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BASIC (14)
EASY (95)
MEDIUM (137)
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Linked List Group Reverse
Binary Tree to DLL
Min distance between two given nodes of a Binary Tree
Max rectangle
LRU Cache
Alien Dictionary
Trapping Rain Water
Histogram Max Rectangular Area
Find median in a stream
The Painter's Partition Problem-II
Edit Distance
Median in a row-wise sorted Matrix
Longest valid Parentheses
N-Queen Problem
Geek collects the balls
Rotate Array
Find Length of Linked List
Sum Except First and Last
Linked List Insertion At End
Minimum element in BST
Array Search
Reverse a String
First n Fibonacci
Count the characters
Rotate Array by One
Array Subset
Min and Max in Array
GCD of Array
Finding Position
Sorting Elements of an Array by Frequency
7 Segment Display
Rearrange characters
Nearly Sorted Algorithm
Sort a linked list of 0s, 1s and 2s
Add Number Linked Lists
Add 1 to a Linked List Number
Detect Loop in linked list
Insert in Sorted Circular Linked List
Count BST nodes that lie in a given range
Quick Sort
Bottom View of Binary Tree
Intersection in Y Shaped Lists
Diameter of a Binary Tree
Heap Sort
Merge two sorted linked lists
Sum Tree
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
Vertical Tree Traversal
Merge K sorted linked lists
Find the number of islands
Is Binary Tree Heap
Dijkstra Algorithm
Minimum Spanning Tree
Interleaved Strings
Implement Atoi
Maximum Difference
Palindrome Linked List
Strongly Connected
Bipartite Graph
Merge two BST 's
Count distinct elements in every window
Merge k Sorted Arrays
Bridge edge in a graph
Sort a stack
Top View of Binary Tree
Level order traversal
Merge Sort for Linked List
Union of Two Linked Lists
Populate Inorder Successor for all nodes
Isomorphic Trees
Predecessor and Successor
Deletion and Reverse in Circular Linked List
Duplicate Subtrees
Kth Ancestor in a Tree
Path Count in Directed Graph
Mother Vertex
Power Of Numbers
Maximum occured integer
Stock buy and sell
Kadane's Algorithm
Majority Element
Count Inversions
Two Repeated Elements
Indexes of Subarray Sum
Triplet Sum in Array
Spirally traversing a matrix
Distance of nearest cell having 1
Unit Area of largest region of 1's
Subarray with 0 sum
Longest Consecutive Subsequence
Strings Rotations of Each Other
Postfix Evaluation
Stock span problem
Next Greater Element
Infix to Postfix
K Sized Subarray Maximum
Kth smallest element
Activity Selection
Fractional Knapsack
Job Sequencing Problem
Minimum Platforms
Largest number in K swaps
Minimum number of jumps
Longest Common Subsequence
Allocate Minimum Pages
Preorder to BST
Find whether path exist
Rotten Oranges
Steps by Knight
Overlapping Intervals
Word Break
Generate Parentheses
Sort 0s, 1s and 2s
Max and Min Products
Single Among Doubles in a Sorted
Count Occurences of Anagrams
Smallest number with at least n trailing zeroes in factorial
Row with max 1s
Maximum distinct elements after removing K elements
Count the Reversals
Factorials of large numbers
k largest elements
Smallest distinct window
Longest substring with distinct characters
Longest Palindrome in a String
K closest elements
First negative in every window of size k
Minimize the Heights II
Print N-bit binary numbers having more 1s than 0s
Valid Substring
Minimum Swaps for Bracket Balancing
Permutations of a String
Subsequence matching
Ruling Pair
Count of sum of consecutives
Subset Sums
N Digit numbers with digits in increasing order
Knight Walk
Permutation with Spaces
Choose and Swap
Fact Digit Sum
Game with String
Find the Safe Position
Next Permutation
Rank The Permutations
Smaller on Left
Longest Repeating Subsequence
Finding Profession
Stream First Non-repeating
Segregate even and odd nodes in a Linked List
Replace O's with X's
Check Mirror in N-ary tree
Find the string in grid
Nodes at even distance
Count the paths
Floyd Warshall
Negative weight cycle
Flood fill Algorithm
Shortest Source to Destination Path
Recursively Remove Adjacent Duplicates
Reverse a linked list
Remove duplicates from an unsorted linked list
Split a Linked List into two halves
Delete in a Doubly Linked List
Reverse a Doubly Linked List
Check for BST
Right View of Binary Tree
Mirror Tree
Height of Binary Tree
Kth from End of Linked List
Middle of a Linked List
Check If Circular Linked List
Left View of Binary Tree
Transform to Sum Tree
Intersection Sorted Linked Lists
Queue using two Stacks
Remove Duplicates from a Sorted Linked List
Stack using two queues
Level Order in spiral form
Reverse Level Order Traversal
DFS of Graph
BFS of graph
Root to leaf path sum
Lowest Common Ancestor in a BST
Binary Search
Largest subarray of 0's and 1's
Binary Tree to BST
Leaves at Same Level or Not
Josephus problem
Delete in a Singly Linked List
Kth largest element in BST
Minimum distance in an Array
Array Duplicates
Max Level Sum in Binary Tree
Special Stack
Inorder Successor in BST
Max and min element in Binary Tree
Reverse Using Stack
Find length of Loop
Queue Reversal
Reverse first K of a Queue
Delete Mid of a Stack
Rotate doubly Linked List
Deque Implementations
Equilibrium Point
Array Leaders
Print adjacency list
Anagram
Non Repeating Character
Parenthesis Checker
Minimum Cost of ropes
N meetings in one room
Largest number with given sum
First Repeating Element
Union of Arrays with Duplicates
Missing in Array
Intersection of Arrays with Distinct
Max Value Permutation
Non-Repeating Element
Maximize sum after K negations
Common in 3 Sorted Arrays
Sorted and Rotated Minimum
String Duplicates Removal
Min sum formed by digits
Move all negative elements to end
String Manipulation
Find Pair Given Difference
Largest Permutation
Swap and Maximize
Second most repeated string in a sequence
Number of occurrence
Convert an array to reduced form
First Repeated Character
Min Number of Flips
Two sum -Pairs with 0 Sum
Hungry Pizza Lovers
Maximum sum of increasing order elements from n arrays
Merge two binary Max heaps
Palindrome String
Left out candies
Print Bracket Number
Shop in Candy Store
Minimum Operations
Palindrome
Shortest path from 1 to n
Smallest number with sum of digits as N and divisible by 10^N
Maximize Toys
Raju and coins
Largest number possible
Page Faults in LRU
Check if it is possible to survive on Island
Recursive sequence
Arithmetic Number
Print Pattern
Sum of dependencies in a graph
Reverse an Array
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