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National Institute of Technology, Durgapur (NIT Durgapur)
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C++, Java
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BASIC (26)
EASY (130)
MEDIUM (193)
HARD (25)
Rotate a Linked List
Sort a linked list of 0s, 1s and 2s
Add Number Linked Lists
Rearrange a linked list
Add 1 to a Linked List Number
Detect Loop in linked list
Check for BST
Merge Sort
Quick Sort
Binary Tree from Inorder and Postorder
Bottom View of Binary Tree
Delete without head pointer
Intersection in Y Shaped Lists
Diameter of a Binary Tree
Merge two sorted linked lists
Flattening a Linked List
Tree Boundary Traversal
Delete a node from BST
Directed Graph Cycle
Undirected Graph Cycle
LCA in Binary Tree
Two Stacks in an Array
The Celebrity Problem
Topological sort
Find the number of islands
Max sum in the configuration
Get Min from Stack
Gas Station
Linked List to Binary Tree
Remove loop in Linked List
Palindrome Linked List
Rat in a Maze
Bipartite Graph
Merge k Sorted Arrays
Bridge edge in a graph
Sort a stack
Top View of Binary Tree
k-th Smallest in BST
Level order traversal
Ancestors in Binary Tree
Pair Sum in BST
Root to Leaf Paths
Complete Binary Tree
Populate Inorder Successor for all nodes
Arrange Consonants and Vowels
Vertical sum
Find length of Loop
Duplicate Subtrees
Vertical Width of a Binary Tree
Gray to Binary Conversion
Maximum occured integer
Rotate Array
Count Inversions
Two Repeated Elements
Union of 2 Sorted Arrays
Possible paths between 2 vertices
Spirally traversing a matrix
Rotate by 90 degree
Distance of nearest cell having 1
Longest Consecutive Subsequence
Stock span problem
Next Greater Element
Infix to Postfix
Target Sum Combinations
M-Coloring Problem
Stickler Thief
Ways to Reach the n'th Stair
Optimal Strategy For A Game
Sum of all substrings of a number
Number of Unique Paths
Kth Smallest
Rotten Oranges
Container With Most Water
Rotate by 90 degree
Radix Sort
Closest Three Sum
Prerequisite Tasks
Sort 0s, 1s and 2s
Paths to reach origin
Pascal Triangle
Maximize Number of 1's
Search in Rotated Sorted Array
Row with max 1s
Swapping pairs make sum equal
Nuts and Bolts Problem
Rotate a Matrix
Next Smaller Element
Max Sum without Adjacents
Length of the longest substring
Longest Substring with K Uniques
K closest elements
First negative in every window of size k
First and Last Occurrences
Permutations of a String
Sum of Products
Modular Exponentiation
Maximum Tip Calculator
Maximize dot product
Minimum cost to fill given weight in a bag
String Subsequence
Mobile numeric keypad
Fibonacci Sum
Smallest number
Trail of ones
K-Palindrome
Longest subsequence-1
Minimum Cost To Make Two Strings Identical
Geek and its Game of Coins
Maximum path sum in matrix
Minimum steps to destination
Subset Sums
Prime Pair with Target Sum
Next Permutation
Smaller on Left
Rotate Each Row of Matrix K Times
Stream First Non-repeating
Check If two Line segments Intersect
Segregate even and odd nodes in a Linked List
Number of Rectangles in a Circle
Largest square formed in a matrix
Rat Maze With Multiple Jumps
Integral Points Inside Triangle
Replace O's with X's
Rohan's Love for Matrix
Floyd Warshall
Flood fill Algorithm
Divisibility tree
Spiral Matrix
Help Classmates
All Palindromic Partitions
Bellman-Ford
Remove K Digits
Construct list using given q XOR queries
Number of Provinces
BST to max heap
Remove all occurences of duplicates in a linked list
Subsets
IPL 2021 - Match Day 2
All Unique Permutations of an array
Course Schedule
Reverse a Stack
Interleave the First Half of the Queue with Second Half
Number of Distinct Islands
Shortest Distance in a Binary Maze
Minimum Multiplications to reach End
Number Of Enclaves
Eventual Safe States
City With the Smallest Number of Neighbors at a Threshold Distance
Number of Ways to Arrive at Destination
Path With Minimum Effort
Cheapest Flights Within K Stops
Shortest Path in Undirected Graph
Shortest path in Directed Acyclic Graph
Koko Eating Bananas
Longest subarray with Atmost two distinct integers
Longest Repeating Character Replacement
Count Subarray with k odds
Count Substring
Binary subarray with sum
Sum of subarray minimums
Frog Jump
Asteroid Collision
Geek's Training
Grid Path 2
Sum of subarray ranges
Maximum point you can obtain from cards
Subarrays with K Distinct Integers
Combination Sum Without Repetition
Shortest Path in Weighted undirected graph
Prefix to Infix Conversion
Prefix to Postfix Conversion
Delete all occurrences of a given key in a doubly linked list
Postfix to Prefix Conversion
Postfix to Infix Conversion
Minimum Absolute Difference In BST
Minimum Window Substring
Stickler Thief II
Partitions with Given Difference
Index of the First Occurrence of pattern in a text
Triangle Path Sum
Maximum Value
Next Greater Element in Circular Array
Find the first node of loop in linked list
Unique Paths in a Grid
Number of Good Components
Find Kth permutation
Minimize the Difference
Pairs violating the BST property
Kth common ancestor in BST
Kth Missing Positive Number in a Sorted Array
Set Matrix Zeros
Find All Triplets with Zero Sum
Lexicographically Largest String After K Deletions
Linked List Group Reverse
Binary Tree to DLL
Clone List with Next and Random
Serialize and deserialize a binary tree
Max rectangle
Alien Dictionary
String Permutations
Trapping Rain Water
Histogram Max Rectangular Area
Solve the Sudoku
Minimum Cost Path
Count Pairs in an Array
Search Pattern
Minimum Points To Reach Destination
Strictly Increasing Array
N-Queen Problem
Articulation Point - II
Sorted Linked List to BST
Count the number of subarrays
Articulation Point - I
Min Chars to Add for Palindrome
Maximum Connected group
Minimize Max Distance to Gas Station
Account Merge
Chocolates Pickup
Reverse a linked list
Node at a given index in linked list
Linked list of strings forms a palindrome
Delete in a Doubly Linked List
Inorder Traversal
Reverse a Doubly Linked List
Bubble Sort
Selection Sort
Insertion Sort
Right View of Binary Tree
K distance from root
Mirror Tree
Height of Binary Tree
Balanced Tree Check
Kth from End of Linked List
Middle of a Linked List
Left View of Binary Tree
Delete Middle of Linked List
Remove Duplicates from a Sorted Linked List
Postorder Traversal
Reverse Level Order Traversal
DFS of Graph
BFS of graph
Root to leaf path sum
Nodes without a Sibling
Insertion at doubly linked list
Lowest Common Ancestor in a BST
Binary Search
Level Order Line by Line
Toeplitz matrix
Josephus problem
You and your books
Max distance between same elements
Delete in a Singly Linked List
Array Duplicates
Three way partitioning
Index of an Extra Element
Split Linked List Alternatingly
Counting Sort
Max and min element in Binary Tree
Reverse Using Stack
Queue Reversal
Reverse first K of a Queue
Delete Mid of a Stack
Xoring and Clearing
Delete Array
Reverse an Array
Pair Sum Existence
Longest Consecutive 1's
Array Leaders
Floor in a Sorted Array
Intersection of two sorted arrays
Non Repeating Character
Count ways to N'th Stair
First Repeating Element
Union of Arrays with Duplicates
Missing in Array
Delete Head of Linked List
Delete Head of Doubly Linked List
Intersection of Arrays with Distinct
Max Value Permutation
Find k-th missing element
Count the elements
Find the closest number
Move All Zeroes to End
Chocolate Distribution Problem
Find Pair Given Difference
Permutations in array
Swap and Maximize
Left most and right most index
Single Number
Alternate Positive Negative
Remove Consecutive Characters
Convert a sentence into its equivalent mobile numeric keypad sequence
Kth distance
Nearest multiple of 10
Second Largest
Convert array into Zig-Zag fashion
Two Sum - Pair with Given Sum
Find all pairs with a given sum
Number of occurrence
K-Pangrams
Sum Pair closest to target
Find missing in second array
Two sum -Pairs with 0 Sum
Segregate 0s and 1s
Count the Zeros
First and Second Smallests
K-th missing element
Pair with given sum in a sorted array
Print Bracket Number
Shop in Candy Store
Odd Even Problem
Binary representation of next number
Padovan Sequence
Extract the Number from the String
Find the Highest number
The Nth Fibonnaci
Armstrong Numbers
Reverse Bits
Nth Fibonacci Number
Swap two nibbles in a byte
Party of Couples
Count numbers containing 4
The Palindrome Pattern
Compare two fractions
Natural Sum
Juggler Sequence
Summed Matrix
Row with Minimum 1s
Coverage of all Zeros in a Binary Matrix
Inorder Traversal and BST
Array to BST
Find maximum volume of a cuboid
Insert an Element at the Bottom of a Stack
Find pairs with given sum in doubly linked list
Divisor Game
Search in Linked List
Remove duplicates from a sorted doubly linked list
Array to Linked List
Binary Search Trees
Introduction to Doubly Linked List
Reverse both parts
Sorting Items
Eye's Contact
Geekland Fair
Linked List Insertion At Beginning
Count Minimum Swaps
Two Swaps
Max Consecutive Bit
Find Length of Linked List
Preorder Traversal
Search a node in BST
Linked List Insertion At End
Minimum element in BST
Is Linked List Length Even?
Identical Linked Lists
Alternates in an Array
Print 1 To N Without Loop
Array Search
Sorted Array Search
First n Fibonacci
Searching in an Array
Value equal to index value
Quick Left Rotation
First 1 in a Sorted Binary Array
Largest Element in Array
Rotate Array by One
Rotating an Array
Remove Duplicates from unsorted array
Min and Max in Array
House Robber
Factorial
Geekland Elections
Valid Triangle
Doubly Linked List Traversal
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