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BASIC (3)
EASY (123)
MEDIUM (195)
HARD (46)
Pairwise swap elements of a linked list
Delete nodes having greater value on right
Remove duplicates from an unsorted linked list
Reverse a Doubly Linked List
Right View of Binary Tree
K distance from root
Height of Binary Tree
Balanced Tree Check
Decimal Equivalent of Binary Linked List
Find Transition Point
Remove Duplicates from a Sorted Linked List
Level Order in spiral form
DFS of Graph
Insert a node in a BST
BFS of graph
Identical Trees
Nodes without a Sibling
Lowest Common Ancestor in a BST
Binary Tree to BST
Leaves at Same Level or Not
Delete in a Singly Linked List
Kth largest element in BST
Minimum distance in an Array
Array Duplicates
Three way partitioning
Level order traversal
Inorder Successor in BST
Insert in a Sorted List
Sum of leaf nodes in BST
More than n/k Occurrences
Count Pairs whose sum is equal to X
Median of BST
Leaf under budget
Reverse first K of a Queue
Closest Neighbour in BST
Brothers From Different Roots
Delete Mid of a Stack
Start Coding - Java
Swap the array elements
Predict the Column
First Set Bit
Rightmost different bit
Check K-th Bit
Power of 2
Frequencies in a Limited Array
Equilibrium Point
Array Leaders
Print adjacency list
Sum of upper and lower triangles
Print Matrix in snake Pattern
Transpose of Matrix
Matrix Boundary Traversal
Winner of an election
Strings Rotations of Each Other
Isomorphic Strings
Panagram Checking
Non Repeating Character
Reach a given score
Count ways to N'th Stair
Count number of hops
Roman Number to Integer
Count the elements
Move All Zeroes to End
String Duplicates Removal
Chocolate Distribution Problem
Count pairs Sum in matrices
Rotate Bits
Number of occurrence
K-Pangrams
Does array represent Heap
Convert an array to reduced form
Play With OR
At Least K Occurrences
Find the closest pair from two arrays
Palindrome String
Is Binary Number Multiple of 3
Minimum Operations
Divisibility by 8
Number of 1 Bits
Max Sum Subarray of size K
Nth Fibonacci Number
Copy Set Bits in Range
Party of Couples
Shortest path from 1 to n
Break a number
Perfect Numbers
Largest number possible
Recamans sequence
Form a number divisible by 3 using array digits
Juggler Sequence
Arithmetic Number
Row with Minimum 1s
Surround the 1's
Inorder Traversal and BST
Letters Collection
Print Pattern
Count the Substrings
Smallest window containing 0, 1 and 2
Insert an Element at the Bottom of a Stack
Fibonacci series up to Nth term
Minimize the sum
Last modified ball
Transform to Sum Tree
Parent of Max GCD Siblings in a Binary Tree
Find the first node of loop in linked list
Maximum Weight Node
Type it!
Min operations
Virus Infection
Binary Good
Last cell in a Matrix
Reverse both parts
Cutting Rectangles
Frogs and Jumps
Is it Fibonacci
Taxi Booking
Max Level Sum in Binary Tree
Binary matrix having maximum number of 1s
Number of Subarrays of 0's
Minimum Integer
Seating Arrangement
Complete the Staircase
String Matching
Reverse alternate nodes in Link List
Sort a linked list of 0s, 1s and 2s
Merge 2 sorted linked list in reverse order
Insert in Sorted Circular Linked List
Delete without head pointer
Heap Sort
Two Stacks in an Array
Serialize and deserialize a binary tree
Additive sequence
Multiply two strings
Implement Atoi
Print matrix in diagonal pattern
BST with Dead End
Duplicate Subtree
k-th Smallest in BST
Peak element
Euler Circuit in an Undirected Graph
Euler circuit and Path
Binary Tree to CDLL
Linked List that is Sorted Alternatingly
Leftmost and rightmost nodes of binary tree
Arrange Consonants and Vowels
Count the nodes at distance K from leaf
Children Sum in a Binary Tree
Diagonal sum in binary tree
Sum of nodes on the longest path
Kth Ancestor in a Tree
ZigZag Tree Traversal
Mother Vertex
Gray to Binary Conversion
Maximum occured integer
Wave Array
Maximum Index
Two Repeated Elements
Union of 2 Sorted Arrays
Indexes of Subarray Sum
Merge Without Extra Space
Level of Nodes
Make Matrix Beautiful
Boolean Matrix
Determinant of a Matrix
Distance of nearest cell having 1
Subarray with 0 sum
Case-specific Sorting of Strings
Fractional Knapsack
Detect Cycle using DSU
Stickler Thief
Sum of all substrings of a number
Longest Increasing Subsequence
Longest Common Subsequence
Lucky Numbers
Implement Trie
Nth Catalan Number
Top K Frequent in Array
Word Break
Stock Buy and Sell – Multiple Transaction Allowed
4 Sum - All Quadruples
Paths to reach origin
Complement
Maximum Index
Number of subarrays with maximum values in given range
Flip Bits
Top k numbers in a stream
Pythagorean Triplet
Painting the Fence
Sum of bit differences
Form the Largest Number
Longest subarray with sum divisible by K
Check if a string is repetition of its substring of k-length
Check if frequencies can be equal
Column name from a given column number
Substrings with K Distinct
Shuffle integers
Find the N-th character
Sum of XOR of all pairs
Longest Substring with K Uniques
Longest Palindromic Subsequence
Largest Sum Subarray of Size at least K
Minimize the Heights II
Transform to prime
First and Last Occurrences
Minimum Deletions
Print N-bit binary numbers having more 1s than 0s
Number following a pattern
Subarrays Product Less than K
Unique Number II
Bleak Numbers
Largest prime factor
Modified Game of Nim
Maximize dot product
Max Sum Increasing Subsequence
Coin Change (Count Ways)
Sequence of Sequence
Gold Mine Problem
Perfect Sum Problem
Power Set
Knapsack with Duplicate Items
Partition Equal Subset Sum
Count possible ways to construct buildings
Count digit groupings of a number
Array Pair Sum Divisibility Problem
Number of paths
Game with String
Smith Number
Maximum sum of hour glass
How Many X's?
Exit Point in a Matrix
Longest Repeating Subsequence
Total Decoding Messages
2D Hopscotch
Replace O's with X's
Rohan's Love for Matrix
Traverse All Edges And Vertices
Find the string in grid
Techfest and the Queue
Largest subsquare surrounded by X
Shortest Source to Destination Path
Search Pattern (Rabin-Karp Algorithm)
Remove K Digits
Find duplicate rows in a binary matrix
Paths from root with a specified sum
Sort for Singly Linked List
Anti Diagonal Traversal of Matrix
Unique Number III
All Unique Permutations of an array
Course Schedule
Clone an Undirected Graph
Remove and Reverse
Even Swap
Reverse a Stack
Buy Maximum Stocks
Find shortest safe route in a matrix
Graph is Tree or Not
Minimum Multiplications to reach End
Number Of Enclaves
Eventual Safe States
City With the Smallest Number of Neighbors at a Threshold Distance
Alex Travelling
Shortest path in Directed Acyclic Graph
Minimum Absolute Difference In BST
Maximum Sum Combination
GCD Array
Shortest Prime Path
Absolute difference divisible by K
Make array elements unique
Next Greater Element in Circular Array
Carpet into Box
Minimum X (xor) A
Geeks And The String
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
Walls Coloring
Water the plants
Geeks Island
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
String rp or pr
Knight in Geekland
Minimum Steps Required
Count Cyclic Paths
Maximum Triplet product
Second smallest number
Special Palindrome Substrings
Maximum Possible Value
Distinct Difference
Anagrams in Linked List
Yet another query problem
Geek hates too many 1s
Prefix Suffix String
Smaller Sum
Shortest XY distance in Grid
BST Maximum Difference
Nearest smaller tower
Geek's Village and Wells
Easy Task
Fraction pairs with sum 1
New Year Resolution
Grinding Geek
Flatten BST to sorted list
Minimize the Difference
Pairs violating the BST property
Kth common ancestor in BST
Linked List Group Reverse
Reorder List
Subtraction in Linked List
AVL Tree Deletion
Merge Sort on Doubly Linked List
Nodes at given distance in binary tree
String Permutations
Solve the Sudoku
Next Smallest Palindrome
Count Pairs in an Array
Search Pattern (KMP-Algorithm)
Number of distinct subsequences
Wildcard string matching
Longest repeating and non-overlapping substring
Sum-string
Minimum Points To Reach Destination
Strictly Increasing Array
Generalised Fibonacci numbers
Boolean Parenthesization
Possible Paths in a Tree
Find all Critical Connections in the Graph
Distribute candies in a binary tree
Split Array Largest Sum
Scrambled String
Find the String
Articulation Point - I
Stock Buy and Sell – Max 2 Transactions Allowed
Largest rectangular sub-matrix whose sum is 0
Vertex Cover
Candy
Better String
Count Lucky Permutations
Count the Substring
Select Nodes
Largest Sum Cycle
Fixing Two swapped nodes of a BST
Shortest Path Using Atmost One Curved Edge
Avoid Explosion
Walls Coloring II
Divide in Incremental Groups
Max min Height
Maximum Number of coins
Median of the Subarrays
Cake Distribution Problem
Geekina Hate 1s
Making A Large Island
Minimum element in BST
Reverse a String
First n Fibonacci
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