- Inorder Traversal
- Bubble Sort
- Count Leaves in Binary Tree
- Selection Sort
- Height of Binary Tree
- Postorder Traversal
- Implement Stack using Linked List
- Implement stack using array
- Implement Queue using Linked List
- Implement Queue using array
- Square root
- Binary Search
- Print all possible strings
- Replace all 0's with 5
- Implement Atoi
- Find triplets with zero sum
- Play with an array
- Minimum element in BST
- Maximum in Struct Array
- Triplet Family
- LCM And GCD
- Power of 2
- Sort The Array
- Doubling the value
- Sieve of Eratosthenes
- Rotate Array
- Permutations of a given string
- Check if the number is Fibonacci
- Missing number in array
- Swap two nibbles in a byte
- Maximum product of two numbers
- Number of paths
- Count total set bits
- Greater on right side
- Immediate Smaller Element
- Sum of distinct elements
- Binary Array Sorting
- Convert array into Zig-Zag fashion
- Remove character
- Number of occurrence
- k largest elements
- Minimum difference pair
- Check if a number is power of another number
- Find position of set bit
- Pattern Jumping
- Maximum money
- Ways To Tile A Floor
- Generate Binary Numbers
- Find the Odd Occurence
- Keypad typing
- Searching an element in a sorted array
- Set Bits
- Subset Sums
- Longest Consecutive 1's
- Count Squares
- Make a Distinct Digit Array
- Sort in specific order
- Check if two arrays are equal or not
- Tidy Number
- Geek and Coffee Shop
- Find the element that appears once in sorted array
- Thief trying to escape
- Last index of One
- Max Sum Subarray of size K
- Check set bits
- Sorting Employees
- Shuffle integers
- Elements in the Range
- Count triplets with sum smaller than X
- Total number of Strings
- Find the Highest number
- First and last occurrences of X
- Positive and negative elements
- G.F Series
- Find the fine
- Maximize ∑arr[i]*i of an Array
- Message Spreading
- Ishaan Loves Chocolates
- How Many X's?

Name

Abhishek Goyal

Institution

Rank in Institute

#25

Campus Ambassador

Overall Coding Score: 1323

Monthly Coding Score: 0

Weekly Coding Score: 0

- Reverse a linked list
- Pairwise swap elements of a linked list
- Given a linked list of 0s, 1s and 2s, sort it.
- Add 1 to a number represented as linked list
- 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
- 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
- Transform to Sum Tree
- 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
- BFS of graph
- Lowest Common Ancestor in a Binary Tree
- Determine if Two Trees are Identical
- Absolute List Sorting
- Lowest Common Ancestor in a BST
- Implement two stacks in an array
- Largest subarray of 0's and 1's
- 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
- Equilibrium index of an array
- Match specific pattern
- Distinct occurrences
- Josephus problem
- Expression Tree
- Check if Linked List is Palindrome
- Kth largest element in BST
- Max Level Sum in Binary Tree
- Special Stack
- Root to leaf paths sum
- Sort a stack
- Level order traversal
- Peak element
- Inorder Successor in BST
- Delete nodes greater than k
- Index Of an Extra Element
- Merge Sort for Linked List
- Convert Ternary Expression to Binary Tree
- Union of Two Linked Lists
- Intersection of Two Linked Lists
- Ancestors in Binary Tree
- Level of a Node in Binary Tree
- Root to Leaf Paths
- Counting Sort
- Counting elements in two arrays
- Full binary tree
- Symmetric Tree
- Vertical sum
- Count Pairs whose sum is equal to X
- Children Sum Parent
- Normal BST to Balanced BST
- Delete middle element of a stack
- Matrix Interchange
- Find the Frequency
- Min Heap implementation
- Reverse words in a given string
- Minimum indexed character
- Frequencies of Limited Range Array Elements
- Anagram
- Number of Unique Paths
- Print Pattern
- Search in a Rotated Array
- Squares in N*N Chessboard
- Palindrome numbers
- Magic Number
- Maximize Toys
- Trailing zeroes in factorial
- Non Repeating Character
- Count Occurences of Anagrams
- Reverse words in a given string
- Move all zeroes to end of array
- Remove all duplicates from a given string
- Activity Selection
- Remove “b” and “ac” from a given string
- Sort an array of 0s, 1s and 2s
- Two numbers with sum closest to zero
- Maximum value in a bitonic array
- Finding Position
- Single Number
- Segregate even and odd nodes in a Linked List
- Element that appears once where every element occurs twice
- Column name from a given column number
- N meetings in one room
- Addition of submatrix
- Maximum sum increasing subsequence
- Facing the sun
- Triangular Number
- Key Pair
- Maximum Difference
- Product array puzzle
- Reverse Bits
- Count Smaller elements
- Reach the Nth point
- Subarray with given sum
- Adjacents are not allowed
- Leaders in an array
- Count number of hops
- Count pairs with given sum
- Save Knights
- Triplet Sum in Array
- Reach a given score
- Minimum element in a sorted and rotated array
- Search in a matrix
- Number Of Open Doors
- Number of 1's in smallest repunits
- Count the Zeros
- 0 - 1 Knapsack Problem
- Trail of ones
- Valid Substring
- Tom and Jerry
- Game of Death in a circle
- Final Destination
- Perfect Numbers
- The Nth Fibonnaci
- Permutation with Spaces
- Element appearing once
- Equilibrium point
- Finding the numbers
- Minimum Energy
- Equal 0, 1 and 2
- Min Number of Flips
- Min sum formed by digits
- Maximum Sum Bitonic Subsequence
- Knapsack with Duplicate Items
- Flood fill Algorithm
- Roman Number to Integer
- Maximum no of 1's row
- Friends Pairing Problem
- Decode the string
- Game of XOR
- Find Nth root of M
- Find largest word in dictionary
- Sum of all substrings of a number
- Minimum Operations
- Meta Strings
- Numbers with same first and last digit
- Temple Offerings
- Largest Fibonacci Subsequence
- Increasing Sub Sequence
- Longest Palindromic Subsequence
- Evaluation of Postfix Expression
- Common elements
- Recursive sequence
- Rod Cutting
- Element with left side smaller and right side greater
- Array Subset of another array
- First negative integer in every window of size k
- Four Elements
- Paths to reach origin
- Subarray with 0 sum
- Group Anagrams Together
- Find Pair Given Difference
- Second most repeated string in a sequence
- Count all possible paths from top left to bottom right
- Minimum Deletions
- Shortest Common Supersequence
- Sort the given array after applying the given equation
- Rearrange a string
- Number of Groups
- Swapping pairs make sum equal
- Toppers Of Class
- Count the number of ways to tile the floor of size n x m using 1 x m size tiles
- Minimum steps to minimize n as per given condition
- Jumping Caterpillars
- Find all distinct subset (or subsequence) sums
- Longest subsequence-1
- Maximum sum Problem
- Minimum indexed character
- Minimum Cost To Make Two Strings Identical
- Longest Repeating Subsequence
- Stickler Thief
- Sum of Lengths of Non-Overlapping SubArrays
- Count the triplets
- Prime number of set bits
- Next Happy Number
- Find if string is K-Palindrome or not
- Pairs which are Divisible by 4
- Check if array contains contiguous integers with duplicates allowed
- Maximum height of the staircase
- Counts Zeros Xor Pairs
- C++ Matrix Rotation by 180 degree
- Swap every two bits in bytes
- Maximum sum of increasing order elements from n arrays
- Smallest number with sum of digits as N and divisible by 10^N
- Smallest greater elements in whole 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.
- Quick Sort on Linked List
- Count BST nodes that lie in a given range
- Check for BST
- 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
- 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
- Min distance between two given nodes of a Binary Tree
- The Celebrity Problem
- 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
- Make Binary Tree From Linked List
- Extreme nodes in alternate order
- Clone a Binary Tree
- Remove loop in Linked List
- Max length chain
- Interleaved Strings
- LRU Cache
- Box Stacking
- Count Palindromic Subsequences
- Rat in a Maze Problem
- Pots of Gold Game
- Delete keys in a Linked list
- Merge two BST 's
- Merge k Sorted Arrays
- Top View of Binary Tree
- k-th smallest element in BST
- Merge Sort on Doubly Linked List
- Occurences of 2 as a digit
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Leaves to DLL
- Construct Tree from Preorder Traversal
- Count Number of SubTrees having given Sum
- Smallest Positive missing number
- Unique BST's
- Unit Area of largest region of 1's
- Sorting Elements of an Array by Frequency
- Longest consecutive subsequence
- Count ways to N'th Stair(Order does not matter)
- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Excel Sheet | Part - 1
- Maximum Sub Array
- Print Diagonally
- 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
- Edit Distance
- Maximum Rectangular Area in a Histogram
- Consecutive 1's not allowed
- Count of Subarrays
- Longest Even Length Substring
- Path in Matrix
- Trapping Rain Water
- Subset Sum Problem
- Maximize The Array
- 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
- Longest Palindrome in a String
- Modular Exponentiation for large numbers
- Rearrange Array Alternately
- Relative Sorting
- Black and White
- Maximum of all subarrays of size k
- Largest square formed in a matrix
- 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
- Length of the longest substring
- Smallest number on left
- Longest consecutive subsequence
- Stock span problem
- Convert an array to reduced form
- Handshakes
- Tic-Tac-Toe
- Palindromic Array
- Is Binary Number Multiple of 3
- Longest Arithmetic Progression
- Max possible amount
- Bleak Numbers
- Maximum Profit
- Digit multiplier
- Special Matrix
- Next larger element
- Taking 1 out of 3 consecutives
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Distinct Transformations
- Word Break
- Longest Prefix Suffix
- Kth smallest element
- Longest Common Substring
- Count Palindrome Sub-Strings of a String
- Snake and Ladder Problem
- Shortest Source to Destination Path
- Knight Walk
- Distance of nearest cell having 1
- Is Sudoku Valid
- Find whether path exist
- 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
- K
^{th}largest element in a stream - Water Overflow
- Zero Sum Subarrays
- Nearly Sorted Algorithm
- Longest Bitonic subsequence
- Maximum Intervals Overlap
- Minimum Time
- Array Pair Sum Divisibility Problem
- Rotten Oranges
- LCS of three strings
- Minimum cost to fill given weight in a bag
- Steps by Knight
- In First But Second
- Coins and Game
- Matrix Chain Multiplication
- Print N-bit binary numbers having more 1’s than 0’s
- Count of Palindromic substrings in an Index range
- Save Gotham!
- The Painter's Partition Problem
- Optimal Strategy For A Game

- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- Fixing Two nodes of a BST
- Solve the Sudoku
- Minimum Points To Reach Destination
- Minimum sum partition
- Merge Without Extra Space
- Return two prime numbers
- Allocate minimum number of pages
- A Simple Fraction
- Ugly Numbers
- Largest rectangle of 1’s with swapping of columns allowed
- Boolean Parenthesization
- Longest valid Parentheses
- Word Break - Part 2
- 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