- Count Leaves in Binary Tree
- Finding middle element in a linked list
- Postorder Traversal
- Minimum element in BST
- Triplet Family
- LCM And GCD
- Searching a number
- Power of 2
- Series GP
- Nth Fibonacci Number
- Dice throw
- Missing number in array
- k largest elements
- Check if a number is power of another number
- Sum of all prime numbers between 1 and N.
- Angle between hour and minute hand
- Reverse array in groups
- Squares in a Matrix
- Find first set bit
- Check if strings are rotations of each other or not

Name

bhupinder kumar

Rank in Institute

#4

Courses Attended

Campus Ambassador

Overall Coding Score: 1713

Monthly Coding Score: 4

Weekly Coding Score: 0

- 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
- Detect Loop in linked list
- Remove duplicates from an unsorted linked list
- Sorted insert for circular linked list
- Reverse a Doubly Linked List
- Insertion Sort
- Merge Sort
- Quick Sort
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Maximum Width of Tree
- Diameter of Binary Tree
- Check for Balanced Tree
- Nth node from end of linked list
- Left View of Binary Tree
- Merge two sorted linked lists
- 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
- DFS of Graph
- 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
- 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
- Remove every k'th node
- Validate an IP Address
- Check if Linked List is Palindrome
- Delete a Node in Single Linked List
- Kth largest element in BST
- Find duplicates in an array
- Count distinct elements in every window
- Sort a stack
- Peak element
- Inorder Successor in BST
- Intersection of Two Linked Lists
- Ancestors in Binary Tree
- Level of a Node in Binary Tree
- Maximum path sum
- Reverse a string using Stack
- Find length of Loop
- Learning Structs
- Delete Array
- Back to Front
- Pair Sum in Vector
- Anagram
- Wave Array
- Rotation
- Search in a Rotated Array
- Non Repeating Character
- Sum of Middle Elements of two sorted arrays
- First Repeating Element
- Reverse words in a given string
- Move all zeroes to end of array
- Activity Selection
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Two numbers with sum closest to zero
- Finding Number
- Next greater number set digits
- Longest Distinct characters in string
- Column name from a given column number
- Maximum Product Subarray
- N meetings in one room
- Remove Duplicates
- Maximum sum increasing subsequence
- Array to BST
- Max Sum without Adjacents
- Key Pair
- Maximum Difference
- Product array puzzle
- Subarray with given sum
- Leaders in an array
- Count number of hops
- Equal to product
- Triplet Sum in Array
- Three Great Candidates
- Overlapping rectangles
- Possible paths
- Minimum element in a sorted and rotated array
- Search in a matrix
- Number Of Open Doors
- 0 - 1 Knapsack Problem
- Maximize The Cut Segments
- Power of Numbers
- Perfect Numbers
- The Nth Fibonnaci
- Equilibrium point
- Floor in a Sorted Array
- Finding the numbers
- Chocolate Distribution Problem
- Maximum Sum Bitonic Subsequence
- 1[0]1 Pattern Count
- Flood fill Algorithm
- Find all pairs with a given sum
- Longest Palindromic Subsequence
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- Common elements
- Element with left side smaller and right side greater
- Transitive closure of a Graph
- Array Subset of another array
- Count the paths
- Four Elements
- Count all possible paths from top left to bottom right
- Stickler Thief
- Count the triplets
- Star elements
- Sum of two large numbers
- Pairs with Positive Negative values
- Numbers containing 1, 2 and 3
- Ease the Array
- Villain Con
- Eulerian Path in an Undirected Graph
- Save Ironman
- 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
- 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
- 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
- Vertical Traversal of Binary Tree
- 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
- Generate IP Addresses
- 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
- LRU Cache
- Box Stacking
- Multiply two strings
- Minimum Swaps to Sort
- Rat in a Maze Problem
- Bipartite Graph
- 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
- Print Nodes having K leaves
- Top View of Binary Tree
- k-th smallest element in BST
- Polynomial Addition
- 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
- K-Sum Paths
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Node at distance
- Leaves to DLL
- Construct Tree from Preorder Traversal
- Convert Level Order Traversal to BST
- Count Number of SubTrees having given Sum
- C++ Generic sort
- Operations on PriorityQueue
- Smallest Positive missing number
- Unique BST's
- Count ways to N'th Stair(Order does not matter)
- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Sum Of Prime
- Rank The Permutations
- 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
- Count of n digit numbers whose sum of digits equals to given sum
- Edit Distance
- nCr
- Maximum Rectangular Area in a Histogram
- Min Coin
- Consecutive 1's not allowed
- Longest Even Length Substring
- Path in Matrix
- Trapping Rain Water
- String formation from substring
- Rank of Matrix
- 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
- Number of paths in a matrix with k coins
- 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 ānā 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
- 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
- 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
- M-Coloring Problem
- Subsequence matching
- Handshakes
- Tic-Tac-Toe
- Number to words
- Palindromic Array
- Betting game
- Is Binary Number Multiple of 3
- Possible groups
- Preorder Traversal and BST
- Card Rotation
- Longest Arithmetic Progression
- Max possible amount
- Bleak Numbers
- Number of pairs
- Coin Piles
- Circle of strings
- Nodes at even distance
- Largest number in K swaps
- Special Matrix
- Minimize the heights
- Next larger element
- nCr mod M | Part 2
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Subsets
- Matchsticks game
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Longest Prefix Suffix
- Kth smallest element
- Divisible by 8
- Transform String
- 3 Divisors
- Longest Common Substring
- Count Palindrome Sub-Strings of a String
- Rotate and delete
- Hamiltonian Path
- 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
- Print leaf nodes from preorder traversal of BST
- 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
- 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
- Minimum number of steps to reach a given number.
- 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
- Maximum sum Rectangle
- Maximum Intervals Overlap
- Perfect Sum Problem
- Array Pair Sum Divisibility Problem
- Job Sequencing Problem
- Page Faults in LRU
- Rotten Oranges
- CamelCase Pattern Matching
- Longest Common Prefix in an Array
- Steps by Knight
- In First But Second
- Row with minimum number of 1's
- Matrix Chain Multiplication
- Maximum Tip Calculator
- Biconnected Graph
- Longest Sub-Array with Sum K
- Container with most water
- Save Gotham!
- The Painter's Partition Problem
- Lucky alive person in a circle

- QuickSort on Doubly Linked List
- Reorder List
- AVL Tree Insertion
- Partition array to K subsets
- Maximum subset XOR
- Longest Palindromic Substring in Linear Time
- Alien Dictionary
- 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
- 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
- Largest rectangle of 1ās with swapping of columns allowed
- Path of greater than equal to k length
- Nth digit of pi
- Assignment Problem
- Rohan's Love for Matrix
- nCr mod M | Part 1
- Number Formation
- Boolean Parenthesization
- Longest valid Parentheses
- Word Break - Part 2
- Print all LCS sequences
- Minimum Cost Path
- N-Queen Problem
- Solve the Sudoku
- Generalised Fibonacci numbers
- Find median in a stream
- Travelling Salesman Problem
- Find the Maximum Flow
- Max Circular Subarray Sum
- Minimum number of elements
- Very Tough Problem
- Distinct palindromic substrings
- Longest Zig-Zag Sub Sequence
- Similar expressions
- Convert to Strictly increasing array
- Phone directory
- Numbers with one absolute difference
- Count the subarrays having product less than k
- Lets play a Game
- Joey doesn't share food
- Rachael's String Challenge
- Queries on a Matrix
- Bike Racing
- Adventure in a Maze
- Closest Palindrome
- Doctor Strange
- Kill Captain America