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mr_banerjee
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Guru Nanak Institute of Technology (GNIT) Kolkata
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C++, Python, Java
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1297
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BASIC (31)
EASY (139)
MEDIUM (195)
HARD (38)
Linked List Group Reverse
Reorder List
Binary Tree to DLL
Clone List with Next and Random
Max rectangle
Maximum subset XOR
Alien Dictionary
AVL Tree Deletion
Nodes at given distance in binary tree
Max Path Sum 2 Special Nodes
String Permutations
Trapping Rain Water
Histogram Max Rectangular Area
Solve the Sudoku
Minimum Cost Path
Word Ladder I
Burning Tree
Next Smallest Palindrome
Search Pattern (KMP-Algorithm)
Count Smaller elements
Longest Prefix Suffix
Number of distinct subsequences
Print all LCS sequences
Edit Distance
Check Tree Traversal
Boolean Parenthesization
Longest valid Parentheses
Articulation Point - II
Smallest Positive Integer that can not be represented as Sum
Reverse a sublist of a linked list
Word Ladder II
Split Array Largest Sum
Shortest Path by Removing K walls
Articulation Point - I
Maximum Connected group
Account Merge
Chocolates Pickup
Largest Sum Cycle
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
Merge 2 sorted linked list in reverse order
Detect Loop in linked list
Merge Sort
Quick Sort
Binary Tree from Inorder and Postorder
Bottom View of Binary Tree
Intersection in Y Shaped Lists
Diameter of a Binary Tree
Heap Sort
Merge two sorted linked lists
Sum Tree
Connect Nodes of Levels
Flattening a Linked List
Tree Boundary Traversal
Directed Graph Cycle
Undirected Graph Cycle
LCA in Binary Tree
Two Stacks in an Array
The Celebrity Problem
Largest subarray with 0 sum
Topological sort
Vertical Tree Traversal
Merge K sorted linked lists
Find the number of islands
Find kth element of spiral matrix
Get Min from Stack
Wildcard Pattern Matching
Check if subtree
Is Binary Tree Heap
Validate an IP Address
Remove loop in Linked List
Dijkstra Algorithm
Minimum Spanning Tree
Multiply two strings
Minimum Swaps to Sort
Implement Atoi
Palindrome Linked List
Strongly Connected
Rat in a Maze Problem - I
Bipartite Graph
Find triplets with zero sum
Sort a stack
Top View of Binary Tree
Root to Leaf Paths
K Sum Paths
Leftmost and rightmost nodes of binary tree
Construct Tree from Inorder & Preorder
Maximum path sum from any node
Children Sum in a Binary Tree
Kth Ancestor in a Tree
ZigZag Tree Traversal
Mother Vertex
Ceil in BST
Smallest Positive Missing
Power Of Numbers
Rearrange Array Alternately
Stock buy and sell
Rotate Array
Kadane's Algorithm
Majority Element
Count Inversions
Indexes of Subarray Sum
Count the number of possible triangles
Triplet Sum in Array
Merge Without Extra Space
Level of Nodes
Make Matrix Beautiful
Spirally traversing a matrix
Search in a sorted Matrix
Distance of nearest cell having 1
Subarray with 0 sum
Longest Consecutive Subsequence
Stock span problem
Next Greater Element
K Sized Subarray Maximum
Minimum Platforms
Minimum Jumps
Stickler Thief
Longest Increasing Subsequence
Longest Common Subsequence
Lucky Numbers
Allocate Minimum Pages
Zero Sum Subarrays
Kth Smallest
Shortest Common Supersequence
Nth Catalan Number
Rotten Oranges
Maximize The Cut Segments
Top K Frequent in Array
Stock Buy and Sell – Multiple Transaction Allowed
Prerequisite Tasks
4 Sum - All Quadruples
Sort 0s, 1s and 2s
Maximum Sub Array
Pascal Triangle
Maximum Index
Flip Bits
Single Among Doubles in a Sorted
Pythagorean Triplet
Search in Rotated Sorted Array
Form the Largest Number
Alternate Vowel and Consonant String
Add Binary Strings
Maximum Product Subarray
Row with max 1s
Swapping pairs make sum equal
Form a palindrome
Longest Subarray with Sum K
Sum of two large numbers
Factorials of large numbers
Reverse each word in a given string
k largest elements
Sum of XOR of all pairs
Longest Common Substring
Longest substring with distinct characters
Longest Substring with K Uniques
Longest Palindrome in a String
K-th element of two Arrays
Rod Cutting
Longest Palindromic Subsequence
First negative in every window of size k
Minimize the Heights II
First and Last Occurrences
Permutations of a String
Number following a pattern
Subarrays Product Less than K
Unique Number II
Largest prime factor
Minimum number of deletions and insertions
Coin Change (Count Ways)
Gold Mine Problem
Perfect Sum Problem
Power Set
Knapsack with Duplicate Items
nCr
Check if possible to move from given coordinate to desired coordinate
Probability of Knight
Magic Triplets
Subset Sums
Number of paths
Find Prime numbers in a range
Smith Number
Longest Repeating Subsequence
Stream First Non-repeating
Transitive closure of a Graph
Replace O's with X's
Special Matrix
Floyd Warshall
Flood fill Algorithm
Shortest Source to Destination Path
Recursively Remove Adjacent Duplicates
Preorder traversal (Iterative)
Iterative Postorder
Subset Sum Problem
Form a palindrome
All Palindromic Partitions
Bellman-Ford
Subarrays with sum K
Partition a Linked List around a given value
Number of Provinces
Flatten binary tree to linked list
Course Schedule
Clone an Undirected Graph
Overlapping Intervals
Reverse a Stack
Maximum Meetings in One Room
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 Islands
Path With Minimum Effort
Connecting the graph
Shortest Path in Undirected Graph
Maximum Stone Removal
Shortest path in Directed Acyclic Graph
Frog Jump
Minimal Cost
Geek's Training
Aggressive Cows
Shortest Path in Weighted undirected graph
Print Longest Increasing Subsequence
Partitions with Given Difference
Index of the First Occurrence of pattern in a text
Floor in BST
Intersection Point in Y Shaped Linked Lists
Final Destination
Fraction pairs with sum 1
Reverse a linked list
Frequency in a Linked List
Delete N nodes after M nodes of a linked list
Node at a given index in linked list
Delete nodes having greater value on right
Remove duplicates from an unsorted linked list
Inorder Traversal
Reverse a Doubly Linked List
Selection Sort
Right View of Binary Tree
K distance from root
Mirror Tree
Two Mirror Trees
Delete without head pointer
Height of Binary Tree
Balanced Tree Check
Kth from End of Linked List
Middle of a Linked List
Check If Circular Linked List
Left View of Binary Tree
Delete Middle of Linked List
Find Transition Point
Remove Duplicates from a Sorted Linked List
Level Order in spiral form
Reverse Level Order Traversal
DFS of Graph
Insert a node in a BST
BFS of graph
Identical Trees
Root to leaf path sum
Square Root
Nodes without a Sibling
Lowest Common Ancestor in a BST
Binary Search
Remove Duplicates Sorted Array
Level Order Line by Line
Minimum Depth of a Binary Tree
Multiply two linked lists
Delete in a Singly Linked List
Kth largest element in BST
Minimum distance in an Array
Array Duplicates
Level order traversal
Inorder Successor in BST
Insert in a Sorted List
Level of a Node in Binary Tree
Max and min element in Binary Tree
Reverse Using Stack
Symmetric Tree
Find length of Loop
Median of BST
Queue Reversal
Reverse first K of a Queue
Sum of Leaf Nodes
Move all zeros to the front of the linked list
Delete Mid of a Stack
Predict the Column
Find the Frequency
K-th Bit is Set or Not
Power of 2
Wave 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
Anagram
Reverse Words
Minimum indexed character
Non Repeating Character
Parenthesis Checker
Minimum Cost of ropes
N meetings in one room
Count number of hops
First Repeating Element
Union of Arrays with Duplicates
Check Equal Arrays
Missing in Array
Product array puzzle
Roman Number to Integer
Missing And Repeating
Non-Repeating Element
Find Kth Rotation
Maximum no of 1's row
Move All Zeroes to End
String Duplicates Removal
Minimize the sum of product
Move all negative elements to end
Chocolate Distribution Problem
Minimize Difference in Task Priorities
Bitonic Point
Remove Consecutive Characters
Convert a sentence into its equivalent mobile numeric keypad sequence
Remove Duplicates
Sum of two numbers represented as arrays
Second Largest
Convert array into Zig-Zag fashion
Two Sum - Pair with Given Sum
Rotate Bits
Find all pairs with a given sum
Number of occurrence
Check if array is sorted
Longest Common Prefix of Strings
First Repeated Character
Two sum -Pairs with 0 Sum
At Least K Occurrences
Find the closest pair from two arrays
Merge two binary Max heaps
Palindrome String
Search array with adjacent diff at most k
Shop in Candy Store
Last Match
Minimum Operations
Number of 1 Bits
Max Sum Subarray of size K
Nth Fibonacci Number
Copy Set Bits in Range
Shortest path from 1 to n
Largest number possible
Check if it is possible to survive on Island
Form a number divisible by 3 using array digits
Find nth root of m
Left Index
Surround the 1's
Letters Collection
Print Pattern
Check if it is possible to convert one string into another with given constraints
Search insert position of K in a sorted array
Largest value in each level
Find XOR of numbers from L to R.
Maximum Depth Of Binary Tree
Max and Second Max
Strong Students in School
Frogs and Jumps
Minimum Integer
Lovely Cards
Unique Number of Occurrences
Print Linked List
Count Linked List Nodes
Size of Binary Tree
Count Leaves in Binary Tree
Postorder Traversal
Preorder Traversal
Search a node in BST
Peak element
Linked List Insertion At End
Minimum element in BST
Is Linked List Length Even?
Identical Linked Lists
Sum of Binary Tree
Reverse array in groups
Array Search
Sorted Array Search
Reverse a String
First n Fibonacci
Sort The Array
Immediate Smaller Element
Uncommon characters
Remove Spaces
Rotate Array by One
Array Subset
First and Second Smallests
Min and Max in Array
Odd or Even
Find position of set bit
Set the rightmost unset bit
Prime Number
Height of Heap
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