swaps to Sort
Palindrome Linked List
Delete keys in a Linked list
Longest Palindrome in Linked List
Sort a stack
Duplicate Subtree
Top View of Binary Tree
Union of Two Linked Lists
Pair Sum in BST
Isomorphic Trees
Sum of nodes on the longest path
Convert Level Order Traversal to BST
Ceil in BST
Wave Array
Stock buy and sell
Kadane's Algorithm
Count Inversions
Merge Without Extra Space
Spirally traversing a matrix
Subarray with 0 sum
Stock span problem
Next Greater Element
K Sized Subarray Maximum
Minimum Jumps
Stickler Thief
Sum of all substrings of a number
Longest Increasing Subsequence
0 - 1 Knapsack Problem
Number of Unique Paths
Kth Smallest
Shortest Common Supersequence
Print Anagrams Together
Stock Buy and Sell – Multiple Transaction Allowed
Prerequisite Tasks
Sort 0s, 1s and 2s
Mr Modulo and Pairs
Water Collection
Sort in specific order
Rotate a Matrix
Reverse each word in a given string
k largest elements
Longest Common Substring
Longest substring with distinct characters
Look and Say Pattern
Rod Cutting
Minimize the Heights II
Minimum number of deletions
Sieve of Eratosthenes
Find the Safe Position
How Many X's?
Longest Repeating Subsequence
Segregate even and odd nodes in a Linked List
Help Classmates
Jump Game
Subset Sum Problem
Covid Spread
Floor in BST
Linked List Group Reverse
Binary Tree to DLL
Alien Dictionary
Trapping Rain Water
Burning Tree
Palindrome SubStrings
Minimum sum partition
Word Ladder II
Stock Buy and Sell – Max 2 Transactions Allowed
Find Length of Linked List
Count Leaves in Binary Tree
Postorder Traversal
Replace all 0's with 5
Replace all 0's with 5
Print number pattern
Preorder Traversal
First Occurence
Palindromic Array
Minimum element in BST
Modular Node
longest substring containing '1'
Count Non-Leaf Nodes in Tree
Alternates in an Array
Sum Array Puzzle
Remove common characters and concatenate
Anagram Palindrome
Sum of distinct elements
Sum of all sub-sequences of a number
Same frequency in two halves
Remove repeated digits in a given number
The Penalty Shootout
Last duplicate element in a sorted array
Rotate Array by One
Ishaan Loves Chocolates
Rotating an Array
Min and Max in Array
Perfect Square String
Remove character
GCD of Array
GCD of two numbers
House Robber
Factorial
Sum of Digit is Palindrome or not
Binary number to decimal number
Series AP
Check if the number is Fibonacci
Anshuman's Favourite Number
Print the Kth Digit
Doctors Clinic
Pattern Jumping
Minimum difference pair
Maximum and Minimum Of Array Elements
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