- Sum of array elements
- Reverse an Array
- Maximum and Minimum Of Array Elements
- Sum Of Digits
- Pascal Triangle
- Alone in couple
- Sum of Array
- Odd or Even
- a^b (Set 1)-(ambiguous)
- Number of factors
- Leap Year
- Palindrome String
- Armstrong Numbers
- Greatest of three numbers
- Swap two numbers
- Multiply 2 matrices
- Sum of Series
- Series AP
- Small Factorial
- Addition of Two Numbers
- Print Elements of Array
- Area of Rectange, Right Angled Triangle and Circle
- Binary number to decimal number
- Vowel or Not
- Print table
- Simple Interest
- Compound Interest
- Sum of Digit is Pallindrome or not
- Surface Area and Volume of Cuboid
- Automorphic Number
- Sum of an AP
- Sum of GP
- Print 1 to n without using loops
- nPr
- Count Alphabets
- Fascinating Number
- Remove characters from alphanumeric string
- Pattern Printing
- Remove Spaces
- Value equal to index value
- Decimal to any base conversion
- All divisors of a natural number
- Check if a number is Perfect Square
- Number Pattern
- Swap kth elements
- Second Largest
- Reverse digits
- 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
- Sum of Digits Multiple - copy
- Perfect Number
- Multiples Power
- Multiply Array
- Diagonal sum
- Combinational Logic
- At least two greater elements
- Compete the skills
- Count of camel case characters
- Find difference between sum of diagonals
- Print the left element
- C++ Loops | Set 1 (Print a string N times)
- Distance between 2 points
- Sum of elements in a matrix
- Reversing the vowels
- Sum Palindrome
- Display longest name
- C++ Operators | Set 1 (Arithmetic)
- Reverse a String
- C++ Hello World
- C++ if-else (Decision Making)
- C++ Arrays (Sum of array) | Set 1
- C++ Strings
- C++ Array (print an element) | Set 2
- C++ Switch Case Statement
- C++ Operators (Relational) | Set 2
- Floyd's triangle
- GCD of two numbers
- Largest Element in Array
- Addition of two square matrices
- Identical Matrices
- C++ Data Types
- Time to Words
- Convert time from 12 hour to 24 hour format
- Java Hello World
- Java if-else (Decision Making)
- Java Switch Case statement
- Java loops | Set 1
- Java Arrays | Set 1
- Java Strings | Set 1
- Count of smaller elements
- Split Strings
- Count Digits
- Find Index
- Even Odd Sum
- Count type of Characters
- Number of Diagonals
- Decimal to binary
- Check String
- Change the string
- Sum of diagonals
- Extract the integers
- Check if two given circles touch each other
- Remove vowels from string
- Upper case conversion
- Sum of odd and even elements
- Sum of AP series
- Perfect Arrays
- Full Prime
- Convert a list of characters into a String
- Determine focal length of a spherical mirror
- The dice problem
- Find n-th term of series 1, 3, 6, 10, 15, 21
- C++ Input / Output
- Power of Pow | Even Number
- Power of Pow | Odd Numbers
- Java Input/Output
- Java Reverse a String
- Java Delete alternate characters
- Java Substring
- Java Convert String to LowerCase
- C++ 2-D Arrays | Set-1
- Java Basic Data Types
- Java Operators(Relational) | Set - 2
- Check for Binary
- Replace all 0's with 5
- Print the pattern | Set-1
- Toeplitz matrix
- Palindromic Array
- Multiply Matrices
- C++ Pointers ( Incrementing a variable) | Set 1
- C++ Functions (Sum of numbers) | Set 1
- Print alternate elements of an array
- Java Inheritance
- Java Abstract keyword
- Java Override
- Java Classes Introduction

Name

Piyush Asutkar

Rank in Institute

#4

Courses Attended

Campus Ambassador

Overall Coding Score: 1547

Monthly Coding Score: 340

Weekly Coding Score: 32

- Search an Element in an array
- Maximum Occuring Character
- Consecutive elements
- Factorial
- Prime Number
- LCM And GCD
- GCD of Array
- 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
- Weird 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
- 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
- Numbers containing 0's from 1 to N
- Segregate Even and Odd numbers
- Find number of days between two given dates
- 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
- nth digit of Fibonacci
- Sum of distinct elements
- Binary Array Sorting
- Intersection of two arrays
- Union of two arrays
- Convert array into Zig-Zag fashion
- Remove character
- Perfect Cubes in a Range
- Number of occurrence
- Maximum repeating number
- Point lies or not
- 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
- Evaluate the x + a = b statement
- Triangle growing downwards
- Find position of set bit
- Sum of all prime numbers between 1 and N.
- Pattern Jumping
- Jumping Geek
- Sum of Digits Divisibility
- Maximum distance
- Maximum money
- Palindromic Subsequences
- Ways To Tile A Floor
- Middle of Three
- Generate Binary Numbers
- Shortest direction
- Smallest number
- Factorial Number
- Count the numbers
- Find the Odd Occurence
- Find the remainder
- Angle between hour and minute hand
- Sum of large numbers
- Keypad typing
- Euler Totient Sum and Divisors
- Check if given four points form a square
- Maximum Possible Sum of Products
- Rotating an Array
- Divide the number
- Sum of Products
- LCM of given array elements
- Number of Integer solutions
- Extraction of secret message
- Even occurring elements
- Missing ranges of numbers
- Help the Old Man!!!
- Punish the Students
- Searching an element in a sorted array
- Base Conversion
- Total count
- Compare two Large Numbers
- Surpasser Count
- The Lazy Caterer's Problem
- Matching Pair
- How many pizzas ?
- Sum of primes
- Merge and Sort
- Minimize string value
- Composite Series
- Rotate by 90 degree
- Rearranging array
- Reverse array in groups
- The AND Gate
- Maximum Area
- The OR Gate
- 1's Complement
- The XOR Gate
- Good String
- Mega Sale
- Set Bits
- Repeated sum of digits
- Subset Sums
- Professor and Parties
- Longest Consecutive 1's
- Different ways to Spell a Number
- Sum of divisors
- Common Divisors
- Count Squares
- Square Divisors
- Perfect Reversible String
- Max-Min conversion
- Unusual String Sort
- Minimize the sum of product
- Missing number
- Find Substring from last of the Given String
- Permutations in array
- Help a Thief!!!
- Form a Triangle
- Find duplicates under given constraints
- Find first and last occurrence of x
- Sort in specific order
- Form largest number from digits
- Check if string is rotated by two places
- Maximum sum of hour glass
- Sort the fest
- XOR play
- Tidy Number
- Check if date is valid
- Split the string
- Find the element that appears once in sorted array
- Last index of One
- Cyclically rotate an array by one
- Sum Triangle for given array
- Print an array in Pendulum Arrangement
- Transpose of Matrix
- Java Operators(Arithmetic) | Set 1
- Find the smallest and second smallest element in an array
- Find minimum and maximum element in an array
- Find second largest element
- Area of a triangle
- Balanced Array
- Swap and Maximize
- Minimum Difference among K
- Check if a string is Isogram or not
- Check Arithmetic Progression
- Sort the Half Sorted
- Alternative Sorting
- Quick Left Rotation
- Stable Sort and Position
- Elements in the Range
- Distinct Adjacent Element
- Remove repeated digits in a given number
- Linear Diophantine Equations
- Count digits in given number N which divide N
- Rearrange the array
- Part Sort
- Repated Sum and then Multiply
- G.F Series
- Minimum Product of k Integers
- Sandwiched_Vowels
- Semi Prime
- Factors Sum
- Check if the number is balanced
- Count the characters in each word in a given sentence
- Find sum of even factors of a number
- The problem of identical arrays
- Weight of strings
- Count number of equal pairs in a string
- Number of positive integral solutions
- Numbers having alternate bits in range 1 to n
- Extract the phone number
- Product is even or odd?
- Remove consonants from a string
- Earthquake and the Paint Shop
- C++ Basic Data types
- C++ A Speed Breaker
- Sum of fifth powers of the first n natural numbers
- C++ Nega Bit
- Check if actual binary representation of a number is palindrome
- Compare two fractions
- Trimorphic Number
- C++ Corresponding position in the two strings that hold exactly the same characters.
- Product of maximum in first array and minimum in second
- Palindrome in both Decimal and Binary
- Most frequent word in an array of strings
- Check if strings are rotations of each other or not
- Sophie Germain Prime
- Reading books
- Encoding names
- Crazy String
- Set all odd bits
- Message Spreading
- Convert the string
- Is digital root of N a prime?
- Making elements distinct
- C++ Function Overloading
- C++ Sets
- Azad and Chocolates
- The amazing number
- Countries at war
- Jumpy Ball
- Sum of all sub-sequences of a number
- Last duplicate element in a sorted array
- Perfect Square String
- 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
- Prime number validation-JAVA regex
- Pattern-1
- Ishaan's Internship
- Ishaan Loves Chocolates
- Cricket Average
- Midori and chocolates
- Ishaan's Sum Problem
- Ishaan's Weight
- Dull Jack
- Chocolate lengths
- Factor OR Multiple
- Jay's Apples
- Lottery Money
- Program for length of the longest word in a sentence
- String of Commons
- The Modulo Task
- Riya's Test
- The Penalty Shootout
- Number Series
- GOT TV series
- The Number System
- Confused pappu
- Difference series
- Reducing Walls
- Multiply left and right array sum.
- Find the Number which contain the digit d
- Gray Code
- Gray to Binary equivalent
- Maximum Perimeter of Triangle from array
- Doctors Clinic
- How Many X's?
- Prime String
- Height of Heap
- Fibonacci to N
- Average Count Array
- The Spider Steps
- Java Anagram Strings
- Java Date and Day
- Java Collection | Set 1 (ArrayList) Part-1
- Java Collection | Set 3 (HashMap) Part-1
- Java 1-d and 2-d Array
- Java Iterator
- C++ 2-D Arrays | Set-2
- Tower of Hanoi
- Print Linked List elements
- Count nodes of linked list
- Node at a given index in linked list
- Power of Four
- Delete node in Doubly Linked List
- Size of Binary Tree
- Inorder Traversal
- Bubble Sort
- 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
- Insert a node in Doubly linked list
- Binary Search
- Remove duplicate elements from sorted Array
- Print all possible strings
- Add two fractions
- 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
- C++ STL | Set 1 (vector)
- C++ STL | Set 3 (map)
- C++ STL | Set 4 (stack)
- C++ STL | Set 5 (queue)
- Middle Pattern
- C++ STL | Set 6 (set)
- Search a node in BST
- Equal Sum and XOR
- C++ STL | Set 7 (unordered map)
- C++ STL | Set 8 (unordered set)
- Smallest divisible number
- Remainder with 7
- Java Collection | Set 4 (TreeMap)
- Implement Atoi
- Java Collection | Set 5 (LinkedHash Set)
- Find Number of Numbers
- Minimum distance between two numbers
- Find triplets with zero sum
- Operating an array
- Linked List Insertion
- Operating a sorted array- copy
- Play with an array
- Minimum element in BST
- Anagram of String
- 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
- longest substring containing '1'
- Pairwise Consecutive Elements
- Nth Multiple
- Count Non-Leaf Nodes in Tree
- C++ STL List
- C++ STL Deque
- C++ Classes Introduction
- Mrs. S- JAVA Bits Set 1
- Product of array elements
- C++ Inheritance introduction
- C++ Call by reference
- Java Interface
- Java Collections | Set 8 (TreeSet)
- Java Generic Class
- Java Collections | Set 9 (Queue)
- Start Coding
- logical Operators
- Sort and Reverse Vector
- Front to Back
- Stack designer
- Queue Designer
- Sum the common elements
- Parties and seats
- Set Operations
- Map Operations
- Sum Array Puzzle

- 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
- Rectangles in N*N Board
- Squares in N*N Chessboard
- Palindrome numbers
- Subarray with least average
- Magic Number
- Maximize Toys
- Large Factorial
- Trailing zeroes in factorial
- Maximize Number of 1's
- Non Repeating Character
- a^b(Set 2)
- Minimum number of Coins
- Count Odd Factors
- Distinct Substrings
- Sum of Middle Elements of two sorted arrays
- Good Pairs
- First Repeating Element
- Count Occurences of Anagrams
- Forming Rectangle
- 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
- Maximum Product Subarray
- Maximum sum increasing subsequence
- Array to BST
- Facing the sun
- Max Sum without Adjacents
- Key Pair
- Inversion of array
- Maximum Difference
- Length Unsorted Subarray
- Count Smaller elements
- Reach the Nth point
- Leaders in an array
- Count number of hops
- Equal to product
- Inorder Traversal and BST
- Segregate 0s and 1s
- Triplet Sum in Array
- Two Repeated Elements
- Three Great Candidates
- K closest elements
- Reach a given score
- Overlapping rectangles
- Inverted triangle of stars
- Y shaped pattern
- Minimum element in a sorted and rotated array
- Search in a matrix
- Number Of Open Doors
- Chinky and diamonds
- Shop in Candy Store
- Count the Zeros
- Distinct absolute array elements
- 0 - 1 Knapsack Problem
- Maximum Number of 1s
- Pangram Checking
- Skip the work
- Valid Substring
- Count the Reversals
- Last Match
- Special array reversal
- Minimum number of swaps needed
- Maximum average subarray
- Help Mommy out
- Next larger element
- Class Average
- Permutation divisibility
- Left out candies
- Change Bits
- Element appearing once
- Equilibrium point
- Floor in a Sorted Array
- Buildings receiving sunlight
- Max value
- Missing number in matrix
- Faulty Keyboard
- 3 Divisors
- Sort by Set Bit Count
- Count Increasing Subsequences
- Prime Factors
- Least Prime Factor
- Happy Number
- Maximize sum after K negations
- Largest Even Number
- Sum of elements between k1'th and k2'th smallest elements
- Min sum formed by digits
- Min Subsets with Consecutive Numbers
- Move all negative elements to end
- String Manipulation
- Binary Tree K level sum
- Let's Play!!!
- Sum of k smallest elements in BST
- Pair with greatest product in array
- Drive the car
- Decode the string
- Max sum in sub-arrays
- Smallest subarray with sum greater than x
- Shortest distance in infinite tree
- Evaluation of Postfix Expression
- Common elements
- Efficiently sorting numbers in range from 0 to n^2 - 1
- Element with left side smaller and right side greater
- Array Subset of another array
- First negative integer in every window of size k
- Game with String
- Find Pair Given Difference
- Count all possible paths from top left to bottom right
- Sort the given array after applying the given equation
- Happiest Triplet
- Sort by Absolute Difference
- BBT counter
- Bitonic Generator Sort
- Stickler Thief
- K-Ary Tree
- Rearrange array such that even positioned are greater than odd
- Maximize the volume of Cuboid
- Reorganize The Array
- Ease the Array
- Easy string
- Print Binary Tree levels in sorted order
- Find the closest pair from two arrays
- Maximum sum of increasing order elements from n arrays
- Print Bracket Number
- Searching in an array where adjacent differ by at most k
- Delete array elements which are smaller than next or become smaller
- Smallest greater elements in whole 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
- 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
- N
^{th}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
- 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
- Odd even level difference
- Binary Tree to BST
- Max sum in the configuration
- Get minimum element from stack
- Remove every k'th node
- Leaf at same level
- Is Binary Tree Heap
- Subtraction in Linked List
- Multiply two linked lists
- Distinct occurrences
- Sorted subsequence of size 3
- Expression Tree
- Maximum Difference
- Check whether BST contains Dead End
- Kth largest element in BST
- Find duplicates in an array
- 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
- Delete nodes greater than k
- Index Of an Extra Element
- Merge Sort for Linked List
- Convert Ternary Expression to Binary Tree
- 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
- Counting elements in two arrays
- 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
- Vertical sum
- Next Right Node
- 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
- 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
- Deletion in a Binary Tree
- Nodes at Odd Levels
- 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
- Delete middle element of a stack
- Vertical Width of a Binary Tree
- Stack Operations
- Queue Operations
- Get min at pop
- Deque Implementations
- Min Heap implementation

- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Overlapping Intervals
- Maximum Index
- 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
- nCr
- Maximum Rectangular Area in a Histogram
- Min Coin
- Path in Matrix
- Trapping Rain Water
- Case-specific Sorting of Strings
- Subset Sum Problem
- Number of Coins
- Number following a pattern
- Find Prime numbers in a range
- Largest Number formed from an Array
- Number of paths in a matrix with k coins
- Possible words from Phone digits
- Jumping Numbers
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Relative Sorting
- Maximum of all subarrays of size k
- Row with max 1s
- Boolean Matrix Problem
- Sorting Elements of an Array by Frequency
- Design a tiny URL or URL shortener
- Rotate a 2D array without using extra space
- Number of ways
- Minimum Cost of ropes
- Form a palindrome
- Preorder to Postorder
- Smallest number on left
- Stock span problem
- Convert an array to reduced form
- Minimum steps to get desired array
- Palindromic Array
- Is Binary Number Multiple of 3
- Possible groups
- Preorder Traversal and BST
- Card Rotation
- Bleak Numbers
- Number of pairs
- Smallest Sub-Array
- Minimum sum
- Taking 1 out of 3 consecutives
- X Total Shapes
- Matchsticks game
- Kth smallest element
- Longest Common Substring
- Rotate and delete
- Sonam Bewafa asks questions
- Count the Number of Full Binary Trees
- Print leaf nodes from preorder traversal of BST
- Distance of nearest cell having 1
- Largest prime factor
- Check Mirror in N-ary tree
- First non-repeating character in a stream
- K
^{th}largest element in a stream - Infix to Postfix
- Smallest Absolute Difference
- Smallest Positive missing number
- Longest Bitonic subsequence
- Firing employees
- Image Multiplication
- Rotten Oranges
- Steps by Knight
- Geek and Strings
- Save Gotham!
- Minimum swaps and K together
- Part of it.
- Range Queries for Longest Correct Bracket Subsequence
- 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
- Min distance between two given nodes of a Binary Tree
- Maximum difference between node and its ancestor
- The Celebrity Problem
- Print a Binary Tree in Vertical Order
- Merge K sorted linked lists
- Serialize and Deserialize a Binary Tree
- Circular tour
- Max rectangle
- Make Binary Tree
- Check if subtree
- Extreme nodes in alternate order
- Kth element in Matrix
- Clone a Binary Tree
- Remove loop in Linked List
- Largest BST
- LRU Cache
- Number of root to leaf paths
- Find the Closest Element in BST
- Merge two BST 's
- Merge k Sorted Arrays
- Print Nodes having K leaves
- Duplicate subtree in Binary Tree
- Top View of Binary Tree
- k-th smallest element in BST
- Merge Sort on Doubly Linked List
- Binary Tree to CDLL
- Count Element Occurences
- Complete Binary Tree
- Populate Inorder Successor for all nodes
- Construct expression tree
- K-Sum Paths
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Construct tree from Inorder and LevelOrder
- Node at distance
- Mirror of a given node
- Pairs violating BST property
- Leaves to DLL
- Largest Independent Set Problem
- Right Sibling in Binary Tree
- Duplicate Subtrees
- Construct Tree from Preorder Traversal
- Construct a Full Binary Tree
- Convert Level Order Traversal to BST
- Count Number of SubTrees having given Sum
- Operations on PriorityQueue