- Inorder Traversal
- Count Leaves in Binary Tree
- Height of Binary Tree
- Finding middle element in a linked list
- Postorder Traversal
- Preorder Traversal
- Binary String
- Ways To Tile A Floor
- Find the element that appears once in sorted array
- Check set bits
- The Counting Game !!
- Find the fine
- Product of maximum in first array and minimum in second
- Ishaan Loves Chocolates

Name

Pulkit Sharma

Rank in Institute

#1

Courses Attended

Campus Ambassador

Overall Coding Score: 1890

Monthly Coding Score: 8

Weekly Coding Score: 2

- Reverse a linked list
- Occurence of an integer in a Linked List
- Given a linked list of 0s, 1s and 2s, sort it.
- linked list of strings forms a palindrome
- Detect Loop in linked list
- Remove duplicates from an unsorted linked list
- Reverse a Doubly Linked List
- Merge Sort
- Quick Sort
- K distance from root
- Mirror Tree
- Diameter of Binary Tree
- Nth node from end of linked list
- Delete Middle of Linked List
- Merge two sorted linked lists
- Transform to Sum Tree
- Remove duplicate element from sorted Linked List
- Reverse Level Order Traversal
- DFS of Graph
- BFS of graph
- Lowest Common Ancestor in a Binary Tree
- Determine if Two Trees are Identical
- Lowest Common Ancestor in a BST
- Find nth element of spiral matrix
- Distinct occurrences
- Expression Tree
- Minimum four sum subsequence
- Root to leaf paths sum
- Level order traversal
- Peak element
- Index Of an Extra Element
- Merge Sort for Linked List
- Convert Ternary Expression to Binary Tree
- Sum of leaf nodes in BST
- Max and min element in Binary Tree
- Linked List that is Sorted Alternatingly
- Construct Tree from Inorder & Preorder
- Vertical sum
- Count Pairs whose sum is equal to X
- Predecessor and Successor
- Children Sum Parent
- Linked List Matrix
- Remove Half Nodes
- Sum of Leaf Nodes
- Rotate doubly Linked List
- Need Some Change
- Learning Structs
- Find the Frequency
- Back to Front
- Wave Array
- Non Repeating Character
- Reverse words in a given string
- Move all zeroes to end of array
- 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
- Key Pair
- Maximum Difference
- Reverse Bits
- Count Smaller elements
- Subarray with given sum
- Adjacents are not allowed
- Count pairs with given sum
- Inorder Traversal and BST
- Triplet Sum in Array
- Reach a given score
- Search in a matrix
- Largest power of prime
- Check If two Line segments Intersect
- Count the Zeros
- 0 - 1 Knapsack Problem
- Game of Death in a circle
- Power of Numbers
- Ordering of strings
- Element appearing once
- Equal 0, 1 and 2
- Flood fill Algorithm
- Decode the pattern
- Smallest subarray with sum greater than x
- Love For The Twins
- Longest Palindromic Subsequence
- Fractional Knapsack
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- 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
- Get Minimum Squares
- Count all possible paths from top left to bottom right
- Nth item through sum
- Maximum sum Problem
- Stickler Thief
- Power Set
- Arya and The Great War
- Word with maximum frequency
- Ease the Array
- Swap every two bits in bytes
- Ishaan's Curiosity
- The Even Array
- Print adjacency list

- Given a linked list, reverse alternate nodes and append at the end
- Reverse a Linked List in groups of given size.
- Delete nodes having greater value on right
- Quick Sort on Linked List
- Count BST nodes that lie in a given range
- Check for BST
- Tree from Postorder and Inorder
- Bottom View of Binary Tree
- Delete without head pointer
- Intersection Point in Y Shapped Linked Lists
- Add all greater values to every node in a BST
- Construct Binary Tree from Parent Array
- Connect Nodes at Same Level
- Clone a linked list with next and random pointer
- 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
- Range Minimum Query
- The Celebrity Problem
- Topological sort
- Print a Binary Tree in Vertical Order
- Merge K sorted linked lists
- Find the number of islands
- Serialize and Deserialize a Binary Tree
- Circular tour
- Wildcard Pattern Matching
- Max rectangle
- Make Binary Tree From Linked List
- Generate IP Addresses
- Check if subtree
- Extreme nodes in alternate order
- Kth element in Matrix
- Clone a Binary Tree
- Remove loop in Linked List
- Implementing Dijkstra | Set 1 (Adjacency Matrix)
- Max length chain
- Additive sequence
- Largest BST
- LRU Cache
- Box Stacking
- Count Palindromic Subsequences
- Multiply two strings
- Minimum Swaps to Sort
- Strongly Connected Components (Kosaraju's Algo)
- Rat in a Maze Problem
- Bipartite Graph
- Max sum subarray by removing at most one element
- Number of root to leaf paths
- Find the Closest Element in BST
- Pots of Gold Game
- Delete keys in a Linked list
- Merge two BST 's
- Merge k Sorted Arrays
- Length of longest palindrome in linked list
- Bridge Edge in Graph
- Print Nodes having K leaves
- Duplicate subtree in Binary Tree
- Find the missing no in string
- Top View of Binary Tree
- Smallest range in K lists
- k-th smallest element in BST
- Polynomial Addition
- Euler Circuit in a Directed Graph
- Euler circuit and Path
- Merge Sort on Doubly Linked List
- Binary Tree to CDLL
- Find a pair with given target in BST
- Occurences of 2 as a digit
- 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
- Maximum path sum from any node
- 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
- Path Count in Directed Graph
- C++ Friend function
- C++ Generic sort
- Operations on PriorityQueue
- Swap Kth nodes from ends
- Maximum sum of Non-adjacent nodes
- Smallest Positive missing number
- Unique BST's
- Distance of nearest cell having 1
- Unit Area of largest region of 1's
- Subarrays with equal 1s and 0s
- Sorting Elements of an Array by Frequency
- Longest consecutive subsequence
- Case-specific Sorting of Strings
- M-Coloring Problem
- Count ways to N'th Stair(Order does not matter)
- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Sum Of Prime
- Excel Sheet | Part - 1
- 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
- Consecutive 1's not allowed
- Count of Subarrays
- Longest Even Length Substring
- Path in Matrix
- Trapping Rain Water
- Case-specific Sorting of Strings
- Sum of bit differences
- Subset Sum Problem
- 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
- Jumping Numbers
- Longest Palindrome in a String
- Modular Exponentiation for large numbers
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Concatenation of Zig-Zag String in ‘n’ Rows
- 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
- Count Integral Points
- 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
- Dyck Path
- 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
- Largest subsquare surrounded by ‘X’
- Maximum Sum Path in Two Arrays
- Stock span problem
- Convert an array to reduced form
- M-Coloring Problem
- Minimum steps to get desired array
- Handshakes
- Number to words
- Palindromic Array
- Betting game
- Is Binary Number Multiple of 3
- Possible groups
- Maximum Sum Subsequence of length k
- Preorder Traversal and BST
- Card Rotation
- Search Pattern
- Longest Arithmetic Progression
- Subsets with XOR value
- Max possible amount
- Cost of Sweets
- Bleak Numbers
- Number of pairs
- Smallest Sub-Array
- Maximum XOR subset
- Maximum Profit
- Minimum sum
- Circle of strings
- Nodes at even distance
- Build the smallest
- Queries on Strings
- Your Social Network
- Largest number in K swaps
- Special Matrix
- Next larger element
- Taking 1 out of 3 consecutives
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Distinct Transformations
- Subsets
- Matchsticks game
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Kth smallest element
- Divisible by 8
- Sum of Subarrays
- Count Divisors of Factorial
- Maximum calorie
- Prime Factors and their Powers
- Longest Common Substring
- Easy Query
- Count Palindrome Sub-Strings of a String
- Largest Divisibility Test
- Rotate and delete
- Hamiltonian Path
- Sonam Bewafa asks questions
- Count the Number of Full Binary Trees
- Minimums in Array
- 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)
- Replace O's with X's
- Count of AP Subsequences
- 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
- Check Mirror in N-ary tree
- Unit Area of largest region of 1's
- Rearrange characters
- First non-repeating character in a stream
- Kth Smallest Factor
- Count subsequences of type a^i b^j c^k
- Stepping Numbers
- Convex Hull
- 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
- James Bond and Divisors
- Floyd Warshall
- Huffman Encoding
- Nearly Sorted Algorithm
- Infix to Postfix
- Geek collects the balls
- Largest Sum Subarray of Size at least K
- Smallest Positive missing number
- Longest Bitonic subsequence
- Mobile numeric keypad
- Reverse Spiral Form of Matrix
- Maximum sum Rectangle
- Maximum Intervals Overlap
- Minimum Time
- Perfect Sum Problem
- Longest Path in a matrix
- Array Pair Sum Divisibility Problem
- Job Sequencing Problem
- Top k numbers in a stream
- Page Faults in LRU
- Firing employees
- Min cut Square
- Image Multiplication
- N Digit numbers with digits in increasing order
- Rotten Oranges
- Prime factorization and geek number
- Modify array to maximize sum of adjacent differences
- LCS of three strings
- CamelCase Pattern Matching
- Longest Common Prefix in an Array
- Minimum cost to fill given weight in a bag
- Median In a Row-Wise sorted Matrix
- In First But Second
- Mail System Design
- Row with minimum number of 1's
- Numbers with alternative 1's
- Smallest Non-Zero Number
- Count of sum of consecutives
- Coins and Game
- Brackets in Matrix Chain Multiplication
- Matrix Chain Multiplication
- Pairs of Non Coinciding Points
- Maximum Tip Calculator
- Alternate Vowel and Consonant String
- Print N-bit binary numbers having more 1’s than 0’s
- Biconnected Graph
- Killing Spree
- Number of subarrays with maximum values in given range
- Party in Town
- Lazy Pasha
- Longest subarray with sum divisible by K
- Subarrays with equal 1s and 0s
- Make Matrix Beautiful
- Longest Sub-Array with Sum K
- Santa Banta
- The Tiny Miny
- Hopscotch
- Sum of XOR of all pairs
- Save Winterfell
- Marks of PCM
- Pass the semester
- Nitika and her queries
- Geek and Strings
- Container with most water
- Save Gotham!
- The Painter's Partition Problem
- Aditya and his building blocks
- Shreyansh and his bits
- Find the N-th character
- Lucky alive person in a circle
- Element left after performing alternate OR & XOR operation
- Smaller on Left
- A difference of values and indexes
- Possible paths between 2 vertices
- Optimal Strategy For A Game

- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- AVL Tree Insertion
- Maximum subset XOR
- Longest Palindromic Substring in Linear Time
- Alien Dictionary
- AVL Tree Deletion
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST
- Number of Turns in Binary Tree
- Solve the Sudoku
- Minimum Points To Reach Destination
- Minimum sum partition
- Maximum of minimum for every window size
- Head to Tail ordering
- Merge Without Extra Space
- Find sum of different corresponding bits for all pairs
- Return two prime numbers
- Ugly Numbers
- Largest rectangle of 1’s with swapping of columns allowed
- Path of greater than equal to k length
- Create your own Calculator
- Number Formation
- Longest valid Parentheses
- Word Break - Part 2
- Print all LCS sequences
- Minimum Cost Path
- N-Queen Problem
- Solve the Sudoku
- Strongly connected component (Tarjans's Algo)
- Find median in a stream
- Travelling Salesman Problem
- Max Circular Subarray Sum
- Distinct palindromic substrings
- Convert to Strictly increasing array
- Phone directory
- Numbers with one absolute difference
- Count the subarrays having product less than k
- Joey doesn't share food
- Queries on a Matrix
- Bike Racing
- Adventure in a Maze
- Doctor Strange
- Kill Captain America