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BASIC (3)
EASY (52)
MEDIUM (60)
HARD (12)
Pairwise swap elements of a linked list
Delete nodes having greater value on right
Reverse a Doubly Linked List
Height of Binary Tree
Balanced Tree Check
Intersection Sorted Linked Lists
Find Transition Point
Remove Duplicates from a Sorted Linked List
Insert a node in a BST
Identical Trees
Binary Tree to BST
Delete in a Singly Linked List
Kth largest element in BST
Minimum distance in an Array
Array Duplicates
Insert in a Sorted List
More than n/k Occurrences
Symmetric Tree
Leaf under budget
Reverse first K of a Queue
Predict the Column
First Set Bit
Rightmost different bit
Check K-th Bit
Power of 2
Frequencies in a Limited Array
Equilibrium Point
Print adjacency list
Sum of upper and lower triangles
Print Matrix in snake Pattern
Matrix Boundary Traversal
Winner of an election
Count number of hops
Roman Number to Integer
Move All Zeroes to End
Second Largest
Convert array into Zig-Zag fashion
Rotate Bits
Number of occurrence
String's Count
Find the closest pair from two arrays
Palindrome String
Minimum Operations
Max Sum Subarray of size K
Sum 1 to n Divisors
Reach the Nth point
Perfect Numbers
Largest number possible
Form a number divisible by 3 using array digits
Surround the 1's
Letters Collection
Smallest window containing 0, 1 and 2
Reverse a String
First n Fibonacci
Largest Element in Array
Reverse alternate nodes in Link List
Merge 2 sorted linked list in reverse order
Multiply two strings
Duplicate Subtree
Find Common Nodes in two BSTs
Binary Tree to CDLL
K Sum Paths
Leftmost and rightmost nodes of binary tree
Isomorphic Trees
Normal BST to Balanced BST
Mother Vertex
Wave Array
Indexes of Subarray Sum
Make Matrix Beautiful
Boolean Matrix
Subarray with 0 sum
Stickler Thief
Lucky Numbers
Top K Frequent in Array
4 Sum - All Quadruples
Number of subarrays with maximum values in given range
Consecutive 1's not allowed
Pythagorean Triplet
Painting the Fence
Longest subarray with sum divisible by K
Check if a string is repetition of its substring of k-length
Column name from a given column number
Substrings with K Distinct
Sum of XOR of all pairs
Longest Substring with K Uniques
Largest Sum Subarray of Size at least K
Minimize the Heights II
First and Last Occurrences
Minimum Deletions
Number following a pattern
Bleak Numbers
Game of XOR
Max Sum Increasing Subsequence
Sequence of Sequence
Perfect Sum Problem
Knapsack with Duplicate Items
Partition Equal Subset Sum
Count possible ways to construct buildings
Array Pair Sum Divisibility Problem
Number of paths
Smith Number
Transitive closure of a Graph
Replace O's with X's
Find the string in grid
Techfest and the Queue
Remove K Digits
Find duplicate rows in a binary matrix
Sort for Singly Linked List
Unique Number III
Maximum Meetings in One Room
Minimum Multiplications to reach End
Number Of Enclaves
Maximum Sum Combination
Floor in BST
Grinding Geek
AVL Tree Deletion
Nodes at given distance in binary tree
Search Pattern
Number of distinct subsequences
Wildcard string matching
Palindromic Partitioning
Split Array Largest Sum
Find the String
Largest rectangular sub-matrix whose sum is 0
Candy
Better String
Making A Large Island
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