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BASIC (14)
EASY (98)
MEDIUM (186)
HARD (18)
Smallest divisible number
Peak element
Print 1 To N Without Loop
Array Search
Binary Array Sorting
Sum of Digits of a Number
Addition Under Modulo
Binary Array Sorting
Segregate Even and Odd numbers
Last index of One
Rotate Array by One
Last index of a character in the string
Longest Increasing Subarray
Minimum difference pair
Sorting Elements of an Array by Frequency
Rotate a Linked List
Add Number Linked Lists
Rearrange a linked list
Add 1 to a Linked List Number
Detect Loop in linked list
Insert in Sorted Circular Linked List
Merge Sort
Bottom View of Binary Tree
Intersection in Y Shaped Lists
Diameter of a Binary Tree
Merge two sorted linked lists
Sum Tree
Construct Binary Tree from Parent Array
Connect Nodes of Levels
Flattening a Linked List
Diagonal Tree Traversal
Tree Boundary Traversal
Directed Graph Cycle
Undirected Graph Cycle
LCA in Binary Tree
Maximum difference between node and its ancestor
Largest subarray with 0 sum
Topological sort
Vertical Tree Traversal
Merge K sorted linked lists
Find the number of islands
Serialize and deserialize a binary tree
Linked List to Binary Tree
Remove loop in Linked List
Dijkstra Algorithm
Minimum Spanning Tree
Largest BST
Implement Atoi
Palindrome Linked List
Strongly Connected
Bipartite Graph
Number of root to leaf paths
Merge two BST 's
Count distinct elements in every window
Merge k Sorted Arrays
Bridge edge in a graph
Find triplets with zero sum
Sort a stack
Top View of Binary Tree
k-th Smallest in BST
Union of Two Linked Lists
Pair Sum in BST
Construct Tree from Inorder & Preorder
Vertical sum
Maximum path sum from any node
Children Sum in a Binary Tree
Deletion and Reverse in Circular Linked List
Kth Ancestor in a Tree
ZigZag Tree Traversal
Tower Of Hanoi
Smallest Positive Missing
Power Of Numbers
Maximum occured integer
Maximum Index
Rotate Array
Kadane's Algorithm
Majority Element
Count Inversions
Two Repeated Elements
Unique BST's
Union of 2 Sorted with Duplicates
Indexes of Subarray Sum
Triplet Sum in Array
Merge Without Extra Space
Possible paths between 2 vertices
Boolean Matrix
Spirally traversing a matrix
Search in a sorted Matrix
Distance of nearest cell having 1
Unit Area of largest region of 1's
Subarray with 0 sum
Longest Consecutive Subsequence
Case-specific Sorting of Strings
Next Greater Element
K Sized Subarray Maximum
Nearly sorted
Activity Selection
Fractional Knapsack
Job Sequencing Problem
Minimum Platforms
Combination Sum
Minimum Jumps
Ways to Reach the n'th Stair
Longest Increasing Subsequence
Longest Common Subsequence
0 - 1 Knapsack Problem
Number of Unique Paths
Equal Sum Partition
X Total Shapes
Find whether path exist
Rotten Oranges
Steps by Knight
Guard in a Bank
Maximize The Cut Segments
Print Anagrams Together
Rotate by 90 degree
Overlapping Intervals
Closest Three Sum
Word Break
Generate Parentheses
Word Search
Word Boggle
4 Sum - All Quadruples
Sort 0s, 1s and 2s
Maximum Sub Array
Large Factorial
Longest Span in two Binary Arrays
Maximize Number of 1's
Equivalent Sub-Arrays
Consecutive 1's not allowed
Single Among Doubles
Pair Sum Closest to 0
Search in Rotated Sorted Array
Maximum Intervals Overlap
Form the Largest Number
Longest subarray with sum divisible by K
Row with max 1s
Palindrome SubStrings
Form a palindrome
Longest Subarray with Sum K
Factorials of large numbers
Length of the longest substring
Longest Substring with K Uniques
K-th element of two Arrays
Rod Cutting
Minimum swaps and K together
Maximize the sum of selected numbers from a sorted array to make it empty
Longest Palindromic Subsequence
First negative in every window of size k
Number of palindromic strings
First and Last Occurrences
Minimum Deletions
Minimum number of deletions
Permutations of a String
Queries for counts of multiples in an array
Max Sum Increasing Subsequence
Minimum cost to fill given weight in a bag
Coin Change (Count Ways)
Coin Change (Minimum Coins)
Count ways to N'th Stair(Order does not matter)
Maximum path sum in matrix
Partition Equal Subset Sum
Number of paths
Sisters and coins
Number of paths in a matrix with k coins
Sum of Query II
Next Permutation
Nitika and her queries
Longest alternating subsequence
Stream First Non-repeating
Buying Vegetables
Segregate even and odd nodes in a Linked List
Largest square formed in a matrix
Kth Largest in a Stream
Snake and Ladder Problem
Special Matrix
Queries on a Matrix
Count the paths
Floyd Warshall
Negative weight cycle
Flood fill Algorithm
Shortest Source to Destination Path
Missing Point of a Parallelogram
Jump Game
Max Diff Elements and Indexes
Subset Sum Problem
Form a palindrome
Covid Spread
3 Sum Closest
Subarrays with sum K
Partition a Linked List around a given value
Searching an element in a sorted array (Ternary Search)
Distribute N candies among K people
Substrings of length k with k-1 distinct elements
Clone a stack without using extra space
Number of Provinces
Shortest Prime Path
Minimum times A has to be repeated such that B is a substring of it
IPL 2021 - Match Day 2
Maximum Value
Reorder List
Binary Tree to DLL
Clone List with Next and Random
Min distance between two given nodes of a Binary Tree
LRU Cache
Alien Dictionary
Fixing Two nodes of a BST
Max Path Sum 2 Special Nodes
Trapping Rain Water
Minimum Cost Path
Light the Tree
Ugly Numbers
Edit Distance
Median in a row-wise sorted Matrix
Word Break - 2
N-Queen Problem
Number of subsets with product less than k
Find all Critical Connections in the Graph
Reverse a linked list
Frequency in a Linked List
Pairwise swap elements of a linked list
Remove duplicates from an unsorted linked list
Check for BST
Right View of Binary Tree
K distance from root
Mirror Tree
Maximum Width of Tree
Delete without head pointer
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
Transform to Sum Tree
Intersection Sorted Linked Lists
Find Transition Point
Remove Duplicates from a Sorted Linked List
Stack using two queues
Level Order in spiral form
DFS of Graph
BFS of graph
Identical Trees
Root to leaf path sum
Nodes without a Sibling
Largest subarray of 0's and 1's
Level Order Line by Line
BST Keys in a Range
Odd even level difference
Leaves at Same Level or Not
Delete in a Singly Linked List
Kth largest element in BST
Array Duplicates
Special Stack
Three way partitioning
Level order traversal
Intersection of Two Linked Lists
Symmetric Tree
Find length of Loop
Reverse first K of a Queue
Learn to Comment
Learning Macros
Swap values using References
Digits In Factorial
Primality Test
Modular Inverse
Equilibrium Point
Array Leaders
Rotate by 90 degree
Parenthesis Checker
Minimum Cost of ropes
N meetings in one room
Largest number with given sum
Count ways to N'th Stair
Union of Arrays with Duplicates
Missing in Array
Product array puzzle
Search an element in sorted and rotated array
Intersection of Arrays with Distinct
Missing And Repeating
k sorted array
Common in 3 Sorted Arrays
Sorted and Rotated Minimum
Search in a Row-Column sorted matrix
Move all negative elements to end
Chocolate Distribution Problem
Count the triplets
Pair with greatest product in array
Bitonic Point
Amend The Sentence
Alternate Positive Negative
Palindrome Sentence
Two Sum - Pair with Given Sum
Special array reversal
Two sum -Pairs with 0 Sum
Element with left side smaller and right side greater
Length of longest subarray
Maximum sum of subarray less than or equal to x
Four Elements
Palindrome String
Number of 1 Bits
Maximum Sum Problem
Shortest path from 1 to n
Maximize Toys
Largest number possible
Page Faults in LRU
Penalty Shooters
Trailing zeroes in factorial
Make Zeroes
Farthest number
Choose and Swap
Earthquake and the Paint Shop
Count all possible paths from top left to bottom right
Plus One
Queue using stack
Largest value in each level
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