- Search an Element in an array
- Maximum Occuring Character
- Binary String
- Consecutive elements
- Factorial
- LCM And GCD
- GCD of Array
- Searching a number
- Power of 2
- Series GP
- Pythagorean Triplet
- Nth Fibonacci Number
- Sort a String
- Majority Element
- Sieve of Eratosthenes
- Shortest path from 1 to n
- Amend The Sentence
- Rotate Array
- Permutations of a given string
- 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
- Count total set bits
- Bit Difference
- Count numbers containing 4
- Greater on right side
- Immediate Smaller Element
- Binary Array Sorting
- Convert array into Zig-Zag fashion
- Remove character
- k largest elements
- Remove recurring digits
- Triangle growing downwards
- Find position of set bit
- Sum of all prime numbers between 1 and N.
- Palindromic Subsequences
- Generate Binary Numbers
- Shortest direction
- Smallest number
- Angle between hour and minute hand
- Keypad typing
- Rotating an Array
- Extraction of secret message
- Help the Old Man!!!
- Total count
- Compare two Large Numbers
- Merge and Sort
- Minimize string value
- Rotate by 90 degree
- Reverse array in groups
- Good String
- Set Bits
- Subset Sums
- Perfect Reversible String
- Max-Min conversion
- Count Sorted Rows
- Padovan Sequence
- No of Carry Operations
- Unusual String Sort
- Minimize the sum of product
- Missing number
- Find Substring from last of the Given String
- Make a Distinct Digit Array
- String Reversal
- Reverse each word in a given string
- Demonitisation
- Permutations in array
- String with numbers at its end
- Starting Point
- Help a Thief!!!
- Encrypt the string - 1
- Replace the Bit
- Form a Triangle
- Largest subarray with GCD one
- Squares in a Matrix
- Type of array
- Sum of dependencies in a graph
- Stuffs Division
- Sort in specific order
- Check if two arrays are equal or not
- Sherlock a Detective
- Check if string is rotated by two places
- Check if divisible by 11
- Maximum sum of hour glass
- Check if divisible by 4
- Substrings with similar first and last characters
- Find first set bit
- Minimize sum of alternate product
- Check for subsequence
- Find first repeated character
- Sort the fest
- Count even substrings
- Message decoding
- 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
- Find the element that appears once in sorted array
- Last index of One
- Print an array in Pendulum Arrangement
- Tracks
- Transpose of Matrix
- First element to occur k times
- Check whether K-th bit is set or not
- Length of Last word
- Extract Maximum
- Uncommon characters
- Sum of numbers in string
- Find the smallest and second smallest element in an array
- Find second largest element
- URLify a given string
- Print first letter of every word in the string
- Reverse a string with spaces intact
- Rotate Bits
- Wildcard string matching
- Sorted matrix
- Balance with respect to an array
- Equivalent Sub-Arrays
- Count pair sum
- First Come First Serve
- Friendly Array
- Swap and Maximize
- Minimum Difference among K
- Check if a string is Isogram or not
- Check Binary String
- Check Arithmetic Progression
- Fibonacci in the array
- Alternative Sorting
- Rightmost different bit
- Max value after m range operation
- Check set bits
- Fighting the darkness
- Sorting Employees
- Count Pairs Odd Xor
- Make a Palindrome
- Difficulty of sentence
- Stable Sort and Position
- Twice counter
- Shuffle integers
- Elements in the Range
- Print first n Fibonacci Numbers
- Remove repeated digits in a given number
- Maximum Integer Value
- Count triplets with sum smaller than X
- Odd to Even
- Minimum number of flipped bits
- Print Matrix in snake Pattern
- 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
- Just One Mismatch
- Smallest number repeating K times
- The Counting Game !!
- Absolute Difference of 1
- Remove common characters and concatenate
- Powers game
- Swapping Triangles
- Sums of i-th row and i-th column
- ZERO Number
- Sum of upper and lower triangles
- Left Rotate Matrix K times
- Count the characters
- Find k-th character in string
- Repeated Character
- Merge two strings
- Find the position
- Red OR Green
- Sort String
- Difference between highest and lowest occurrence
- Find unique element
- Find the fine
- Rearrange string as alternate x and y occurences
- Minimum Product of k Integers
- Maximize ∑arr[i]*i of an Array
- Sort the string in descending order
- Count number of elements between two given elements in array
- Remove all characters other than alphabets
- Find the closest number
- Sandwiched_Vowels
- Finding-Pairs
- Last index of a character in the string
- Distinct Elements in a Stream
- Print K smallest elements in their original order
- Floating point number even or odd
- Snake Case
- Check if the number is balanced
- Count the characters in each word in a given sentence
- The problem of identical arrays
- Weight of strings
- Count number of equal pairs in a string
- Number of positive integral solutions
- Extract the phone number
- Tiger Zinda Hai
- Product is even or odd?
- Remove consonants from a string
- C++ Basic Data types
- Check if actual binary representation of a number is palindrome
- C++ Corresponding position in the two strings that hold exactly the same characters.
- Most frequent word in an array of strings
- Check if strings are rotations of each other or not
- Crazy String
- Message Spreading
- Convert the string
- Sum of all sub-sequences of a number
- Perfect Square String
- Sum of f(a[i], a[j]) over all pairs in an array of n integers
- Game with nos
- Play With OR
- Tywin's War Strategy
- Ishaan Loves Chocolates
- Program for length of the longest word in a sentence
- Riya's Test
- The Penalty Shootout
- Confused pappu
- Find the Number which contain the digit d
- Maximum Perimeter of Triangle from array
- Prime String
- Height of Heap
- Average Count Array
- Java Anagram Strings
- Java Date and Day
- Java 1-d and 2-d Array
- C++ 2-D Arrays | Set-2
- Tower of Hanoi
- 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
- Implement Queue using array
- Square root
- Remove duplicate elements from sorted Array
- Print all possible strings
- Replace all 0's with 5
- Count zeros in a sorted matrix
- Third largest element
- Convert to Roman No
- Preorder Traversal
- Implement strstr
- C++ STL | Set 5 (queue)
- Remainder with 7
- Implement Atoi
- Find triplets with zero sum
- 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
- Triplet Family
- Sum of Binary Tree
- Magical Number
- longest substring containing '1'
- Pairwise Consecutive Elements
- Count Non-Leaf Nodes in Tree
- Product of array elements
- Stack designer
- Queue Designer
- Sum Array Puzzle

Name

Ashish Kumar

Rank in Institute

#4

Overall Coding Score: 1823

Monthly Coding Score: 0

Weekly Coding Score: 0

- Frequencies of Limited Range Array Elements
- Anagram
- Number of Unique Paths
- Wave Array
- Print Pattern
- Rotation
- Search in a Rotated Array
- Squares in N*N Chessboard
- Palindrome numbers
- Non Repeating Character
- Minimum number of Coins
- Distinct Substrings
- First Repeating Element
- Count Occurences of Anagrams
- Count Substrings
- Remove all duplicates from a given string
- Remove “b” and “ac” from a given string
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Finding Position
- Single Number
- Segregate even and odd nodes in a Linked List
- Count distinct pairs with difference k
- Sum of Query I
- Maximum Product Subarray
- Let's Go Shopping!
- Maximum sum increasing subsequence
- Array to BST
- Facing the sun
- Triangular Number
- Key Pair
- Lucky Number
- Reach the Nth point
- Subarray with given sum
- Adjacents are not allowed
- Leaders in an array
- Pair in array whose sum is closest to X
- Max rope cutting
- Count number of hops
- Count pairs with given sum
- Inorder Traversal and BST
- Cutting Rectangles
- Comment Removal
- Poisioned Sweet
- Two Repeated Elements
- K closest elements
- Reach a given score
- Next in Series
- Overlapping rectangles
- Maximum Collatz sequence length
- Faithful Numbers
- Cross character
- Chinky and diamonds
- Number of subsets and mean
- K-Pangrams
- Generate binary string
- 0 - 1 Knapsack Problem
- Longest Common Increasing Subsequence
- Maximum Number of 1s
- Pangram Strings
- Skip the work
- Pallindrome Patterns
- Valid Substring
- Count the Reversals
- Extract the Number from the String
- Number of ways to find two numbers
- Cutted Segments
- Number of distinct subsequences
- Game of Death in a circle
- Power of Numbers
- Permutation divisibility
- Recursively find sum of digits
- Ordering of strings
- Maximum value
- Permutation with Spaces
- Equilibrium point
- Buildings receiving sunlight
- Finding Profession
- Maximize Dot Product
- Kth boom number
- Letter Writer
- Finding the numbers
- Optimal walk
- Max and Min Products
- Equal 0, 1 and 2
- Max Length Removal
- Min Number of Flips
- Kaprekar Number
- Lucas Number
- Pairs with specific difference
- Mr. Binary
- Equal Point in Sorted Array
- Min sum formed by digits
- String Manipulation
- Help Nobita
- Binary Tree K level sum
- Maximum Sum Bitonic Subsequence
- Knapsack with Duplicate Items
- Reverse Coding
- Flood fill Algorithm
- Tom and String
- Pair with greatest product in array
- Decode the pattern
- Longest K unique characters substring
- Roman Number to Integer
- Largest Product Pallindrome
- Friends Pairing Problem
- Decode the string
- Max sum in sub-arrays
- Next Greater Even Number
- Gold Mine Problem
- Find largest word in dictionary
- Love For The Twins
- Sum of all substrings of a number
- Recaman’s sequence
- Minimum Operations
- Find all pairs with a given sum
- Check if frequencies can be equal
- Shortest distance in infinite tree
- Largest zigzag sequence
- Meta Strings
- Numbers with same first and last digit
- Temple Offerings
- Excel Sheet | Part - 2
- Largest Fibonacci Subsequence
- Increasing Sub Sequence
- Longest Palindromic Subsequence
- Evaluation of Postfix Expression
- Common elements
- Recursive sequence
- Rod Cutting
- Decreasing Sequence
- Fill array with 1's
- The Drunkard
- Element in a Series
- Array Subset of another array
- Karatsuba Algorithm
- Divisible by 5 or not-1
- First negative integer in every window of size k
- Merge two binary Max heaps
- Paths to reach origin
- Subarray with 0 sum
- Faulty wiring and Bulbs
- Get Minimum Squares
- Regular polygon-1
- Combine the strings
- Nth catalan number
- Subarrays with given sum
- Group Anagrams Together
- Number of divisors in a given range
- Sum equals to Sum
- Count the elements
- Possible Pairs
- Second most repeated string in a sequence
- Count all possible paths from top left to bottom right
- Minimum Deletions
- Shortest Common Supersequence
- Assign Mice Holes
- Mr. Modulo and Arrays
- Large number division
- Painting the Fence
- Rearrange a string
- Minimum Number in a sorted rotated array
- Find distinct elements
- Sum of length
- Bird and maximum fruit gathering
- BBT counter
- Ticket sellers
- Swapping pairs make sum equal
- Toppers Of Class
- Decode It
- Count the number of ways to tile the floor of size n x m using 1 x m size tiles
- Minimum insertions to sort an array
- Minimum number of deletions and insertions.
- Minimum number of deletions to make a sorted sequence
- Minimum steps to delete a string
- Minimum steps to minimize n as per given condition
- Minimum number of deletions.
- Closest Strings
- Longest alternating subsequence
- Ways to sum to N
- Number of substrings divisible by 8 but not by 3
- 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
- Broken blocks
- Find length of longest subsequence
- Count binary strings
- Ways to write n as sum
- Find all distinct subset (or subsequence) sums
- Maximum sum Problem
- Number of permutation with K inversions
- String comparison
- Minimum indexed character
- Find number of times a string occurs as a subsequence
- Minimum Cost To Make Two Strings Identical
- Printing Maximum Sum Increasing Subsequence
- Find minimum adjustment cost of an array
- High-effort vs. Low-effort
- Stickler Thief
- Bell Numbers
- Maximum weight transformation of a given string
- Compute sum of digits in all numbers from 1 to n
- Total number of non-decreasing numbers with n digits
- Remaining String
- Minimum Swaps for Bracket Balancing
- Maximum Product Cutting
- Power Set
- Find the most frequent digit
- Compute nCr % p
- Maximum number of zeroes
- Transform the array
- Even Fibonacci Numbers Sum
- Prime factors of LCM of array elements
- Power Of 2 and Subsequences
- Pell Number
- Second Binary Digit
- Maximum sum of subarray less than or equal to x
- Maximum possible sum
- Roll the characters of a String
- K-Ary Tree
- Star elements
- Three consecutive duplicates
- Completing tasks
- Chicks in a Zoo
- Smallest number in one swap
- Special Numbers
- Carol Numbers
- Sum of two large numbers
- Largest number in one swap
- Find the minimum time
- Geek and its Game of Coins
- Quick Exponents
- Remove minimum number of elements
- Maximum value of expression
- Pairs with Positive Negative values
- Count the pairs with maximum difference
- Numbers containing 1, 2 and 3
- Number of subarrays whose minimum and maximum are same
- Pairs with Difference less than K
- Find k-th missing element
- Ana and Sweets
- Incomplete Array
- Sum Indexes
- Find unit digit in a Product
- Power of K in N! where K may be Non Prime
- GeeksforGeeks New System
- Equal Sums
- Cluster all the 1 in a given string
- Maximum number of characters between any two same character
- Cumulative frequency of count of each element in an unsorted array
- Count of substrings containing K ones
- Minimum element whose N-th power is greater than product of an array
- Next Happy Number
- Morning Assembly
- Find the smallest root
- Fact Digit Sum
- Non-Repeating Element
- Find if string is K-Palindrome or not
- Roof Top
- Gambling Stark
- Geek and his Binary Strings
- Maximum distinct elements after removing K elements
- Maximum difference of zeros and ones in binary string
- Remove leading zeros from an IP address
- The invariable units digit
- 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
- Cosmic Number
- Winner of an election
- Maximize permutations
- Multiply by 11
- Amicable Pair
- Count ways to express N as the sum of 1,3 and 4
- Numbers with prime frequencies greater than or equal to k
- String Modification
- Easy string
- Count pairs Sum in matrices
- Print Binary Tree levels in sorted order
- Convert a sentence into its equivalent mobile numeric keypad sequence
- Arya's Long String
- Find the closest pair from two arrays
- Longest substring with equal number of 0s and 1s
- LCS of '0' K Repeated String
- Print Bracket Number
- Dr. Zora's Algorithm
- The Even Array
- The Modified String
- Check if any valid sequence is divisible by M
- Minimum changes to make all substrings distinct
- Reaching the heights
- Delete array elements which are smaller than next or become smaller
- Divisor Product
- Smallest greater elements in whole array
- Minimal moves to form a string
- Save Ironman
- Penalty Shooters
- Reverse a linked list
- Occurence of an integer in 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
- 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
- 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
- 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
- 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
- Almost Prime Numbers
- Binary Tree to BST
- K-Palindrome
- Equilibrium index of an array
- 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
- Josephus problem
- You and your books
- Expression Tree
- Maximum Difference
- Check if Linked List is Palindrome
- Max distance between same elements
- Longest Consecutive Subsequence
- Repetition of k length substring
- 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
- Count distinct elements in every window
- Max Level Sum in Binary Tree
- Special Stack
- Root to leaf paths sum
- Sort a stack
- Longest consecutive sequence in Binary tree
- Print Common Nodes in BST
- Level order traversal
- Delete nodes greater than k
- 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
- Root to Leaf Paths
- Maximum path sum
- Max and min element in Binary Tree
- Perfect Binary Tree
- XOR Linked List
- Reverse a string using Stack
- Linked List that is Sorted Alternatingly
- XOR of a given range
- Full binary tree
- Symmetric Tree
- Construct Tree from Inorder & Preorder
- Merge Lists Alternatingly
- Range of Composite numbers
- Arrange Consonants and Vowels
- 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
- Leaf under budget
- 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
- Closest Neighbor in BST
- 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
- Stack Operations
- Queue Operations
- Get min at pop
- Deque Implementations
- Min Heap implementation

- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Next Permutation
- Longest Increasing Subsequence
- 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)
- Count of n digit numbers whose sum of digits equals to given sum
- Edit Distance
- Magic Triplets
- nCr
- Maximum Rectangular Area in a Histogram
- Consecutive 1's not allowed
- Path in Matrix
- Trapping Rain Water
- Count Numbers in Range
- Rank of Matrix
- Subset Sum Problem
- Number of Coins
- Find Prime numbers in a range
- Stock buy and sell
- Largest Number formed from an Array
- Jumping Numbers
- 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
- Count Integral Points
- Nuts and Bolts Problem
- Special Keyboard
- Number of ways
- Dyck Path
- Minimum Cost of ropes
- Form a palindrome
- Inversion of array
- Preorder to Postorder
- Smallest number on left
- M-Coloring Problem
- Minimum steps to get desired array
- Dimensions of Rectangle
- Handshakes
- Tic-Tac-Toe
- Palindromic Array
- Is Binary Number Multiple of 3
- Card Rotation
- Cost of Sweets
- Crazy Equations
- Maximum Profit
- Digit multiplier
- Build the smallest
- Largest number in K swaps
- Special Matrix
- Next larger element
- LCM Triplet
- Total Decoding Messages
- Unique BST's
- Subsets
- Matchsticks game
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Kth smallest element
- Divisible by 8
- Divisibility
- Sum of Subarrays
- Prime Factors and their Powers
- Longest Common Substring
- Largest Divisibility Test
- Hamiltonian Path
- Replace O's with X's
- Partition a number into two divisible parts
- Word Boggle
- Check Mirror in N-ary tree
- Unit Area of largest region of 1's
- Express as sum of power of natural numbers
- First non-repeating character in a stream
- Magical Box
- Kth Smallest Factor
- Count subsequences of type a^i b^j c^k
- Find the largest number
- Convex Hull
- Water Overflow
- Zero Sum Subarrays
- Magnet Array Problem
- Smallest window in a string containing all the characters of another string
- Minimum number of steps to reach a given number.
- Infix to Postfix
- Largest Sum Subarray of Size at least K
- Longest Bitonic subsequence
- Mobile numeric keypad
- Cows of FooLand
- First Digit
- Number of palindromic strings
- N Digit numbers with digits in increasing order
- Sisters and coins
- Longest Common Prefix in an Array
- Count even length
- Steps by Knight
- Smith Number
- Mail System Design
- Large Product-2
- Numbers with alternative 1's
- Count of sum of consecutives
- Coins and Game
- Matrix Chain Multiplication
- Pairs of Non Coinciding Points
- Maximum Tip Calculator
- Maximum GCD Pair
- Print N-bit binary numbers having more 1’s than 0’s
- Series with largest GCD and sum equals to N
- Find the last digit when factorial of A divides factorial of B
- Last two digits of Fibonacci
- The Infinite String
- Yes XOR No
- Number of subarrays with maximum values in given range
- Party in Town
- Grouping Of Numbers
- Container with most water
- Part of it.
- 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
- Check for BST
- Bottom View of Binary Tree
- Delete without head pointer
- Intersection Point in Y Shapped Linked Lists
- Construct Binary Tree from Parent Array
- Connect Nodes at Same Level
- Flattening a Linked List
- Delete a node from BST
- The Celebrity Problem
- Topological sort
- 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
- Remove loop in Linked List
- Implementing Dijkstra | Set 1 (Adjacency Matrix)
- Max length chain
- Minimum Spanning Tree
- Interleaved Strings
- Rat in a Maze Problem
- Delete keys in a Linked list
- Merge two BST 's
- Merge k Sorted Arrays
- Length of longest palindrome in linked list
- Top View of Binary Tree
- Merge Sort on Doubly Linked List
- Binary Tree to CDLL
- Node at distance
- Leaves to DLL
- Count Number of SubTrees having given Sum
- Swap Kth nodes from ends
- Add two numbers represented by Linked List