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SCHOOL (1)
BASIC (11)
EASY (103)
MEDIUM (135)
HARD (34)
Reverse alternate nodes in Link List
Merge 2 sorted linked list in reverse order
Implement Atoi
Palindrome Linked List
Print matrix in diagonal pattern
BST with Dead End
Merge two BST 's
Count distinct elements in every window
Duplicate Subtree
Find Common Nodes in two BSTs
Level order traversal
Peak element
Euler circuit and Path
Binary Tree to CDLL
K Sum Paths
Isomorphic Trees
Normal BST to Balanced BST
Smallest Positive Missing
Power Of Numbers
Wave Array
Rotate and delete
Maximum Index
Rotate Array
Kadane's Algorithm
Majority Element
Union of 2 Sorted Arrays
Indexes of Subarray Sum
Merge Without Extra Space
Level of Nodes
Boolean Matrix
Determinant of a Matrix
Subarray with 0 sum
Strings Rotations of Each Other
K Sized Subarray Maximum
Minimum Cost of ropes
Fractional Knapsack
Minimum Jumps
Detect Cycle using DSU
Stickler Thief
Optimal Strategy For A Game
Sum of all substrings of a number
Lucky Numbers
Kth Smallest
Implement Trie
Shortest Common Supersequence
Nth Catalan Number
Container With Most Water
Top K Frequent in Array
Word Break
Stock Buy and Sell – Multiple Transaction Allowed
4 Sum - All Quadruples
Sort 0s, 1s and 2s
Pascal Triangle
Number of subarrays with maximum values in given range
Flip Bits
Top k numbers in a stream
Pythagorean Triplet
Painting the Fence
Search in Rotated Sorted Array
Count pairs Sum in matrices
Sum of bit differences
Form the Largest Number
Add Binary Strings
Maximum Product Subarray
Longest subarray with sum divisible by K
Check if a string is repetition of its substring of k-length
Check if frequencies can be equal
Column name from a given column number
Substrings with K Distinct
Longest Subarray with Sum K
Next Smaller Element
Max Sum without Adjacents
Shuffle integers
Find the N-th character
Sum of XOR of all pairs
Longest Common Substring
Rod Cutting
LCS of three strings
Largest Sum Subarray of Size at least K
Minimize the Heights II
Transform to prime
First and Last Occurrences
Minimum Deletions
Number following a pattern
Bleak Numbers
Game of XOR
Modified Game of Nim
Maximize dot product
Max Sum Increasing Subsequence
Coin Change (Count Ways)
Sequence of Sequence
Gold Mine Problem
Perfect Sum Problem
Power Set
Knapsack with Duplicate Items
Partition Equal Subset Sum
Count possible ways to construct buildings
Count digit groupings of a number
Array Pair Sum Divisibility Problem
Number of paths
Nth Natural Number
Smith Number
Next Permutation
How Many X's?
Transitive closure of a Graph
Subset Sum Problem
Remove K Digits
Find duplicate rows in a binary matrix
Paths from root with a specified sum
Shortest Prime Path
Sort for Singly Linked List
Anti Diagonal Traversal of Matrix
Unique Number III
All Unique Permutations of an array
Course Schedule
Clone an Undirected Graph
Maximum Meetings in One Room
Buy Maximum Stocks
Graph is Tree or Not
Number Of Enclaves
Eventual Safe States
Majority Element - More Than n/3
Minimal Cost
Minimum Absolute Difference In BST
Maximum Sum Combination
Floor in BST
Water the plants
Empty the String
Shortest Subarray with Sum K
New Year Resolution
Grinding Geek
Kth common ancestor in BST
Shortest XY distance in Grid
Minimum Time
Split array in three equal sum subarrays
Pairwise swap elements of a linked list
Reverse a Doubly Linked List
Bubble Sort
Mirror Tree
Height of Binary Tree
Balanced Tree Check
Middle of a Linked List
Left View of Binary Tree
Intersection Sorted Linked Lists
Find Transition Point
Identical Trees
Binary Search
Remove Duplicates Sorted Array
Third largest element
Multiply two linked lists
Minimum distance in an Array
Array Duplicates
Index of an Extra Element
Insert in a Sorted List
More than n/k Occurrences
Symmetric Tree
Reverse first K of a Queue
Find Sum Pairs Across Two BSTs
Product of an Array
Learn to Comment
Learn to Comment - Java
Swap the array elements
Predict the Column
Learning Structs
Delete Array
Reverse an Array
First Set Bit
Rightmost different bit
Check K-th Bit
Power of 2
Frequencies in a Limited Array
Equilibrium Point
Array Leaders
Roof Top
Sum of upper and lower triangles
Print Matrix in snake Pattern
Matrix Boundary Traversal
Anagram
Winner of an election
String Rotated by 2 Places
Isomorphic Strings
Reverse Words
Panagram Checking
Non Repeating Character
Parenthesis Checker
Reach a given score
Count ways to N'th Stair
Union of Arrays with Duplicates
Missing in Array
Product array puzzle
Roman Number to Integer
Missing And Repeating
Move All Zeroes to End
String Duplicates Removal
Left most and right most index
Alternate Positive Negative
Facing the sun
Second Largest
Convert array into Zig-Zag fashion
Rotate Bits
Number of occurrence
String's Count
Play With OR
At Least K Occurrences
Find the closest pair from two arrays
Total count
Minimum Operations
Divisibility by 8
Max Sum Subarray of size K
Nth Fibonacci Number
Maximum Sum Problem
Shortest path from 1 to n
Sum 1 to n Divisors
Reach the Nth point
Perfect Numbers
Largest number possible
Form a number divisible by 3 using array digits
Tom and Jerry
Coverage of all Zeros in a Binary Matrix
Letters Collection
Print Pattern
Sum of dependencies in a graph
Triangle and Square
Choice
Pattern 4
Pattern 16
Print N to 1 without loop
Stock Buy and Sell – Max one Transaction Allowed
Introduction to Trees
Pass by Reference and Value
Weird Island
Maximum AND
Negative Prefix
Is it a Leap Year
Maximum Happiness
Array Game
Maximum Distance
Count the complement pairs
Binary Tree to DLL
Clone List with Next and Random
Distinct occurrences
AVL Tree Insertion
Nodes at given distance in binary tree
Max Circular Subarray Sum
Smallest window containing all characters
Search Pattern
Longest Prefix Suffix
Number of distinct subsequences
Wildcard string matching
Longest repeating and non-overlapping substring
Sum-string
Minimum Points To Reach Destination
Palindromic Partitioning
Strictly Increasing Array
Generalised Fibonacci numbers
Boolean Parenthesization
Longest valid Parentheses
Brackets in Matrix Chain Multiplication
Search Pattern (Rabin-Karp Algorithm)
Find all Critical Connections in the Graph
Distribute Candies
Split Array Largest Sum
Find the String
Stock Buy and Sell – Max 2 Transactions Allowed
Min Chars to Add for Palindrome
Largest rectangular sub-matrix whose sum is 0
Vertex Cover
Candy
Better String
Geekina Hate 1s
Making A Large Island
Asterisk or Question Mark?
Alternates in an Array
Count Odd and Even
Print 1 To N Without Loop
First n Fibonacci
Min and Max in Array
Odd or Even
Print 1 to n without using loops
Repetitive Addition Of Digits
Max Min
Naughty Geek
Naughty Geek
Search in a 2D Matrix
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