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BASIC (9)
EASY (52)
MEDIUM (58)
HARD (4)
Rotate a Linked List
Detect Loop in linked list
Quick Sort
Bottom View of Binary Tree
Diameter of a Binary Tree
Sum Tree
Connect Nodes of Levels
Diagonal Tree Traversal
LCA in Binary Tree
The Celebrity Problem
Largest subarray with 0 sum
Vertical Tree Traversal
Linked List to Binary Tree
Check if subtree
Is Binary Tree Heap
Minimum Spanning Tree
Interleaved Strings
Minimum Swaps to Sort
Palindrome Linked List
Closest in BST
Count distinct elements in every window
Merge k Sorted Arrays
Sort a stack
Top View of Binary Tree
Occurences of 2 as a digit
Construct tree from Inorder and LevelOrder
Largest Independent Set Problem
Diagonal sum in binary tree
Rotate Array
Kadane's Algorithm
Majority Element
Indexes of Subarray Sum
Count the number of possible triangles
Activity Selection
Fractional Knapsack
Job Sequencing Problem
Minimum Platforms
Stickler Thief
0 - 1 Knapsack Problem
Number of Unique Paths
Preorder to BST
Zero Sum Subarrays
Generate Parentheses
Max Sum without Adjacents
Smallest distinct window
Longest Substring with K Uniques
Longest Palindromic Subsequence
Minimum Cost To Make Two Strings Identical
Knapsack with Duplicate Items
Subset Sums
Number of paths
Sum of Query II
Iterative Inorder
Triplets with sum with given range
Preorder traversal (Iterative)
Construct list using given q XOR queries
Anti Diagonal Traversal of Matrix
Reverse a Stack
Reverse a linked list
Remove duplicates from an unsorted linked list
Inorder Traversal
Bubble Sort
Selection Sort
Insertion Sort
Check for BST
K distance from root
Mirror Tree
Maximum Width of Tree
Delete without head pointer
Height of Binary Tree
Middle of a Linked List
Left View of Binary Tree
Intersection Sorted Linked Lists
Level Order in spiral form
DFS of Graph
BFS of graph
Identical Trees
Root to leaf path sum
Square Root
Postorder from Inorder and Preorder
Lowest Common Ancestor in a BST
Binary Search
Minimum distance in an Array
Array Duplicates
Level order traversal
XOR of a given range
Symmetric Tree
Floor in a Sorted Array
Print adjacency list
Generate Binary Numbers
Minimum Cost of ropes
N meetings in one room
Reach a given score
Count ways to N'th Stair
Missing in Array
Search an element in sorted and rotated array
Non-Repeating Element
Maximum Possible Sum of Products
Count Substrings
Convert array into Zig-Zag fashion
Two Sum - Pair with Given Sum
Find missing in second array
Minimum Operations
Count Digits
Maximum Sum Problem
Squares in N*N Chessboard
Trailing zeroes in factorial
Largest value in each level
Silver and Gold
Negative Prefix
Size of Binary Tree
Count Leaves in Binary Tree
Postorder Traversal
Replace all 0's with 5
Sum of Binary Tree
At least two greater elements
First 1 in a Sorted Binary Array
Array Subset
Matching Pair
Binary Tree to DLL
Trapping Rain Water
Merge Without Extra Space
Sorted Linked List to BST
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