- Check for Binary
- Replace all 0's with 5
- Palindromic Array
- Print alternate elements of an array
- Java Inheritance
- Sum of array elements
- Reverse an Array
- Maximum and Minimum Of Array Elements
- Pascal Triangle
- Alone in couple
- Sum of Array
- Odd or Even
- Palindrome String
- Armstrong Numbers
- Greatest of three numbers
- Swap two numbers
- Sum of Series
- Series AP
- Print Elements of Array
- Area of Rectange, Right Angled Triangle and Circle
- Binary number to decimal number
- Print table
- Simple Interest
- Surface Area and Volume of Cuboid
- Automorphic Number
- Sum of an AP
- Sum of GP
- nPr
- Count Alphabets
- Fascinating Number
- Remove characters from alphanumeric string
- Pattern Printing
- Remove Spaces
- Value equal to index value
- Check if a number is Perfect Square
- Swap kth elements
- Second Largest
- Smaller and Larger
- Average
- Binary representation
- Check if an array is sorted
- Pattern of Strings
- Triangle shrinking downwards
- Palindrome
- Remainder Evaluation
- 12 hour clock addition
- 12 hour clock subtraction
- 12 hour clock Multiplication
- Lower case to upper case
- Cube root of a number
- Parallel or Perpendicular?
- Find the median
- Mean
- Number of divisors
- Perfect Number
- Multiples Power
- Multiply Array
- Diagonal sum
- Combinational Logic
- At least two greater elements
- Compete the skills
- Count of camel case characters
- Print the left element
- Reversing the vowels
- Display longest name
- Reverse a String
- GCD of two numbers
- Largest Element in Array
- Java Arrays | Set 1
- Count of smaller elements
- Find Index
- Count type of Characters
- Number of Diagonals
- Perfect Arrays
- The dice problem

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Rachana

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Overall Coding Score: 2287

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- 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
- 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
- Square root
- Doubly linked list Insertion
- Print all possible strings
- Replace all 0's with 5
- Count zeros in a sorted matrix
- Largest product
- Third largest element
- Convert to Roman No
- Preorder Traversal
- Implement strstr
- Search a node in BST
- Equal Sum and XOR
- Remainder with 7
- Implement Atoi
- Find Number of Numbers
- Minimum distance between two numbers
- Find triplets with zero sum
- Linked List Insertion
- Play with an array
- Minimum element in BST
- Anagram of String
- 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
- Sum of Binary Tree
- longest substring containing '1'
- Pairwise Consecutive Elements
- Count Non-Leaf Nodes in Tree
- Mrs. S- JAVA Bits Set 1
- Product of array elements
- Sum Array Puzzle
- Check if a string is Isogram or not
- Binary String
- Search an Element in an array
- Maximum Occuring Character
- Binary String
- Consecutive elements
- Factorial
- Prime Number
- LCM And GCD
- Repetitive Addition Of Digits
- Searching a number
- Power of 2
- Series GP
- 2's Complement
- Sort The Array
- Celsius to Fahrenheit Conversion
- Pythagorean Triplet
- Nth Fibonacci Number
- Sort a String
- Strong Number
- Print the Kth Digit
- Doubling the value
- Majority Element
- Shortest path from 1 to n
- Amend The Sentence
- Count possible triangles
- Dice throw
- Rotate Array
- Permutations of a given string
- Parity of unsigned integer
- Check if the number is Fibonacci
- Missing number in array
- Rock Paper Scissors!
- Array of alternate +ve and -ve no.s
- Swap two nibbles in a byte
- Maximum product of two numbers
- Number of paths
- Segregate Even and Odd numbers
- Count total set bits
- Number is sparse or not
- Bit Difference
- Convert from any base to decimal
- Reverse sub array
- Odd Divisors
- Greater on right side
- Immediate Smaller Element
- Count zero
- Perfect Squares in a Range
- Sum of distinct elements
- Binary Array Sorting
- Intersection of two arrays
- Union of two arrays
- Convert array into Zig-Zag fashion
- Remove character
- Number of occurrence
- Maximum repeating number
- k largest elements
- Student record
- Pairs of prime number
- Minimum difference pair
- Roots of Quadratic Equation
- Check if a number is power of another number
- Remove recurring digits
- Triangle growing downwards
- Find position of set bit
- Sum of all prime numbers between 1 and N.
- Jumping Geek
- Sum of Digits Divisibility
- Maximum money
- Palindromic Subsequences
- Ways To Tile A Floor
- Absolute distinct count
- Generate Binary Numbers
- Shortest direction
- Count the numbers
- Find the Odd Occurence
- Keypad typing
- Check if given four points form a square
- Maximum Possible Sum of Products
- Rotating an Array
- Total distance travelled in an array
- Sum of Products
- Number of Integer solutions
- Extraction of secret message
- Even occurring elements
- Missing ranges of numbers
- Searching an element in a sorted array
- Total count
- Compare two Large Numbers
- Surpasser Count
- The Lazy Caterer's Problem
- Matching Pair
- Merge and Sort
- Minimize string value
- Composite Series
- Rotate by 90 degree
- Rearranging array
- Reverse array in groups
- The AND Gate
- The OR Gate
- Multiple in Table Tennis
- 1's Complement
- The XOR Gate
- Good String
- Mega Sale
- Set Bits
- Repeated sum of digits
- Professor and Parties
- Longest Consecutive 1's
- Sum of divisors
- Common Divisors
- Count Squares
- Square Divisors
- Perfect Reversible String
- Max-Min conversion
- Juggler Sequence
- No of Carry Operations
- Unusual String Sort
- Elements before which no element is bigger
- Minimize the sum of product
- Missing number
- Find Substring from last of the Given String
- Make a Distinct Digit Array
- Reverse each word in a given string
- Check if a number can be expressed as x^y
- Permutations in array
- String with numbers at its end
- Encrypt the string - 1
- Replace the Bit
- Sum of product of x and y with floor(n/x) = y
- Largest subarray with GCD one
- Squares in a Matrix
- King's War
- Find duplicates under given constraints
- Find first and last occurrence of x
- Type of array
- Ladoo problem
- Sum of dependencies in a graph
- Stuffs Division
- Sort in specific order
- Check if two arrays are equal or not
- Form largest number from digits
- Sherlock a Detective
- Check if string is rotated by two places
- Invert the Bits
- Check if divisible by 11
- Unique Numbers
- XOR of all elements
- Check if divisible by 4
- Learning Output
- Substrings with similar first and last characters
- Rahul lucky-unlucky
- Find first set bit
- Minimize sum of alternate product
- Check for subsequence
- Check if the door is open or closed
- Find first repeated character
- Sort the fest
- Count even substrings
- Message decoding
- Geek and Coffee Shop
- A guy with a mental problem
- Fake Profile
- Wrong Ball
- The Muskteers
- Index of first 1 in a sorted array of 0’s and 1’s
- Split the string
- Does array represent Heap
- Missing number in shuffled array
- Find the element that appears once in sorted array
- Thief trying to escape
- Last index of One
- Arranging the array
- Cyclically rotate an array by one
- Sum Triangle for given array
- Print an array in Pendulum Arrangement
- First element to occur k times
- Check whether K-th bit is set or not
- Length of Last word
- Extract Maximum
- Remove Duplicates from unsorted array
- Uncommon characters
- Minimum sum of two elements from two arrays
- Sum of numbers in string
- Find the smallest and second smallest element in an array
- Find minimum and maximum element in an array
- Find second largest element
- URLify a given string
- Print first letter of every word in the string
- Rotate Bits
- Wildcard string matching
- Sorted matrix
- Minimum move to front operations
- Sum Terms Nth Row
- Smallest power of 2 greater than or equal to n
- Balance with respect to an array
- Pair array product sum
- Pair cube count
- Count pair sum
- First Come First Serve
- Friendly Array
- Balanced Array
- Max Odd Sum
- Swap and Maximize
- Minimum Difference among K
- Longest Equal Prefix
- Check Arithmetic Progression
- Sort the Half Sorted
- Partition Point in the Array
- Fibonacci in the array
- Alternative Sorting
- Rightmost different bit
- Max value after m range operation
- Check set bits
- Set kth bit
- Fighting the darkness
- Sorting Employees
- Count Pairs Odd Xor
- Quick Left Rotation
- Difficulty of sentence
- Toggle bits given range
- Stable Sort and Position
- Twice counter
- Shuffle integers
- Elements in the Range
- Distinct Adjacent Element
- First K natural numbers
- Remove repeated digits in a given number
- Sum of distinct elements for a limited range
- Count triplets with sum smaller than X
- Total number of Strings
- Find the Highest number
- Minimum number to form the sum even
- Anagram Palindrome
- Closest Number
- Transform to prime
- First and last occurrences of X
- Positive and negative elements
- Boolean String Value
- Equalization of an array
- Smallest number repeating K times
- Rearrange the array
- Part Sort
- Ceil The Floor
- Sort first half in ascending and second half in descending
- Maximum weight difference
- Tough Competitors
- Anshuman's Favourite Number
- The Counting Game !!
- XOR Count Zero and One
- Absolute Difference of 1
- Remove common characters and concatenate
- Powers game
- Longest increasing subarray
- Repeated I.Ds
- Left Rotate Matrix K times
- Count the characters
- Find k-th character in string
- Good or Bad string
- Difference between highest and lowest occurrence
- Minimum product pair
- Find unique element
- Find the fine
- Maximize ∑arr[i]*i of an Array
- The Cycle Game
- Count number of elements between two given elements in array
- Perfect Array
- Find the closest number
- Sandwiched_Vowels
- Finding-Pairs
- Series X1
- Distinct Elements in a Stream
- Make Co-prime Array
- Special Series Sum
- Special Odd Series Sum
- The problem of identical arrays
- Tiger Zinda Hai
- Product of maximum in first array and minimum in second
- Most frequent word in an array of strings
- Check if strings are rotations of each other or not
- Message Spreading
- Making elements distinct
- Countries at war
- Last duplicate element in a sorted array
- Sum of f(a[i], a[j]) over all pairs in an array of n integers
- Inverse Permutation
- Game with nos
- Play With OR
- Why is Melody so chocolaty?
- Tywin's War Strategy
- Ishaan Loves Chocolates
- Factor OR Multiple
- Jay's Apples
- Difference series
- Reducing Walls
- Multiply left and right array sum.
- Maximum Perimeter of Triangle from array
- Doctors Clinic
- How Many X's?
- Height of Heap
- Average Count Array
- Java 1-d and 2-d Array

- 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
- Remove duplicates from an unsorted linked list
- Sorted insert for circular linked list
- Reverse a Doubly Linked List
- 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
- 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
- Max sum path in two arrays
- 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
- Max sum in the configuration
- Equilibrium index of an array
- Unique rows in boolean matrix
- Remove every k'th node
- Leaf at same level
- Is Binary Tree Heap
- Match specific pattern
- Validate an IP Address
- Multiply two linked lists
- Distinct occurrences
- Sorted subsequence of size 3
- Josephus problem
- Expression Tree
- 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
- Multiply two polynomials II
- 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
- String Modification
- 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
- Max and min element in Binary Tree
- Perfect Binary Tree
- 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
- Merge Lists Alternatingly
- Arrange Consonants and Vowels
- Huffman Decoding
- Vertical sum
- Next Right Node
- Count Pairs whose sum is equal to X
- 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
- Remove Half Nodes
- Height of Spiral Tree
- Sum of Leaf Nodes
- Sum of Right Leaf Nodes
- Sum of Left Leaf Nodes
- 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
- Vertical Width of a Binary Tree
- Rotate doubly Linked List
- Java Collections | Set 7 (LinkedList)
- Start Coding - Java
- The New Line - Java
- Bitwise Operators - Java
- Even Odd - Java
- Need Some Change
- Count Odd Even - Java
- Matrix Interchange - Java
- Xoring and Clearing - Java
- Pair in Java
- Maximum Area Rectangle
- Sum of Big Integers
- BigInteger Multiply
- ArrayList Operation
- Operations on ArrayList
- Stack Operations
- Queue Operations
- Frequency Game
- Pair Sum Existence
- Pair Sum Existence- Revisited
- Dictionary Usage - Java
- Dictionary Usage 2 - Java
- Pairwise swap of nodes in LinkeList
- Mother Vertex
- Print adjacency list
- Winner of an election
- Reverse words in a given string
- Smallest window in a string containing all the characters of another string
- Minimum indexed character
- Frequencies of Limited Range Array Elements
- Anagram
- Adding One
- Number of Unique Paths
- Wave Array
- Maximum Gap
- Pattern Searching
- Print Pattern
- Rotation
- Search in a Rotated Array
- Squares in N*N Chessboard
- Palindrome numbers
- Magic Number
- Maximize Toys
- Large Factorial
- Maximize Number of 1's
- Non Repeating Character
- Minimum number of Coins
- Distinct Substrings
- Sum of Middle Elements of two sorted arrays
- Good Pairs
- First Repeating Element
- Count Occurences of Anagrams
- Reverse words in a given string
- Isomorphic Strings
- Count Substrings
- Check if a given string is a rotation of a palindrome
- Move all zeroes to end of array
- Remove all duplicates from a given string
- Remove “b” and “ac” from a given string
- Equal Sum and Product
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Pairs with difference k
- Two numbers with sum closest to zero
- Finding Number
- Maximum value in a bitonic array
- Next greater number set digits
- Finding Position
- Next sparse binary number
- Amount of Water
- Single Number
- Segregate even and odd nodes in a Linked List
- Does robot moves circular
- Count increasing Subarrays
- 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
- Maximum Product Subarray
- N meetings in one room
- Remove Duplicates
- Kth distance
- Addition of submatrix
- Maximum sum increasing subsequence
- Array to BST
- Facing the sun
- Triangular Number
- Max Sum without Adjacents
- Key Pair
- Maximum Difference
- Add Binary Strings
- Product array puzzle
- Multiply two polynomals
- Reverse Bits
- Count Smaller elements
- Lucky Number
- Reach the Nth point
- Subarray with given sum
- Leaders in an array
- Swap all odd and even bits
- Overlapping Substrings
- Count number of hops
- Equal to product
- Count pairs with given sum
- Inorder Traversal and BST
- Save Knights
- Where Am I ?
- AND operation
- Segregate 0s and 1s
- Copy Set Bits in Range
- Triplet Sum in Array
- Two Repeated Elements
- Three Great Candidates
- Reach a given score
- Possible paths
- Minimum element in a sorted and rotated array
- Search in a matrix
- Number Of Open Doors
- Number of 1's in smallest repunits
- Chinky and diamonds
- K-Pangrams
- Generate binary string
- Missing element of AP
- Count the Zeros
- Distinct absolute array elements
- 0 - 1 Knapsack Problem
- Pangram Checking
- Pangram Strings
- Trail of ones
- Skip the work
- Valid Substring
- Count the Reversals
- Tom and Jerry
- Right most non zero digit
- Last Match
- Special array reversal
- Extract the Number from the String
- Number of ways to find two numbers
- Cutted Segments
- Maximum average subarray
- Final Destination
- Permutation divisibility
- Arithmetic Number
- Left out candies
- Ordering of strings
- Change Bits
- Permutation with Spaces
- Element appearing once
- Equilibrium point
- Floor in a Sorted Array
- Buildings receiving sunlight
- RegEx matching
- Max value
- Finding the numbers
- Minimum Energy
- Prime Factors
- Least Prime Factor
- Collecting Trees
- Maximize sum after K negations
- LCS with permutations
- Game of cells
- Adding Ones
- Min Number of Flips
- Pairs with specific difference
- Equal Point in Sorted Array
- Circle and Lattice Points
- Count Pairs in an Array
- Sum of elements between k1'th and k2'th smallest elements
- Min sum formed by digits
- Move all negative elements to end
- String Manipulation
- Help Nobita
- Chocolate Distribution Problem
- Maximum Sum Bitonic Subsequence
- 1[0]1 Pattern Count
- Let's Play!!!
- Sum of k smallest elements in BST
- Reverse Coding
- Flood fill Algorithm
- Tom and String
- Pair with greatest product in array
- Encrypt the string - 2
- Decode the pattern
- Longest K unique characters substring
- Roman Number to Integer
- Maximum no of 1's row
- Drive the car
- Max sum in sub-arrays
- Smallest subarray with sum greater than x
- Game of XOR
- Find Nth root of M
- Find largest word in dictionary
- Love For The Twins
- Sum of all substrings of a number
- Minimum Operations
- Equal point in a string of brackets
- Find all pairs with a given sum
- Shortest distance in infinite tree
- Palindromic patitioning
- Meta Strings
- Numbers with same first and last digit
- Check if palindromic ignoring spaces
- Jon and string
- Excel Sheet | Part - 2
- Find the string in grid
- Largest Fibonacci Subsequence
- Increasing Sub Sequence
- Longest Palindromic Subsequence
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- Maximum difference Indexes
- Common elements
- Rod Cutting
- Fill array with 1's
- Element with left side smaller and right side greater
- Transitive closure of a Graph
- Divisible by 5 or not-1
- Count the paths
- First negative integer in every window of size k
- Sum of product of all pairs
- Game with String
- Four Elements
- Find the highest occurring digit in prime numbers in a range
- Paths to reach origin
- Maximum Sum LCM
- Subarray with 0 sum
- Faulty wiring and Bulbs
- Get Minimum Squares
- Nth catalan number
- Group Anagrams Together
- Sum equals to Sum
- Find Pair Given Difference
- Carry counter
- 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
- Large number division
- Mr Modulo and Pairs
- Euler Totient Function
- Maximum occured integer
- Number of Groups
- Swapping pairs make sum equal
- Toppers Of Class
- Decode It
- String Ignorance
- Maximum product
- Jumping Caterpillars
- Closest Strings
- Replace a word
- Bitonic Generator Sort
- Count of strings that can be formed using a, b and c under given constraints
- Nth item through sum
- Maximum sum Problem
- String comparison
- Minimum indexed character
- Longest Repeating Subsequence
- Stickler Thief
- Even and odd elements at even and odd positions
- Compute (a*b)%c
- Maximum number of zeroes
- Merging two unsorted arrays in sorted order
- Sum of Lengths of Non-Overlapping SubArrays
- Generate all palindromic numbers less than n
- Chocolate Station
- Common Subsequence
- K-Ary Tree
- Count the triplets
- Star elements
- Sum of two large numbers
- Required Rooms
- Prime number of set bits
- Pairs with Positive Negative values
- Find Unique pair in an array with pairs of numbers
- Pairs with Difference less than K
- Find k-th missing element
- Equal Sums
- Next Happy Number
- Non-Repeating Element
- Find if string is K-Palindrome or not
- Pairs which are Divisible by 4
- Trisha's Number
- Find winner of the Game of Nim
- Maximum distinct elements after removing K elements
- Arya and The Great War
- Mystic Falls School
- Nearest multiple of 10
- Word with maximum frequency
- Form a number divisible by 3 using array digits
- Check if array contains contiguous integers with duplicates allowed
- Rearrange an array such that arr[i] = i
- Winner of an election
- Rope Cutting
- Ease the Array
- Amicable Pair
- Pair the minimum
- Counts Zeros Xor Pairs
- Print Binary Tree levels in sorted order
- Find the closest pair from two arrays
- The Inverting Factor
- Summing the Sum
- Print all bitwise subsets of a number N
- Longest substring with equal number of 0s and 1s
- Possible Timings
- Holi Balloons
- Print Bracket Number
- The Even Array
- Palindromic Series
- The Optimal Selection
- Minimum changes to make all substrings distinct
- Help Ishaan
- Sorting all array elements except one
- Smallest number with sum of digits as N and divisible by 10^N
- Reaching the heights
- Lucky Ishaan
- Smallest greater elements in whole array
- Eulerian Path in an Undirected Graph
- Ordered Prime Signature
- Save Ironman
- Penalty Shooters
- Fitting The Array
- Are you "Perfect"
- K-th missing element
- Print adjacency list
- Pair with given sum in a sorted array

- 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
- 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
- Wildcard Pattern Matching
- Max rectangle
- Make Binary Tree From Linked List
- 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
- Minimum Spanning Tree
- Largest BST
- Interleaved Strings
- Box Stacking
- Multiply two strings
- Minimum Swaps to Sort
- Strongly Connected Components (Kosaraju's Algo)
- Rat in a Maze Problem
- Bipartite Graph
- 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
- Bridge Edge in Graph
- Print Nodes having K leaves
- k-th smallest element in BST
- Polynomial Addition
- Merge Sort on Doubly Linked List
- Binary Tree to CDLL
- Find a pair with given target in BST
- Occurences of 2 as a digit
- K-Sum Paths
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Mirror of a given node
- Pairs violating BST property
- Maximum path sum from any node
- Leaves to DLL
- Largest Independent Set Problem
- Duplicate Subtrees
- Construct Tree from Preorder Traversal
- Convert Level Order Traversal to BST
- Count Number of SubTrees having given Sum
- Path Count in Directed Graph
- Operations on PriorityQueue
- Swap Kth nodes from ends
- Smallest Positive missing number
- Trapping Rain Water
- Unique BST's
- Unit Area of largest region of 1's
- Sorting Elements of an Array by Frequency
- Longest consecutive subsequence
- Count ways to N'th Stair(Order does not matter)
- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Excel Sheet | Part - 1
- Maximum Sub Array
- Print Diagonally
- Overlapping Intervals
- Maximum Index
- 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
- Edit Distance
- Consecutive 1's not allowed
- Count of Subarrays
- Longest Even Length Substring
- Path in Matrix
- Trapping Rain Water
- String formation from substring
- Case-specific Sorting of Strings
- Rank of Matrix
- Sum of bit differences
- Subset Sum Problem
- Maximize The Array
- Factorials of large numbers
- Minimum Platforms
- Number following a pattern
- Find Prime numbers in a range
- Stock buy and sell
- Largest Number formed from an Array
- Possible words from Phone digits
- Jumping Numbers
- Longest Palindrome in a String
- Modular Exponentiation for large numbers
- Rearrange Array Alternately
- 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
- Design a tiny URL or URL shortener
- Nuts and Bolts Problem
- Rotate a 2D array without using extra space
- 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
- Stock span problem
- Convert an array to reduced form
- Minimum steps to get desired array
- Subsequence matching
- Handshakes
- Tic-Tac-Toe
- Palindromic Array
- Betting game
- Is Binary Number Multiple of 3
- Possible groups
- Card Rotation
- Search Pattern
- Max possible amount
- Cost of Sweets
- Bleak Numbers
- Smallest Sub-Array
- Maximum Profit
- Minimum sum
- Circle of strings
- Nodes at even distance
- Build the smallest
- Your Social Network
- Largest number in K swaps
- Special Matrix
- Minimize the heights
- Next larger element
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Subsets
- Matchsticks game
- Combination Sum - Part 2
- Word Break
- Longest Prefix Suffix
- Kth smallest element
- Longest Common Substring
- Easy Query
- Count Palindrome Sub-Strings of a String
- Find patterns
- Rotate and delete
- Negative weight cycle
- Snake and Ladder Problem
- Recursively remove all adjacent duplicates
- Shortest Source to Destination Path
- Number of Palindromic paths in a Matrix
- Trie | (Insert and Search)
- Knight Walk
- Word Boggle
- Is Sudoku Valid
- Find whether path exist
- Check Mirror in N-ary tree
- Unit Area of largest region of 1's
- Rearrange characters
- First non-repeating character in a stream
- Count subsequences of type a^i b^j c^k
- Stepping Numbers
- K
^{th}largest element in a stream - Water Overflow
- Zero Sum Subarrays
- Smallest window in a string containing all the characters of another string
- Smallest distinct window
- Floyd Warshall
- Huffman Encoding
- Nearly Sorted Algorithm
- Infix to Postfix
- Smallest Positive missing number
- Longest Bitonic subsequence
- Reverse Spiral Form of Matrix
- Maximum sum Rectangle
- Maximum Intervals Overlap
- Array Pair Sum Divisibility Problem
- Top k numbers in a stream
- Image Multiplication
- Rotten Oranges
- LCS of three strings
- CamelCase Pattern Matching
- Longest Common Prefix in an Array
- Steps by Knight
- In First But Second
- Row with minimum number of 1's
- Numbers with alternative 1's
- Coins and Game
- Maximum Tip Calculator
- Alternate Vowel and Consonant String
- Biconnected Graph
- Longest Sub-Array with Sum K
- Sick Pasha
- The Tiny Miny
- Container with most water
- The Painter's Partition Problem
- Maximize the sum of selected numbers from an array to make it empty
- Lucky alive person in a circle
- Castle RUN
- Possible paths between 2 vertices
- Optimal Strategy For A Game

- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST
- Solve the Sudoku
- Minimum sum partition
- Maximum of minimum for every window size
- Head to Tail ordering
- Merge Without Extra Space
- Return two prime numbers
- Ugly Numbers
- Path of greater than equal to k length
- Longest valid Parentheses
- Solve the Sudoku
- Find median in a stream
- Distinct palindromic substrings
- Phone directory
- Doctor Strange