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BASIC (32)
EASY (116)
MEDIUM (168)
HARD (30)
Print Linked List
Find Length of Linked List
Queue Using Array
Preorder Traversal
Palindromic Array
Linked List Insertion At End
Start Coding
Array Search
Sorted Array Search
Reverse a String
First n Fibonacci
C++ Hello World
Sum of Array
Searching in an Array
Print Elements of Array
Value equal to index value
Remove vowels from string
Lower case to upper case
Floating point number even or odd
Largest Element in Array
Rotate Array by One
Array Subset
Min and Max in Array
Convert String to LowerCase
Reverse a String
Java Strings | Set 1
Java Hello World
Leap Year
Binary number to decimal number
Time Travel
Who has the majority?
Disk Placement
Reverse alternate nodes in Link List
Add Number Linked Lists
Add 1 to a Linked List Number
Detect Loop in linked list
Check for BST
Quick Sort
Heap Sort
Implement stack using array
Absolute List Sorting
Lowest Common Ancestor in a BST
Multiply two strings
Implement Atoi
Palindrome Linked List
Closest in BST
Merge two BST 's
Find triplets with zero sum
Duplicate Subtree
Find Common Nodes in two BSTs
Union of Two Linked Lists
Leftmost and rightmost nodes of binary tree
Isomorphic Trees
Deletion in Circular Linked List
Median of BST
Normal BST to Balanced BST
Kth Ancestor in a Tree
Mother Vertex
Reverse array in groups
Smallest Positive Missing
Wave Array
Rearrange an array with O(1) extra space
Maximum Index
Rotate Array
Kadane's Algorithm
Majority Element
Count Inversions
Indexes of Subarray Sum
Merge Without Extra Space
Make Matrix Beautiful
Boolean Matrix
Rotate by 90 degree
Subarray with 0 sum
Strings Rotations of Each Other
Case-specific Sorting of Strings
Stickler Thief
Optimal Strategy For A Game
Longest Increasing Subsequence
Longest Common Subsequence
Lucky Numbers
Zero Sum Subarrays
Kth Smallest
Nth Catalan Number
Container With Most Water
Stock Buy and Sell – Multiple Transaction Allowed
Sort 0s, 1s and 2s
Complement
Maximum Index
Flip Bits
Add Binary Strings
Maximum Product Subarray
Column name from a given column number
Substrings with K Distinct
Cutting Binary String
k largest elements
Longest Substring with K Uniques
Longest Palindrome in a String
Arranging the array
Rod Cutting
Longest Palindromic Subsequence
Build the smallest
Minimize the Heights II
A difference of values and indexes
Subarrays Product Less than K
Unique Number II
Coin Change (Count Ways)
Perfect Sum Problem
nCr
Partition Equal Subset Sum
Array Pair Sum Divisibility Problem
Matchsticks game
Akku and Binary Numbers
Find nth root of m
A Game of LCM
Count even length
Next Permutation
Missing number in matrix
Longest Repeating Subsequence
Total Decoding Messages
Stream First Non-repeating
2D Hopscotch
Replace O's with X's
Find the string in grid
Shortest Source to Destination Path
Prefix match with other strings
Single valued subtree
Minimize the Heights I
Remove and Reverse
Reverse a Stack
Largest subtree sum in a tree
Expression contains redundant bracket or not
Wine Buying and Selling
Minimum Multiplications to reach End
Number Of Enclaves
Alex Travelling
Shortest path in Directed Acyclic Graph
Majority Element - More Than n/3
Asteroid Collision
Task Scheduler
Maximum Sum Combination
Floor in BST
GCD Array
Minimize number of Students to be removed
Maximum Value
Shortest Prime Path
Flattening a Linked List
Absolute difference divisible by K
Make array elements unique
Next Greater Element in Circular Array
Find the first node of loop in linked list
Carpet into Box
Minimum X (xor) A
Find minimum number of Laptops required
Geeks And The String
Find the longest string
Maximum Profit By Choosing A Subset Of Intervals
Minimum repeat to make substring
Paint N Houses
Max Sum without Adjacents
Intersection Point in Y Shaped Linked Lists
BST Downward Traversal
Length of the longest subarray with positive product
Count number of free cell
Maximum Bipartite Matching
Minimum Days
Prime List
Walls Coloring
Apple Sequences
Connect Nodes at Same Level
Unique Paths in a Grid
Valid Compressed String
Fill the Matrix
Number of Good Components
Optimal Array
Best Node
Update Queries
Good Stones
Maximum Intersecting Lines
String rp or pr
Shy Geek
Count Special Numbers
Minimum Steps Required
Count Cyclic Paths
Second smallest number
Distinct Difference
Remove the balls
Unequal Arrays
Job Sequencing Problem
BST Maximum Difference
Find Number
Powerful Integer
Subtree In N-ary Tree
Add Minimum Characters
Maximum subset sum
Count Total Setbits
Find Kth permutation
Fraction pairs with sum 1
Last Fairy Standing
Get Count
Find H-Index
Reverse a linked list
Pairwise swap elements of a linked list
Node at a given index in linked list
Delete nodes having greater value on right
Inorder Traversal
Bubble Sort
Selection Sort
Insertion Sort
Height of Binary Tree
Balanced Tree Check
Middle of a Linked List
Left View of Binary Tree
Remove Duplicates from a Sorted Linked List
Postorder Traversal
Level Order in spiral form
Stack using Linked List
Insert a node in a BST
BFS of graph
Binary Search
Binary Tree to BST
Unique rows in boolean matrix
Multiply two linked lists
Delete in a Singly Linked List
Kth largest element in BST
Array Duplicates
Inorder Successor in BST
Insert in a Sorted List
Leaf under budget
Queue Reversal
Delete Mid of a Stack
Start Coding - Java
The New Line - Java
Taking input - Java
Learn to Comment - Java
nextLine and next
Bitwise Operators - Java
Swap the array elements
Reverse an Array
Frequency in Queue
Frequency Game
First Set Bit
Power of 2
Equilibrium Point
Array Leaders
Print adjacency list
Transpose of Matrix
Matrix Boundary Traversal
Anagram
Reverse Words
Non Repeating Character
Parenthesis Checker
Count number of hops
Check Equal Arrays
Missing in Array
Roman Number to Integer
Max Value Permutation
Missing And Repeating
Find Index
Move All Zeroes to End
String Duplicates Removal
Chocolate Distribution Problem
Bitonic Point
Reorganize The Array
Second Largest
Rotate Bits
Number of occurrence
Convert an array to reduced form
Check if array is sorted
Find the closest pair from two arrays
Palindrome String
Total count
Balanced string
Is Binary Number Multiple of 3
Number of 1 Bits
Armstrong Numbers
Nth Fibonacci Number
Copy Set Bits in Range
Prime Number
Break a number
Perfect Numbers
Largest number possible
Least Prime Factor
Sum of First N Natural Numbers
Arithmetic Number
Surround the 1's
Count the Substrings
Stock Buy and Sell – Max one Transaction Allowed
Maximum Depth Of Binary Tree
Minimize the sum
Last modified ball
Transform to Sum Tree
Parent of Max GCD Siblings in a Binary Tree
Maximum Weight Node
Type it!
Min operations
Last cell in a Matrix
Balloon Everywhere
Reverse both parts
Cutting Rectangles
Equal Left and Right Subarray Sum
Make the array beautiful
Remainder on dividing by 11
Is it Fibonacci
Number of Subarrays of 0's
Maximum Identical Bowls
Bus Conductor
Minimum Integer
Make Palindrome
Bit Magic
Dominant Pairs
Total Traversal Time
Strong Students in School
Ticket Counter
Find Bots on Geeklandster
Two Smallests in Every Subarray
Distribute Balls
Linked List Group Reverse
AVL Tree Deletion
Nodes at given distance in binary tree
String Permutations
Max Circular Subarray Sum
Solve the Sudoku
Next Smallest Palindrome
Number of distinct subsequences
Longest repeating and non-overlapping substring
Next Happy Number
Search Pattern (Rabin-Karp Algorithm)
Split Array Largest Sum
Scrambled String
Maximum Number of Toys
Articulation Point - I
Min Chars to Add for Palindrome
Expression Add Operators
MaxSkill
Count Lucky Permutations
Select Nodes
Largest Sum Cycle
Shortest Path Using Atmost One Curved Edge
Avoid Explosion
Walls Coloring II
Redundant Parenthesis
Partition the Array
Maximum Number of coins
Special Digits
Cake Distribution Problem
Min Time
Search in a 2D Matrix
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