- Removing Stars From a String
- Maximum Length
- Add minimum characters
- Count Special Numbers
- Optimal Partition of String
- Minimum Steps Required
- Successful Pairs of Spells and Potions
- Array Pair Sum Divisibility Problem
- Shy Geek
- Minimum Cost For Tickets
- Shortest XY distance in Grid
- Design Browser History
- Check Completeness of a Binary Tree
- Maximum Possible Value
- Make array beautiful
- Yet another query problem
- Convert Sorted List to Binary Search Tree
- Maximum Triplet product
- Linked List Cycle II
- Find anagrams in linked list
- Sort the Students by Their Kth Score
- Minimum Time to Complete Trips
- Longest Common Substring
- Save Flowers
- Kth smallest element
- Find Missing And Repeating
- Best Node
- Update Queries
- Sort an Array
- Count Lattice Points Inside a Circle
- Optimal Array
- Find Duplicate Subtrees
- Maximize the Topmost Element After K Moves
- Get minimum element from stack
- Find All K-Distant Indices in an Array
- Count Artifacts That Can Be Extracted
- Construct Quad Tree
- Number of Good Components
- Find the Maximum Number of Marked Indices
- Find the Divisibility Array of a String
- Valid Compressed String
- Number of Zero-Filled Subarrays
- Implement Atoi
- Design a Number Container System
- Increment Submatrices by One
- Magical String
- Connect Nodes at Same Level
- Capacity To Ship Packages Within D Days
- Two Best Non-Overlapping Events
- Multiply two strings
- Fill the Matrix
- Minimum Operations to Reduce an Integer to 0
- Count Cyclic Paths
- Minimum Score by Changing Two Elements
- Binary Tree Zigzag Level Order Traversal
- Partition String Into Substrings With Values at Most K
- Distinct Prime Factors of Product of Array
- Good Stones
- Geeks Island
- Walls Coloring
- Prime List
- Minimum Fuel Cost to Report to the Capital
- Shortest Path with Alternating Colors
- Minimum Days
- As Far from Land as Possible
- Maximum Bipartite Matching
- Length of the longest subarray with positive product
- Fruit Into Baskets
- Mex Array
- Equal grouping
- Distinct Coloring
- Minimum times A has to be repeated such that B is a substring of it
- Best Team With No Conflicts
- Sort Integers by The Power Value
- Total Decoding Messages
- Cheapest Flights Within K Stops
- Find Closest Node to Given Two Nodes
- Snakes and Ladders
- Convert an array to reduced form
- Next Greater Element
- Minimum Operations
- Geeks And The String
- Palindrome Partitioning
- GCD Array
- Restore IP Addresses
- Minimum X (xor) A
- Non-decreasing Subsequences
- Subarray Sums Divisible by K
- Carpet into Box
- Using a Robot to Print the Lexicographically Smallest String
- Maximum Sum Circular Subarray
- Apply Discount to Prices
- Populating Next Right Pointers in Each Node II
- Longest Subarray With Maximum Bitwise AND
- Invalid Transactions
- Flip String to Monotone Increasing
- The Number of Weak Characters in the Game
- Find Bottom Left Tree Value
- Find the Index of the First Occurrence in a String
- Decode the Slanted Ciphertext
- Average Waiting Time
- Gas Station
- Rotate Image
- Reordered Power of 2
- Merging Details
- Decode Ways
- Maximum Number of Points with Cost
- Sum of two large numbers
- Longest Palindromic Substring
- Split Array into Consecutive Subsequences
- Reduce Array Size to The Half
- Longest Sub-Array with Sum K
- Valid Sudoku
- Knight Walk
- Max length chain
- Unique BST's
- Shortest Common Supersequence
- Partition Equal Subset Sum
- Optimal Strategy For A Game
- Maximize The Cut Segments
- Max sum subarray by removing at most one element
- Longest Increasing Subsequence
- Longest Common Subsequence
- Equal Sum Partition
- Egg Dropping Puzzle
- 0 - 1 Knapsack Problem
- nCr
- Minimum number of jumps
- Count ways to reach the n'th stair
- Count ways to N'th Stair(Order does not matter)
- Camel Case
- Trie | (Insert and Search)
- Renaming Cities
- Most frequent word in an array of strings
- Unique Subsets
- Minimum Spanning Tree using Kruskal
- M-Coloring Problem
- Detect Cycle using DSU
- Combination Sum
- Black and White
- Rat Maze With Multiple Jumps
- Largest number in K swaps
- Job Sequencing Problem
- Fractional Knapsack
- X Total Shapes
- Unit Area of largest region of 1's
- Strongly Connected Components (Kosaraju's Algo)
- Steps by Knight
- Rotten Oranges
- Possible paths between 2 vertices
- Mother Vertex
- Minimum Swaps to Sort
- Minimum Spanning Tree
- Minimum Cost Path
- Implementing Dijkstra Algorithm
- Distance of nearest cell having 1
- Bridge edge in a graph
- Topological sort
- Level of Nodes
- Find whether path exist
- Find the number of islands
- Detect cycle in an undirected graph
- Detect cycle in an directed graph
- Rearrange characters
- Nearly sorted
- Merge k Sorted Arrays
- Kth smallest element
- Kth largest element
- Kth largest element in a stream
- K Most occurring elements
- Heap Sort
- Preorder to Postorder
- Maximum of all subarrays of size k
- Circular tour
- Vertical Traversal of Binary Tree
- Top View of Binary Tree
- Smaller on Right
- Pair Sum in BST
- Floor in BST
- Find the Closest Element in BST
- Delete a node from BST
- Count BST nodes that lie in a given range
- Convert Level Order Traversal to BST
- Ceil in BST
- Bottom View of Binary Tree
- Tree from Postorder and Inorder
- Serialize and Deserialize a Binary Tree
- Node at distance
- Maximum sum of Non-adjacent nodes
- Maximum path sum from any node
- Maximum difference between node and its ancestor
- Foldable Binary Tree
- Count Number of SubTrees having given Sum
- Construct Binary Tree from Parent Array
- Make Binary Tree From Linked List
- Lowest Common Ancestor in a Binary Tree
- Check if subtree
- Binary Tree to CDLL
- The Celebrity Problem
- Maximum Rectangular Area in a Histogram
- Stock span problem
- Next Greater Element
- Merge Sort on Doubly Linked List
- Merge Sort for Linked List
- Merge K sorted linked lists
- LRU Cache
- Intersection Point in Y Shapped Linked Lists
- Given a linked list of 0s, 1s and 2s, sort it.
- Add two numbers represented by linked lists
- Swap Kth nodes from ends
- Rotate a Linked List
- Remove loop in Linked List
- Add two numbers represented by linked lists
- Split the binary string into substrings with equal number of 0s and 1s
- Permutations of a given string
- Next Permutation
- Longest Repeating Subsequence
- Longest Palindrome in a String
- Edit Distance
- Count the Reversals
- Smallest window in a string containing all the characters of another string
- Rabin Karp - Pattern Searching
- Lexicographic Rank Of A String
- Check if a String is Subsequence of Other
- Case-specific Sorting of Strings
- Kth Largest Element in an Array
- Zero Sum Subarrays
- Subarrays with equal 1s and 0s
- Sorting Elements of an Array by Frequency
- Sort an array according to the other
- Longest consecutive subsequence
- Spirally traversing a matrix
- Search in a row-column sorted Matrix
- Row with max 1s
- Median in a row-wise sorted Matrix
- Make Matrix Beautiful
- Kth element in Matrix
- Determinant of a Matrix
- Boolean Matrix
- Triplet Sum in Array
- Three way partitioning
- Minimum Platforms
- Merge three sorted arrays
- Count the number of possible triangles
- Count Inversions
- Closer to sort
- Quick Sort
- Count only Repeated
- Count More than n/k Occurences
- Maximum Water Between Two Buildings
- Square root of a number
- Peak element
- Majority Element
- Left Index
- Trapping Rain Water
- Stock buy and sell
- Smallest Positive missing number
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Maximum Index
- Longest Subarray Of Evens And Odds
- Kadane's Algorithm
- Check if array is sorted and rotated
- Tower Of Hanoi
- Possible Words From Phone Digits
- Maximum AND Value
- Count total set bits
- Boats to Save People
- Score of Parentheses
- Validate Stack Sequences
- Min Cost to Connect All Points
- Course Schedule
- Arithmetic Slices
- Circle and Rectangle Overlapping
- Remove Duplicates from Sorted Array II
- 4Sum II
- Concatenation of Consecutive Binary Numbers
- Design Add and Search Words Data Structure
- All Elements in Two Binary Search Trees
- Sequential Digits
- Stone Game IV
- Can Place Flowers
- Insert into a Binary Search Tree
- Sum of Root To Leaf Binary Numbers
- Robot Bounded In Circle
- Linked List Random Node
- Car Pooling
- Maximum Difference Between Node and Ancestor
- Smallest Integer Divisible by K
- K Closest Points to Origin
- Basic Calculator II
- Course Schedule II
- Reorder List
- Decode String
- Maximum Repeating Substring
- Insertion Sort List
- Range Sum of BST
- Word Break
- Jump Game III
- Minimum Number of Operations to Move All Balls to Each Box
- House Robber III
- Maximum Product Subarray
- Longest Consecutive Sequence
- Lexicographically Smallest String After Applying Operations
- Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold
- Bulls and Cows
- Delete Node in a BST
- Construct Binary Tree from Inorder and Postorder Traversal
- Single Element in a Sorted Array
- Total Hamming Distance
- Largest Divisible Subset
- Iterator for Combination
- Daily Temperatures
- String Compression
- Merge Intervals
- Count and Say
- Best Time to Buy and Sell Stock II
- 4Sum
- 3Sum Closest
- Number of Valid Words for Each Puzzle
- Unique Binary Search Trees
- Multiply Strings
- Single Number III
- Number of Longest Increasing Subsequence
- Longest Common Subsequence
- Delete Operation for Two Strings
- Sum Root to Leaf Numbers
- Integer Break
- Coin Change
- Longest Increasing Subsequence
- Minimum Operations to Convert Number
- Flatten a Multilevel Doubly Linked List
- Find the Minimum and Maximum Number of Nodes Between Critical Points
- Plates Between Candles
- Jump Game II
- Integer to Roman
- ZigZag Conversion
- Sort Colors
- Letter Combinations of a Phone Number
- Permutations II
- Path Sum II
- Next Permutation
- Combination Sum
- Combination Sum II
- Subsets
- Subsets II
- Surrounded Regions
- Shortest Path in Binary Matrix
- Next Greater Numerically Balanced Number
- Count Complete Tree Nodes
- Subarray Product Less Than K
- Sort Characters By Frequency
- Find All Anagrams in a String
- Insert Delete GetRandom O(1)
- Reverse Words in a String
- Interval List Intersections
- Container With Most Water
- Remove Duplicates from Sorted List II
- Hand of Straights
- Find Peak Element
- Cyclically Rotating a Grid
- Angle Between Hands of a Clock
- Simple Bank System
- Search in Rotated Sorted Array
- Search a 2D Matrix
- Path Sum III
- Find First and Last Position of Element in Sorted Array
- Count Number of Maximum Bitwise-OR Subsets
- String to Integer (atoi)
- Reverse Integer
- Remove Colored Pieces if Both Neighbors are the Same Color
- House Robber II
- Best Time to Buy and Sell Stock with Cooldown
- Unique Paths
- Unique Paths II
- Triangle
- Perfect Squares
- Minimum Path Sum
- House Robber
- Minimum Size Subarray Sum
- Letter Case Permutation
- Construct Binary Search Tree from Preorder Traversal
- Swap Nodes in Pairs
- Rotting Oranges
- Permutations
- Matchsticks to Square
- Combinations
- 01 Matrix
- Valid Pair Sum
- Robot Factory
- Populating Next Right Pointers in Each Node
- Permutation in String
- Bitwise AND of Numbers Range
- Number of Islands
- Max Area of Island
- Find All Groups of Farmland
- Count Sub Islands
- Add Two Numbers
- Add Two Numbers II
- Longest Substring Without Repeating Characters
- Implement Trie (Prefix Tree)
- Word Search
- Rotate List
- Remove Nth Node From End of List
- Find All Duplicates in an Array
- Rotate Array
- Find Minimum in Rotated Sorted Array
- Product of Array Except Self
- Merge Triplets to Form Target Triplet
- Sum of Beauty in the Array
- Jump Game
- Insert new interval in the given intervals