- Print Linked List elements
- Count nodes of linked list
- Node at a given index in linked list
- Delete node in Doubly Linked List
- Size of Binary Tree
- Inorder Traversal
- Count Leaves in Binary Tree
- Selection Sort
- Height of Binary Tree
- Finding middle element in a linked list
- Circular Linked List
- Postorder Traversal
- Implement Stack using Linked List
- Implement stack using array
- Implement Queue using Linked List
- Implement Queue using array
- Square root
- Doubly linked list Insertion
- Binary Search
- Add two fractions
- Replace all 0's with 5
- Count zeros in a sorted matrix
- Preorder Traversal
- Search a node in BST
- Implement Atoi
- Find Number of Numbers
- Find triplets with zero sum
- Linked List Insertion
- Minimum element in BST
- Circular Linked List Traversal
- Linked List Length Even or Odd?
- Delete Alternate Nodes
- Identical Linked Lists
- Find the Sum of Last N nodes of the Linked List
- Modular Node
- Find n/k th node in Linked list
- Maximum in Struct Array
- Queue Reversal
- Triplet Family
- Sum of Binary Tree
- Magical Number
- Insert in Middle of Linked List
- Count Non-Leaf Nodes in Tree
- Stack designer
- Queue Designer
- Strongest Neighbour
- Array insert at index
- Array insert at end
- Reversing an Array
- Absolute Value
- Convert Celsius To Fahrenheit
- Check whether K-th bit is set or not
- Count total set bits
- Bit Difference
- Number is sparse or not
- Gray Code
- Gray to Binary equivalent
- Power of 2
- Reverse array in groups
- Rotate Array
- Sum of Digits of a Number
- Power Using Recursion
- Fibonacci Using Recursion
- Search an Element in an array
- Binary String
- Consecutive elements
- Factorial
- Prime Number
- LCM And GCD
- GCD of Array
- Searching a number
- Power of 2
- Series GP
- 2's Complement
- Sort The Array
- Nth Fibonacci Number
- Print the Kth Digit
- Doubling the value
- Majority Element
- Sieve of Eratosthenes
- Shortest path from 1 to n
- Amend The Sentence
- Count possible triangles
- Dice throw
- Rotate Array
- Permutations of a given string
- Check if the number is Fibonacci
- Missing number in array
- Swap two nibbles in a byte
- Maximum product of two numbers
- Number of paths
- Find number of days between two given dates
- Count total set bits
- Number is sparse or not
- Bit Difference
- Count numbers containing 4
- Convert from any base to decimal
- Immediate Smaller Element
- Count zero
- Sum of distinct elements
- Binary Array Sorting
- Intersection of two arrays
- Union of two arrays
- Remove character
- Number of occurrence
- k largest elements
- Student record
- Pairs of prime number
- Minimum difference pair
- Check if a number is power of another number
- Find position of set bit
- Sum of all prime numbers between 1 and N.
- Pattern Jumping
- Sum of Digits Divisibility
- Maximum money
- Ways To Tile A Floor
- Generate Binary Numbers
- Smallest number
- Find the Odd Occurence
- Angle between hour and minute hand
- Keypad typing
- Check if given four points form a square
- Rotating an Array
- Searching an element in a sorted array
- Rotate by 90 degree
- Reverse array in groups
- Set Bits
- Professor and Parties
- Longest Consecutive 1's
- Count Squares
- Padovan Sequence
- Minimize the sum of product
- Check if a number can be expressed as x^y
- String with numbers at its end
- Replace the Bit
- Squares in a Matrix
- Find first and last occurrence of x
- Sum of dependencies in a graph
- Check if two arrays are equal or not
- Form largest number from digits
- Unique Numbers
- Find first set bit
- Minimize sum of alternate product
- Check if the door is open or closed
- Tidy Number
- Geek and Coffee Shop
- Index of first 1 in a sorted array of 0’s and 1’s
- Does array represent Heap
- Find the element that appears once in sorted array
- Thief trying to escape
- Last index of One
- Transpose of Matrix
- First element to occur k times
- Check whether K-th bit is set or not
- Extract Maximum
- Uncommon characters
- Find the smallest and second smallest element in an array
- Sorted matrix
- Pair cube count
- Swap and Maximize
- Rightmost different bit
- Check set bits
- Set kth bit
- Quick Left Rotation
- Twice counter
- Elements in the Range
- Print first n Fibonacci Numbers
- Count triplets with sum smaller than X
- Check perfect square
- Total number of Strings
- Check an Integer is power of 3 or not
- Change all even bits in a number to 0
- Closest Number
- Boolean String Value
- Remove common characters and concatenate
- Shortest un-ordered subarray
- Left Rotate Matrix K times
- Find k-th character in string
- Repeated Character
- Merge two strings
- Find the fine
- Three distinct factors
- Remove consonants from a string
- Message Spreading
- Inverse Permutation
- Ishaan's Internship
- Ishaan Loves Chocolates
- Factor OR Multiple
- Program for length of the longest word in a sentence
- Reducing Walls
- Find the Number which contain the digit d
- Maximum Perimeter of Triangle from array
- Doctors Clinic
- How Many X's?
- Height of Heap

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- Reverse a linked list
- Occurence of an integer in a Linked List
- Delete N nodes after M nodes of a linked list
- Rotate a Linked List
- Pairwise swap elements of a linked list
- Given a linked list of 0s, 1s and 2s, sort it.
- Add two numbers represented by linked lists
- Rearrange a linked list
- Add 1 to a number represented as linked list
- linked list of strings forms a palindrome
- Compare two linked lists
- Merge 2 sorted linked list in reverse order
- Linked List in Zig-Zag fashion
- Detect Loop in linked list
- Rearrange linked list in-place
- Remove duplicates from an unsorted linked list
- Sorted insert for circular linked list
- Split a Circular Linked List into two halves
- Reverse a Doubly Linked List
- Insertion Sort
- Merge Sort
- Quick Sort
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- Diameter of Binary Tree
- Check for Balanced Tree
- Heap Sort
- Nth node from end of linked list
- Left View of Binary Tree
- Delete Middle of Linked List
- Merge two sorted linked lists
- Sum Tree
- Decimal Equivalent of Binary Linked List
- Transform to Sum Tree
- Intersection of two sorted Linked lists
- Find Transition Point
- Queue using two Stacks
- Remove duplicate element from sorted Linked List
- Stack using two queues
- Level order traversal in spiral form
- Reverse Level Order Traversal
- DFS of Graph
- Reverse alternate levels of a perfect binary tree
- Insert a node in a BST
- BFS of graph
- Lowest Common Ancestor in a Binary Tree
- Determine if Two Trees are Identical
- Root to leaf path sum
- Print all nodes that don't have sibling
- Postorder traversal from given Inorder and Preorder traversals
- Absolute List Sorting
- Lowest Common Ancestor in a BST
- Implement two stacks in an array
- Run Length Encoding
- Largest subarray of 0's and 1's
- Level order traversal Line by Line
- Print BST elements in given range
- Largest subarray with 0 sum
- Minimum Depth of a Binary Tree
- Remove duplicates in small prime array
- Odd even level difference
- Binary Tree to BST
- K-Palindrome
- Find nth element of spiral matrix
- Unique rows in boolean matrix
- Remove every k'th node
- Leaf at same level
- Is Binary Tree Heap
- Subtraction in Linked List
- Match specific pattern
- Validate an IP Address
- Multiply two linked lists
- Distinct occurrences
- Josephus problem
- You and your books
- Expression Tree
- Points in Straight Line
- Maximum Difference
- Check if Linked List is Palindrome
- Max distance between same elements
- Print matrix in diagonal pattern
- Generate Grey Code Sequences
- Check whether BST contains Dead End
- Delete a Node in Single Linked List
- Kth largest element in BST
- Find duplicates in an array
- Minimum four sum subsequence
- Count distinct elements in every window
- Max Level Sum in Binary Tree
- Special Stack
- Root to leaf paths sum
- Three way partitioning
- Sort a stack
- Longest consecutive sequence in Binary tree
- Print Common Nodes in BST
- Level order traversal
- Peak element
- Inorder Successor in BST
- Delete nodes greater than k
- Index Of an Extra Element
- Merge Sort for Linked List
- Convert Ternary Expression to Binary Tree
- Union of Two Linked Lists
- Intersection of Two Linked Lists
- Insert in a Sorted List
- Split Singly Linked List Alternatingly
- Ancestors in Binary Tree
- Level of a Node in Binary Tree
- Sum of leaf nodes in BST
- Root to Leaf Paths
- Maximum path sum
- Counting Sort
- Max and min element in Binary Tree
- Perfect Binary Tree
- XOR Linked List
- Counting elements in two arrays
- Reverse a string using Stack
- Linked List that is Sorted Alternatingly
- XOR of a given range
- Full binary tree
- Modify Linked List-1
- Triplet with 0 sum in BST
- Symmetric Tree
- Construct Tree from Inorder & Preorder
- Construct BST from Postorder
- Merge Lists Alternatingly
- Arrange Consonants and Vowels
- Huffman Decoding-1
- Vertical sum
- Next Right Node
- Count Pairs whose sum is equal to X
- Insert in Sorted way in a Sorted DLL
- Check if Tree is Isomorphic
- Depth of node
- pth common ancestor in BST
- Predecessor and Successor
- Maximum Node Level
- Children Sum Parent
- Diagonal Sum In Binary Tree
- Find length of Loop
- Deletion and Reverse in Linked List
- Change of Key in BST
- Median of BST
- Normal BST to Balanced BST
- Leaf under budget
- Linked List Matrix
- Reverse First K elements of Queue
- Height of Spiral Tree
- Sum of Leaf Nodes
- Sum of Right Leaf Nodes
- Sum of Left Leaf Nodes
- Deletion in a Binary Tree
- Nodes at Odd Levels
- Closest Neighbor in BST
- Brothers From Different Roots
- Sum of the Longest Bloodline of a Tree
- Exchange the Leaf Nodes
- Kth Ancestor in a Tree
- Check if two Nodes are Cousins
- ZigZag Tree Traversal
- Sum of Leaf Nodes at Min Level
- Tilt of Binary Tree
- Move all zeros to the front of the linked list
- Delete middle element of a stack
- Vertical Width of a Binary Tree
- Rotate doubly Linked List
- Matrix Interchange
- Predict the Column
- Get min at pop
- Deque Implementations
- Min Heap implementation
- Max and Second Max
- Mother Vertex
- Find first set bit
- Rightmost different bit
- Factorial Of Number
- Digits In Factorial
- GP Term
- Primality Test
- Longest Consecutive 1's
- Exactly 3 Divisors
- Mean And Median
- Modular Multiplicative Inverse
- Swap all odd and even bits
- Maximum AND Value
- Minimum adjacent difference in a circular array
- Power Of Numbers
- Subarray with given sum
- Print adjacency list
- Winner of an election
- Reverse words in a given string
- Minimum indexed character
- Count Total Digits in a Number
- Digital Root
- Power Set Using Recursion
- Frequencies of Limited Range Array Elements
- Anagram
- Number of Unique Paths
- Wave Array
- Maximum Gap
- Print Pattern
- Rotation
- Search in a Rotated Array
- Rectangles in N*N Board
- Squares in N*N Chessboard
- Palindrome numbers
- Subarray with least average
- Magic Number
- Maximize Toys
- Trailing zeroes in factorial
- Non Repeating Character
- Minimum number of Coins
- Good Pairs
- First Repeating Element
- Reverse words in a given string
- Move all zeroes to end of array
- Activity Selection
- Remove “b” and “ac” from a given string
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Pairs with difference k
- Two numbers with sum closest to zero
- Maximum value in a bitonic array
- Next greater number set digits
- Finding Position
- Next sparse binary number
- Amount of Water
- Segregate even and odd nodes in a Linked List
- Element that appears once where every element occurs twice
- Longest Distinct characters in string
- Count distinct pairs with difference k
- Replace by X
- Is Square
- Column name from a given column number
- N meetings in one room
- Remove Duplicates
- Maximum sum increasing subsequence
- Array to BST
- Facing the sun
- Triangular Number
- Key Pair
- Add Binary Strings
- Product array puzzle
- Length Unsorted Subarray
- Reverse Bits
- Count Smaller elements
- Lucky Number
- Reach the Nth point
- Subarray with given sum
- Adjacents are not allowed
- Leaders in an array
- Swap all odd and even bits
- Max rope cutting
- Count number of hops
- Increment
- Count pairs with given sum
- Inorder Traversal and BST
- Save Knights
- Segregate 0s and 1s
- Copy Set Bits in Range
- Triplet Sum in Array
- Two Repeated Elements
- Three Great Candidates
- K closest elements
- Reach a given score
- Next in Series
- Overlapping rectangles
- Possible paths
- Minimum element in a sorted and rotated array
- Search in a matrix
- Number Of Open Doors
- Fibonacci Sum
- Day of the week
- Largest power of prime
- Number of 1's in smallest repunits
- Chinky and diamonds
- Shop in Candy Store
- Check If two Line segments Intersect
- Largest number possible
- Pick values
- Missing element of AP
- Count the Zeros
- 0 - 1 Knapsack Problem
- Longest Common Increasing Subsequence
- Maximum Number of 1s
- Pangram Checking
- Pangram Strings
- Find the number of sub-arrays having even sum
- Skip the work
- Valid Substring
- Count the Reversals
- Tom and Jerry
- Number of ways to find two numbers
- Cutted Segments
- Number that are not divisible
- Game of Death in a circle
- Power of Numbers
- Final Destination
- Arithmetic Number
- Perfect Numbers
- Raju and coins
- Largest number with given sum
- Permutation with Spaces
- Element appearing once
- Equilibrium point
- Floor in a Sorted Array
- Finding Profession
- Maximize Dot Product
- Flip Bits
- Letter Writer
- Missing number in matrix
- Finding the numbers
- Count Increasing Subsequences
- Prime Factors
- Least Prime Factor
- LCS with permutations
- Choose and Swap
- Min Number of Flips
- Lucas Number
- Pairs with specific difference
- Mr. Binary
- Circle and Lattice Points
- Largest Even Number
- Sum of elements between k1'th and k2'th smallest elements
- Min sum formed by digits
- Move all negative elements to end
- String Manipulation
- Chocolate Distribution Problem
- Binary Tree K level sum
- Exit Point in a Matrix
- Maximum Sum Bitonic Subsequence
- Knapsack with Duplicate Items
- Let's Play!!!
- Sum of k smallest elements in BST
- Find sum of divisors
- Smallest factorial number
- Flood fill Algorithm
- Save The Nation
- Decode the pattern
- Longest K unique characters substring
- Maximum no of 1's row
- Friends Pairing Problem
- Decode the string
- Max sum in sub-arrays
- Next Greater Even Number
- Gold Mine Problem
- Smallest subarray with sum greater than x
- Seeds of a number
- Game of XOR
- Find Nth root of M
- Find largest word in dictionary
- Sum of all substrings of a number
- Recaman’s sequence
- Minimum Operations
- Find all pairs with a given sum
- Shortest distance in infinite tree
- Largest zigzag sequence
- Meta Strings
- Temple Offerings
- Matrix Game - 1
- Race in Fooland
- Excel Sheet | Part - 2
- Geeky Year
- Find the string in grid
- Largest Fibonacci Subsequence
- Increasing Sub Sequence
- Longest Palindromic Subsequence
- Fractional Knapsack
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- Common elements
- Recursive sequence
- Rod Cutting
- Fill array with 1's
- Efficiently sorting numbers in range from 0 to n^2 - 1
- Transitive closure of a Graph
- Array Subset of another array
- Karatsuba Algorithm
- Count the paths
- First negative integer in every window of size k
- Four Elements
- Paths to reach origin
- Subarray with 0 sum
- Get Minimum Squares
- Nth catalan number
- Group Anagrams Together
- Find the closest prime number to a given number
- Sum equals to Sum
- Find Pair Given Difference
- Count the elements
- Second most repeated string in a sequence
- Count all possible paths from top left to bottom right
- Minimum Deletions
- Shortest Common Supersequence
- Sort the given array after applying the given equation
- Assign Mice Holes
- Happiest Triplet
- Find pairs with given relation
- Mr Modulo and Pairs
- Painting the Fence
- Rearrange a string
- Minimum Number in a sorted rotated array
- Sort by Absolute Difference
- Bird and maximum fruit gathering
- Number of Groups
- Primes sum
- Swapping pairs make sum equal
- Number and the Digit Sum
- Toppers Of Class
- Minimum insertions to sort an array
- Minimum number of deletions and insertions.
- Minimum number of deletions to make a sorted sequence
- Minimum steps to minimize n as per given condition
- Minimum number of deletions.
- Jumping Caterpillars
- Closest Strings
- Longest alternating subsequence
- Ways to sum to N
- Subset with sum divisible by m
- Count of strings that can be formed using a, b and c under given constraints
- Number of subsequences in a string divisible by n
- Find all distinct subset (or subsequence) sums
- Longest subsequence-1
- Sum of average of all subsets
- Maximum sum Problem
- Minimum indexed character
- Find number of times a string occurs as a subsequence
- Minimum Cost To Make Two Strings Identical
- High-effort vs. Low-effort
- Longest Repeating Subsequence
- Stickler Thief
- Bell Numbers
- Compute sum of digits in all numbers from 1 to n
- Total number of non-decreasing numbers with n digits
- Minimum Swaps for Bracket Balancing
- Primitive Typing
- Even Fibonacci Numbers Sum
- Smallest number by rearranging digits of a given number
- Kth LSB
- K-Ary Tree
- Boundary Elements of Matrix
- Count the triplets
- Chicks in a Zoo
- Special Numbers
- Sum of two large numbers
- Prime number of set bits
- Numbers containing 1, 2 and 3
- Incomplete Array
- Sum Indexes
- Count Primes In Range
- Find unit digit in a Product
- Next Happy Number
- Fact Digit Sum
- Non-Repeating Element
- Find if string is K-Palindrome or not
- Number of pairs with maximum sum
- Roof Top
- Pairs which are Divisible by 4
- Maximum distinct elements after removing K elements
- Maximum difference of zeros and ones in binary string
- Nearest multiple of 10
- Check if array contains contiguous integers with duplicates allowed
- Maximum height of the staircase
- Villain Con
- Amicable Pair
- Count ways to express N as the sum of 1,3 and 4
- Easy string
- Count pairs Sum in matrices
- C++ Matrix Rotation by 180 degree
- Swap every two bits in bytes
- Print Binary Tree levels in sorted order
- Check if a number is divisible by 8
- Hungry Pizza Lovers
- Find the closest pair from two arrays
- Maximum sum of increasing order elements from n arrays
- Longest substring with equal number of 0s and 1s
- Charul and vessels
- Print Bracket Number
- Check if it is possible to survive on Island
- Surround the 1's
- Searching in an array where adjacent differ by at most k
- Cutting Binary String
- Smallest number with sum of digits as N and divisible by 10^N
- Delete array elements which are smaller than next or become smaller
- Smallest greater elements in whole array
- Eulerian Path in an Undirected Graph
- Minimal moves to form a string
- Product of Prime Factors
- Save Ironman
- Print adjacency list

- Given a linked list, reverse alternate nodes and append at the end
- Reverse a Linked List in groups of given size.
- Delete nodes having greater value on right
- Quick Sort on Linked List
- Count BST nodes that lie in a given range
- Check for BST
- Tree from Postorder and Inorder
- Bottom View of Binary Tree
- Delete without head pointer
- Intersection Point in Y Shapped Linked Lists
- Add all greater values to every node in a BST
- Construct Binary Tree from Parent Array
- Connect Nodes at Same Level
- Clone a linked list with next and random pointer
- Flattening a Linked List
- Diagonal Traversal of Binary Tree
- Boundary Traversal of binary tree
- Delete a node from BST
- Detect cycle in a directed graph
- Detect cycle in an undirected graph
- Min distance between two given nodes of a Binary Tree
- Maximum difference between node and its ancestor
- The Celebrity Problem
- Topological sort
- Print a Binary Tree in Vertical Order
- Merge K sorted linked lists
- Find the number of islands
- Get minimum element from stack
- Serialize and Deserialize a Binary Tree
- Circular tour
- Max rectangle
- Make Binary Tree From Linked List
- Generate IP Addresses
- Check if subtree
- Extreme nodes in alternate order
- Kth element in Matrix
- Clone a Binary Tree
- Remove loop in Linked List
- Implementing Dijkstra | Set 1 (Adjacency Matrix)
- Max length chain
- Largest BST
- Interleaved Strings
- Sum of permutations
- LRU Cache
- Box Stacking
- Count Palindromic Subsequences
- Multiply two strings
- Minimum Swaps to Sort
- Strongly Connected Components (Kosaraju's Algo)
- Rat in a Maze Problem
- Bipartite Graph
- Max sum subarray by removing at most one element
- Number of root to leaf paths
- Find the Closest Element in BST
- Pots of Gold Game
- Delete keys in a Linked list
- Merge two BST 's
- Merge k Sorted Arrays
- Length of longest palindrome in linked list
- Print Nodes having K leaves
- Duplicate subtree in Binary Tree
- Top View of Binary Tree
- Smallest range in K lists
- k-th smallest element in BST
- Polynomial Addition
- Euler Circuit in a Directed Graph
- Euler circuit and Path
- Binary Tree to CDLL
- Find a pair with given target in BST
- Count More than n/k Occurences
- Occurences of 2 as a digit
- K-Sum Paths
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Node at distance
- Mirror of a given node
- Pairs violating BST property
- Maximum path sum from any node
- Leaves to DLL
- Largest Independent Set Problem
- Construct Tree from Preorder Traversal
- Convert Level Order Traversal to BST
- Count Number of SubTrees having given Sum
- Path Count in Directed Graph
- C++ Generic sort
- Swap Kth nodes from ends
- Smallest Positive missing number
- Possible Words From Phone Digits
- Stock buy and sell
- Kadane's Algorithm
- Unique BST's
- Distance of nearest cell having 1
- Unit Area of largest region of 1's
- Subarrays with equal 1s and 0s
- Sorting Elements of an Array by Frequency
- Case-specific Sorting of Strings
- M-Coloring Problem
- Count ways to N'th Stair(Order does not matter)
- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Sum Of Prime
- Excel Sheet | Part - 1
- Print Diagonally
- Overlapping Intervals
- Maximum Index
- Equal Sum
- Next Permutation
- Longest Increasing Subsequence
- Parenthesis Checker
- Longest Common Subsequence
- Minimum number of jumps
- Count ways to reach the n'th stair
- Count ways to N'th Stair(Order does not matter)
- Egg Dropping Puzzle
- Count of n digit numbers whose sum of digits equals to given sum
- Edit Distance
- Magic Triplets
- nCr
- Maximum Rectangular Area in a Histogram
- Min Coin
- Consecutive 1's not allowed
- Count of Subarrays
- Path in Matrix
- Trapping Rain Water
- Case-specific Sorting of Strings
- Sum of bit differences
- Subset Sum Problem
- Maximize The Array
- Number of Coins
- Minimum Platforms
- Find Prime numbers in a range
- Stock buy and sell
- Largest Number formed from an Array
- Jumping Numbers
- Longest Palindrome in a String
- Modular Exponentiation for large numbers
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Relative Sorting
- Black and White
- Maximum of all subarrays of size k
- Largest square formed in a matrix
- Row with max 1s
- Boolean Matrix Problem
- Sorting Elements of an Array by Frequency
- Design a tiny URL or URL shortener
- Nuts and Bolts Problem
- Rotate a 2D array without using extra space
- Special Keyboard
- Number of ways
- Minimum Cost of ropes
- Sum of Query II
- Form a palindrome
- Inversion of array
- Preorder to Postorder
- Length of the longest substring
- Smallest number on left
- Longest consecutive subsequence
- Largest subsquare surrounded by ‘X’
- Maximum Sum Path in Two Arrays
- Stock span problem
- Convert an array to reduced form
- M-Coloring Problem
- Minimum steps to get desired array
- Dimensions of Rectangle
- Handshakes
- Palindromic Array
- Is Binary Number Multiple of 3
- Maximum Sum Subsequence of length k
- Preorder Traversal and BST
- Card Rotation
- Longest Arithmetic Progression
- Jumbled Strings
- Palindromic Strings
- Max possible amount
- Bleak Numbers
- Super Primes
- Number of pairs
- Product of Primes
- Coin Piles
- Maximum Profit
- Circle of strings
- Nodes at even distance
- Queries on Strings
- Largest number in K swaps
- Special Matrix
- Minimize the heights
- Next larger element
- Composite and Prime
- Taking 1 out of 3 consecutives
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Distinct Transformations
- Subsets
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Kth smallest element
- Divisible by 8
- Maximum calorie
- Prime Factors and their Powers
- Longest Common Substring
- Count Palindrome Sub-Strings of a String
- Negative weight cycle
- Hamiltonian Path
- Count the Number of Full Binary Trees
- Snake and Ladder Problem
- Recursively remove all adjacent duplicates
- Shortest Source to Destination Path
- Divisibility tree
- Number of Palindromic paths in a Matrix
- Replace O's with X's
- Knight Walk
- Find all four sum numbers
- Word Boggle
- Form coils in a matrix
- Max absolute difference
- Print leaf nodes from preorder traversal of BST
- Distance of nearest cell having 1
- Is Sudoku Valid
- Find whether path exist
- Largest prime factor
- Check Mirror in N-ary tree
- Unit Area of largest region of 1's
- Rearrange characters
- Express as sum of power of natural numbers
- First non-repeating character in a stream
- Count subsequences of type a^i b^j c^k
- Convex Hull
- Matrix Exponentiation
- K
^{th}largest element in a stream - Water Overflow
- Zero Sum Subarrays
- Magnet Array Problem
- Smallest distinct window
- Minimum number of steps to reach a given number.
- Floyd Warshall
- Huffman Encoding
- Nearly Sorted Algorithm
- Infix to Postfix
- Optimal binary search tree
- Largest Sum Subarray of Size at least K
- Longest Bitonic subsequence
- Mobile numeric keypad
- Reverse Spiral Form of Matrix
- Pyramid form
- Maximum sum Rectangle
- Maximum Intervals Overlap
- Minimum Time
- Perfect Sum Problem
- Array Pair Sum Divisibility Problem
- First Digit
- Count possible ways to construct buildings
- Rotten Oranges
- Modify array to maximize sum of adjacent differences
- Probability of Knight
- LCS of three strings
- Longest repeating and non-overlapping substring
- Minimum cost to fill given weight in a bag
- Count even length
- Median In a Row-Wise sorted Matrix
- Mail System Design
- Row with minimum number of 1's
- Count of sum of consecutives
- Brackets in Matrix Chain Multiplication
- Matrix Chain Multiplication
- Nine Divisors
- Maximum Tip Calculator
- Maximum GCD Pair
- Pizza Mania
- Fill the Tank
- Make Matrix Beautiful
- Marks of PCM
- String Conversion
- Buying Vegetables
- The Painter's Partition Problem
- Maximize the sum of selected numbers from an array to make it empty
- Construct binary palindrome by repeated appending and trimming
- Castle RUN
- Possible paths between 2 vertices
- Optimal Strategy For A Game

- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- Maximum subset XOR
- Alien Dictionary
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST
- Number of Turns in Binary Tree
- Minimum Points To Reach Destination
- Minimum sum partition
- Maximum of minimum for every window size
- Merge Without Extra Space
- Find sum of different corresponding bits for all pairs
- Return two prime numbers
- Allocate minimum number of pages
- A Simple Fraction
- Ugly Numbers
- Longest valid Parentheses
- Word Break - Part 2
- Minimum Cost Path
- N-Queen Problem
- Solve the Sudoku
- Find median in a stream
- Max Circular Subarray Sum
- Distinct palindromic substrings
- Convert to Strictly increasing array
- Count the subarrays having product less than k
- Closest Palindrome
- Median of Two sorted arrays