- Print alternate elements of an array
- Sum of array elements
- Reverse an Array
- Sum of Array
- Palindrome String
- Armstrong Numbers
- Series AP
- Binary number to decimal number
- Sum of Digit is Pallindrome or not
- nPr
- Second Largest
- Reverse digits
- Check if an array is sorted
- Find the median
- GCD of two numbers
- Count of smaller elements

Name

Arpit Kapoor

Institution

Rank in Institute

#1

Courses Attended

Campus Ambassador

Overall Coding Score: 1913

Monthly Coding Score: 0

Weekly Coding Score: 0

- Print Linked List elements
- Count nodes of linked list
- Node at a given index in linked list
- Delete node in Doubly Linked List
- 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
- Doubly linked list Insertion
- Binary Search
- Add two fractions
- Count zeros in a sorted matrix
- Preorder Traversal
- Implement strstr
- Search a node in BST
- Implement Atoi
- Minimum distance between two numbers
- Find triplets with zero sum
- Minimum element in BST
- Anagram of String
- Circular Linked List Traversal
- Triplet Family
- Sum of Binary Tree
- Factorial
- Prime Number
- LCM And GCD
- GCD of Array
- Searching a number
- Power of 2
- Series GP
- Print the Kth Digit
- Majority Element
- Sieve of Eratosthenes
- Rotate Array
- Missing number in array
- Immediate Smaller Element
- Binary Array Sorting
- Number of occurrence
- k largest elements
- Pairs of prime number
- Find position of set bit
- Sum of all prime numbers between 1 and N.
- Find the Odd Occurence
- Angle between hour and minute hand
- Check if given four points form a square
- Set Bits
- Count Squares
- Nth Even Fibonacci Number
- Squares in a Matrix
- Check if two arrays are equal or not
- XOR of all elements
- Check for subsequence
- Find first repeated character
- Last index of One
- Transpose of Matrix
- First element to occur k times
- Check whether K-th bit is set or not
- Extract Maximum
- Remove Duplicates from unsorted array
- Uncommon characters
- Find minimum and maximum element in an array
- Smallest power of 2 greater than or equal to n
- Pair cube count
- Max Sum Subarray of size K
- Sort the Half Sorted
- Rightmost different bit
- Set kth bit
- Toggle bits given range
- Print first n Fibonacci Numbers
- Print Matrix in snake Pattern
- Anagram Palindrome
- Closest Number
- Merge two strings
- Sort the string in descending order
- Check if strings are rotations of each other or not
- Height of Heap
- Tower of Hanoi

- Reverse a linked list
- Occurence of an integer in a Linked List
- Delete N nodes after M nodes of 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
- Compare two linked lists
- Merge 2 sorted linked list in reverse order
- Detect Loop in linked list
- 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
- Two Mirror Trees
- Maximum Width of 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
- Insert a node in a BST
- BFS of graph
- Determine if Two Trees are Identical
- Root to leaf path sum
- Print all nodes that don't have sibling
- 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
- 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
- Match specific pattern
- Validate an IP Address
- Sorted subsequence of size 3
- Josephus problem
- Expression Tree
- Maximum Difference
- Check if Linked List is Palindrome
- Longest Consecutive Subsequence
- Generate Grey Code Sequences
- Delete a Node in Single Linked List
- Kth largest element in BST
- Find duplicates in an array
- Count distinct elements in every window
- Check if two strings are k-anagrams or not
- 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
- Union of Two Linked Lists
- Intersection of Two Linked Lists
- Disjoint set (Union-Find)
- Insert in a Sorted List
- Ancestors in Binary Tree
- Level of a Node in Binary Tree
- Root to Leaf Paths
- Maximum path sum
- XOR Linked List
- Counting elements in two arrays
- Reverse a string using Stack
- Full binary tree
- Triplet with 0 sum in BST
- Symmetric Tree
- Construct Tree from Inorder & Preorder
- Merge Lists Alternatingly
- 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
- Predecessor and Successor
- Children Sum Parent
- Find length of Loop
- Median of BST
- Reverse First K elements of Queue
- Remove Half Nodes
- Height of Spiral Tree
- Sum of Leaf Nodes
- Nodes at Odd Levels
- Closest Neighbor in BST
- ZigZag Tree Traversal
- Sum of Leaf Nodes at Min Level
- Move all zeros to the front of the linked list
- Delete middle element of a stack
- Rotate doubly Linked List
- Find the Frequency
- Get min at pop
- Deque Implementations
- Min Heap implementation
- Reverse words in a given string
- Frequencies of Limited Range Array Elements
- Anagram
- Wave Array
- Print Pattern
- Search in a Rotated Array
- Squares in N*N Chessboard
- Palindrome numbers
- Magic Number
- Trailing zeroes in factorial
- Maximize Number of 1's
- Non Repeating Character
- Sum of Middle Elements of two sorted arrays
- Count Occurences of Anagrams
- Reverse words in a given string
- Count Substrings
- Move all zeroes to end of array
- Remove all duplicates from a given string
- Activity Selection
- Remove “b” and “ac” from a given string
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Two numbers with sum closest to zero
- Finding Number
- Maximum value in a bitonic array
- Next greater number set digits
- Finding Position
- Amount of Water
- Single Number
- Element that appears once where every element occurs twice
- Longest Distinct characters in string
- Replace by X
- Is Square
- Column name from a given column number
- Maximum Product Subarray
- N meetings in one room
- Remove minimum elements
- Remove Duplicates
- Kth distance
- Addition of submatrix
- Maximum sum increasing subsequence
- Array to BST
- Sum of two numbers represented as arrays
- Facing the sun
- Triangular Number
- Max Sum without Adjacents
- Key Pair
- Add Binary Strings
- Product array puzzle
- Reverse Bits
- Count Smaller elements
- Reach the Nth point
- Subarray with given sum
- Leaders in an array
- Swap all odd and even bits
- Count number of hops
- Equal to product
- Count pairs with given sum
- Inorder Traversal and BST
- Triplet Sum in Array
- Three Great Candidates
- K closest elements
- Overlapping rectangles
- Minimum element in a sorted and rotated array
- Search in a matrix
- Number Of Open Doors
- Day of the week
- Number of 1's in smallest repunits
- Chinky and diamonds
- Missing element of AP
- Count the Zeros
- 0 - 1 Knapsack Problem
- Valid Substring
- Count the Reversals
- Maximize The Cut Segments
- Power of Numbers
- Perfect Numbers
- Largest number with given sum
- The Nth Fibonnaci
- Permutation with Spaces
- Element appearing once
- Equilibrium point
- Floor in a Sorted Array
- Buildings receiving sunlight
- RegEx matching
- Max value
- Flip Bits
- Finding the numbers
- Min sum formed by digits
- String Manipulation
- Help Nobita
- Chocolate Distribution Problem
- Knapsack with Duplicate Items
- Flood fill Algorithm
- Longest K unique characters substring
- Roman Number to Integer
- Maximum no of 1's row
- Decode the string
- Max sum in sub-arrays
- Gold Mine Problem
- Game of XOR
- Find Nth root of M
- Find all pairs with a given sum
- Meta Strings
- Excel Sheet | Part - 2
- Find the string in grid
- Largest Fibonacci Subsequence
- Longest Palindromic Subsequence
- Fractional Knapsack
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- Common elements
- Rod Cutting
- Fill array with 1's
- Element with left side smaller and right side greater
- Transitive closure of a Graph
- Array Subset of another array
- First negative integer in every window of size k
- Game with String
- Four Elements
- Subarray with 0 sum
- 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
- Shortest Common Supersequence
- Find distinct elements
- Number of Groups
- Swapping pairs make sum equal
- Decode It
- String Ignorance
- Nth item through sum
- String comparison
- Stickler Thief
- Even and odd elements at even and odd positions
- Transform the array
- Sum of Lengths of Non-Overlapping SubArrays
- Common Subsequence
- Count the triplets
- Star elements
- Sum of two large numbers
- Prime number of set bits
- Pairs with Positive Negative values
- Non-Repeating Element
- Longest common prefix
- Find winner of the Game of Nim
- Arya and The Great War
- Nearest multiple of 10
- Word with maximum frequency
- Check if array contains contiguous integers with duplicates allowed
- Maximum height of the staircase
- Winner of an election
- Ease the Array
- Easy string
- Count pairs Sum in matrices
- Print Binary Tree levels in sorted order
- Print Bracket Number
- Delete array elements which are smaller than next or become smaller
- Save Ironman
- Print adjacency list
- Pair with given sum in a sorted array

- Reverse a Linked List in groups of given size.
- 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
- 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
- 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
- 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
- Find the Closest Element in BST
- 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
- Top View of Binary Tree
- k-th smallest element in BST
- Polynomial Addition
- Euler Circuit in a Directed Graph
- Euler circuit and Path
- Merge Sort on Doubly Linked List
- Binary Tree to CDLL
- Find a pair with given target in BST
- K-Sum Paths
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Node at distance
- Pairs violating BST property
- Leaves to DLL
- 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
- Smallest Positive missing number
- Unique BST's
- Unit Area of largest region of 1's
- Subarrays with equal 1s and 0s
- Sorting Elements of an Array by Frequency
- Longest consecutive subsequence
- Case-specific Sorting of Strings
- Count ways to N'th Stair(Order does not matter)
- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Complement
- Excel Sheet | Part - 1
- Maximum Sub Array
- 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
- Longest Span with same Sum in two Binary arrays
- Min Coin
- 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
- Sum of bit differences
- Subset Sum Problem
- Maximize The Array
- Factorials of large numbers
- Number of Coins
- Minimum Platforms
- Number following a pattern
- Find Prime numbers in a range
- Stock buy and sell
- Largest Number formed from an Array
- Number of paths in a matrix with k coins
- Longest Palindrome in a String
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Relative Sorting
- 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
- Maximum length Bitonic Subarray
- Length of the longest substring
- Smallest number on left
- Longest consecutive subsequence
- Maximum Sum Path in Two Arrays
- Stock span problem
- Convert an array to reduced form
- M-Coloring Problem
- Minimum steps to get desired array
- Handshakes
- Tic-Tac-Toe
- Number to words
- Palindromic Array
- Betting game
- Is Binary Number Multiple of 3
- Possible groups
- Distributing Balls
- Preorder Traversal and BST
- Max possible amount
- Bleak Numbers
- Number of pairs
- Satisfy the equation
- Minimum sum
- Digit multiplier
- Circle of strings
- Nodes at even distance
- Largest number in K swaps
- Special Matrix
- Minimize the heights
- Next larger element
- Taking 1 out of 3 consecutives
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Subsets
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Longest Prefix Suffix
- Kth smallest element
- 3 Divisors
- Sum of Subarrays
- Maximum calorie
- Longest Common Substring
- Count Palindrome Sub-Strings of a String
- Hamiltonian Path
- Minimums in Array
- Snake and Ladder Problem
- Recursively remove all adjacent duplicates
- Shortest Source to Destination Path
- Trie | (Insert and Search)
- Replace O's with X's
- Knight Walk
- Find all four sum numbers
- Word Boggle
- 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
- 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
- K
^{th}largest element in a stream - Water Overflow
- Zero Sum Subarrays
- Magnet Array Problem
- Smallest window in a string containing all the characters of another string
- Smallest distinct window
- Floyd Warshall
- Nearly Sorted Algorithm
- Infix to Postfix
- Smallest Absolute Difference
- Largest Sum Subarray of Size at least K
- Smallest Positive missing number
- Longest Bitonic subsequence
- Maximum sum Rectangle
- Maximum Intervals Overlap
- Perfect Sum Problem
- Array Pair Sum Divisibility Problem
- Job Sequencing Problem
- Top k numbers in a stream
- Page Faults in LRU
- Count possible ways to construct buildings
- Rotten Oranges
- Modify array to maximize sum of adjacent differences
- Minimum cost to fill given weight in a bag
- Count even length
- Steps by Knight
- Median In a Row-Wise sorted Matrix
- In First But Second
- Mail System Design
- Row with minimum number of 1's
- Smallest Non-Zero Number
- Subarray Inversions
- Matrix Chain Multiplication
- Pairs of Non Coinciding Points
- Maximum bitonic subarray sum
- Maximum Tip Calculator
- Find the element at given index
- Count divisors of product of array elements
- Queries for counts of multiples in an array
- Last two digits of Fibonacci
- Number of subarrays with maximum values in given range
- Fill the Tank
- Longest subarray with sum divisible by K
- Subarrays with equal 1s and 0s
- Longest Sub-Array with Sum K
- Sick Pasha
- The Fibonacci-prime number
- Santa Banta
- The Tiny Miny
- Sum of XOR of all pairs
- Marks of PCM
- Water Connection Problem
- Save Gotham!
- The Painter's Partition Problem
- Aditya and his building blocks
- Maximize the sum of selected numbers from an array to make it empty
- Lucky alive person in a circle
- Rat Maze With Multiple Jumps
- Castle RUN
- Smaller on Left
- A difference of values and indexes
- Possible paths between 2 vertices
- Maximum Product of Increasing Subsequence of Size 3
- Optimal Strategy For A Game

- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- Alien Dictionary
- Fixing Two nodes of a BST
- Minimum Points To Reach Destination
- Minimum sum partition
- Maximum of minimum for every window size
- Merge Without Extra Space
- Next Smallest Palindrome
- 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
- Minimum Cost Path
- N-Queen Problem
- Solve the Sudoku
- Find median in a stream
- Distinct palindromic substrings
- Convert to Strictly increasing array
- Count the subarrays having product less than k