- Binary String
- Consecutive elements
- Searching a number
- Power of 2
- Pythagorean Triplet
- Nth Fibonacci Number
- Sort a String
- Majority Element
- Amend The Sentence
- Dice throw
- Permutations of a given string
- Parity of unsigned integer
- Missing number in array
- Swap two nibbles in a byte
- Bit Difference
- Greater on right side
- Binary Array Sorting
- Remove character
- Number of occurrence
- k largest elements
- Minimum difference pair
- Check if a number is power of another number
- Pattern Jumping
- Sum of Digits Divisibility
- Ways To Tile A Floor
- Generate Binary Numbers
- Find the Odd Occurence
- Sum of Products
- Set Bits
- Longest Consecutive 1's
- Make a Distinct Digit Array
- Reverse each word in a given string
- Permutations in array
- Sum of dependencies in a graph
- Sort in specific order
- Check if two arrays are equal or not
- Check if string is rotated by two places
- Find first set bit
- Find first repeated character
- Find the element that appears once in sorted array
- Check whether K-th bit is set or not
- Extract Maximum
- Find the smallest and second smallest element in an array
- Gray to Binary and Binary to Gray
- Count pair sum
- First Come First Serve
- Swap and Maximize
- Sort the Half Sorted
- Alternative Sorting
- Rightmost different bit
- Check set bits
- Count Pairs Odd Xor
- Make a Palindrome
- Quick Left Rotation
- Twice counter
- First K natural numbers
- Odd to Even
- Anagram Palindrome
- Smallest number repeating K times
- Remove common characters and concatenate
- Repeated Character
- Merge two strings
- Find the fine
- Maximize ∑arr[i]*i of an Array
- Check if strings are rotations of each other or not
- Game with nos
- Play With OR
- Chocolate lengths
- Factor OR Multiple
- Jay's Apples
- Program for length of the longest word in a sentence
- Riya's Test
- The Number System
- Confused pappu
- Difference series
- Find the Number which contain the digit d
- Gray Code
- Maximum Perimeter of Triangle from array
- Print Linked List elements
- Count nodes of linked list
- Node at a given index in linked list
- Size of Binary Tree
- Inorder Traversal
- Count Leaves in Binary Tree
- Height of Binary Tree
- Finding middle element in a linked list
- Postorder Traversal
- Implement Stack using Linked List
- Implement stack using array
- Implement Queue using Linked List
- Implement Queue using array
- Replace all 0's with 5
- Preorder Traversal
- Implement strstr
- Search a node in BST
- Remainder with 7
- Implement Atoi
- Find Number of Numbers
- Minimum distance between two numbers
- Find triplets with zero sum
- Linked List Insertion
- Minimum element in BST
- Anagram of String
- 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
- Queue Reversal
- Sum of Binary Tree
- Insert in Middle of Linked List
- Count Non-Leaf Nodes in Tree
- Binary String

Name

Rittik Rossan

Institution

Rank in Institute

#1

Courses Attended

Overall Coding Score: 1770

Monthly Coding Score: 500

Weekly Coding Score: 12

- Anagram
- Number of Unique Paths
- Wave Array
- Maximum Gap
- Print Pattern
- Rotation
- Search in a Rotated Array
- Squares in N*N Chessboard
- Palindrome numbers
- Maximize Toys
- Trailing zeroes in factorial
- Non Repeating Character
- Good Pairs
- 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
- Remove “b” and “ac” from a given string
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Finding Number
- Maximum value in a bitonic array
- Next greater number set digits
- Finding Position
- Segregate even and odd nodes in a Linked List
- Count increasing Subarrays
- Element that appears once where every element occurs twice
- Longest Distinct characters in string
- Count distinct pairs with difference k
- Is Square
- Column name from a given column number
- N meetings in one room
- Remove Duplicates
- Kth distance
- Addition of submatrix
- Array to BST
- Facing the sun
- Max Sum without Adjacents
- Key Pair
- Add Binary Strings
- Product array puzzle
- Multiply two polynomals
- Reverse Bits
- 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
- Inorder Traversal and BST
- Segregate 0s and 1s
- Three Great Candidates
- Dearrangement of balls
- Reach a given score
- Overlapping rectangles
- Possible paths
- Minimum element in a sorted and rotated array
- Search in a matrix
- Number Of Open Doors
- Faithful Numbers
- Fibonacci Sum
- Cross the Bridge
- K-Pangrams
- Generate binary string
- Count the Zeros
- 0 - 1 Knapsack Problem
- Longest Common Increasing Subsequence
- Trail of ones
- Left out candies
- Perfect Numbers
- Change Bits
- Permutation with Spaces
- Element appearing once
- Equilibrium point
- Floor in a Sorted Array
- Buildings receiving sunlight
- Count Increasing Subsequences
- Collecting Trees
- Maximize sum after K negations
- LCS with permutations
- Min Number of Flips
- Min sum formed by digits
- Move all negative elements to end
- Maximum 0’s between two immediate 1’s
- Binary Tree K level sum
- Exit Point in a Matrix
- 1[0]1 Pattern Count
- Knapsack with Duplicate Items
- Sum of k smallest elements in BST
- Maximum no of 1's row
- Gold Mine Problem
- Smallest subarray with sum greater than x
- Find largest word in dictionary
- Find all pairs with a given sum
- Largest zigzag sequence
- Temple Offerings
- Increasing Sub Sequence
- Longest Palindromic Subsequence
- Evaluation of Postfix Expression
- Maximum difference Indexes
- Count subsets having distinct even numbers
- Common elements
- Element with left side smaller and right side greater
- Transitive closure of a Graph
- Array Subset of another array
- Karatsuba Algorithm
- Count the paths
- First negative integer in every window of size k
- Paths to reach origin
- Group Anagrams Together
- Sum equals to Sum
- Find Pair Given Difference
- Second most repeated string in a sequence
- Count all possible paths from top left to bottom right
- Shortest Common Supersequence
- Sort the given array after applying the given equation
- Mr Modulo and Pairs
- Sort by Absolute Difference
- Swapping pairs make sum equal
- Break a number
- Minimum insertions to sort an array
- Minimum number of deletions and insertions.
- Minimum number of deletions to make a sorted sequence
- Longest alternating subsequence
- Bitonic Generator Sort
- Count of strings that can be formed using a, b and c under given constraints
- Size of array after repeated deletion of LIS
- Find all distinct subset (or subsequence) sums
- Maximum sum Problem
- Minimum indexed character
- Find number of times a string occurs as a subsequence
- Minimum Cost To Make Two Strings Identical
- Consecutive Array Elements
- Longest Repeating Subsequence
- Even and odd elements at even and odd positions
- Find smallest values of x and y such that ax – by = 0
- Winter is Coming
- Even Fibonacci Numbers Sum
- Maximum possible sum
- Primorial of a number
- Common Subsequence
- Star elements
- Sum of two large numbers
- Prime number of set bits
- Pairs with Positive Negative values
- Numbers containing 1, 2 and 3
- Incomplete Array
- Sum Indexes
- Non-Repeating Element
- Find if string is K-Palindrome or not
- Closing bracket index
- Number of pairs with maximum sum
- Roof Top
- Pairs which are Divisible by 4
- Maximum AND Value
- Find winner of the Game of Nim
- Smallest subarray with all occurrences of a most frequent element
- Arya and The Great War
- Find out the Team
- Check if array contains contiguous integers with duplicates allowed
- Rearrange an array such that arr[i] = i
- Cosmic Number
- Maximum height of the staircase
- C++ Visible Numbers
- Amicable Pair
- String Modification
- Common Divisor
- The Non-repetitive String
- Palindromic Series
- Minimum changes to make all substrings distinct
- Sorting all array elements except one
- Divisor Product
- Lucky Ishaan
- Product of Prime Factors
- Save Ironman
- 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.
- 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
- Remove duplicates from an unsorted linked list
- Sorted insert for circular linked list
- Reverse a Doubly Linked List
- 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
- 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
- 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
- Absolute List Sorting
- Lowest Common Ancestor in a BST
- Implement two stacks in an array
- 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
- Find nth element of spiral matrix
- Max sum in the configuration
- Unique rows in boolean matrix
- Remove every k'th node
- Leaf at same level
- Match specific pattern
- Multiply two linked lists
- Distinct occurrences
- Sorted subsequence of size 3
- Expression Tree
- Check if Linked List is Palindrome
- Max distance between same elements
- Delete a Node in Single Linked List
- Kth largest element in BST
- Find duplicates in an array
- Multiply two polynomials II
- Count distinct elements in every window
- Max Level Sum in Binary Tree
- Special Stack
- Root to leaf paths sum
- Sort a stack
- 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
- Insert in a Sorted List
- Split Singly Linked List Alternatingly
- Ancestors in Binary Tree
- Level of a Node in Binary Tree
- Sum of leaf nodes in BST
- Root to Leaf Paths
- Counting Sort
- Max and min element in Binary Tree
- Perfect Binary Tree
- Reverse a string using Stack
- Linked List that is Sorted Alternatingly
- Full binary tree
- Modify Linked List-1
- Symmetric Tree
- Construct Tree from Inorder & Preorder
- Construct BST from Postorder
- Merge Lists Alternatingly
- Arrange Consonants and Vowels
- 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
- Depth of node
- Maximum Node Level
- Children Sum Parent
- Diagonal Sum In Binary Tree
- Find length of Loop
- Change of Key in BST
- Median of BST
- Normal BST to Balanced BST
- Linked List Matrix
- Reverse First K elements of Queue
- Remove Half Nodes
- Sum of Leaf Nodes
- Sum of Right Leaf Nodes
- Sum of Left Leaf Nodes
- Nodes at Odd Levels
- Brothers From Different Roots
- ZigZag Tree Traversal
- Sum of Leaf Nodes at Min Level
- Move all zeros to the front of the linked list
- Rotate doubly Linked List
- C++ Template
- Magic in CPP
- Two Dimensional World
- Delete Array
- Find the Frequency
- Deque Implementations
- Min Heap implementation
- Reverse words in a given string

- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Sum Of Prime
- Maximum Sub Array
- Print Diagonally
- Overlapping Intervals
- Next Permutation
- Longest Increasing Subsequence
- Parenthesis Checker
- Longest Common Subsequence
- Minimum number of jumps
- Egg Dropping Puzzle
- 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
- 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
- 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
- Relative Sorting
- Black and White
- 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
- 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
- Maximum Sum Path in Two Arrays
- Stock span problem
- Convert an array to reduced form
- Minimum steps to get desired array
- Subsequence matching
- Handshakes
- Tic-Tac-Toe
- Number to words
- Palindromic Array
- Unique partitions
- Is Binary Number Multiple of 3
- Preorder Traversal and BST
- Subsets with XOR value
- Palindromic Strings
- Max possible amount
- Bleak Numbers
- Maximum Profit
- Circle of strings
- Your Social Network
- Special Matrix
- Next larger element
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Distinct Transformations
- Subsets
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Longest Prefix Suffix
- Kth smallest element
- Prime Factors and their Powers
- Longest Common Substring
- Count Palindrome Sub-Strings of a String
- Negative weight cycle
- Hamiltonian Path
- 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)
- Knight Walk
- Print leaf nodes from preorder traversal of BST
- 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
- Water Overflow
- Zero Sum Subarrays
- Smallest window in a string containing all the characters of another string
- Smallest distinct window
- Floyd Warshall
- Nearly Sorted Algorithm
- Longest Bitonic subsequence
- Reverse Spiral Form of Matrix
- Maximum sum Rectangle
- Maximum Intervals Overlap
- Perfect Sum Problem
- Array Pair Sum Divisibility Problem
- Page Faults in LRU
- Image Multiplication
- Rotten Oranges
- Modify array to maximize sum of adjacent differences
- Probability of Knight
- LCS of three strings
- Count digit groupings of a number
- Longest Common Prefix in an Array
- Minimum cost to fill given weight in a bag
- Steps by Knight
- Numbers with alternative 1's
- Brackets in Matrix Chain Multiplication
- Matrix Chain Multiplication
- Alternate Vowel and Consonant String
- Find the last digit when factorial of A divides factorial of B
- Pizza Mania
- Count of Palindromic substrings in an Index range
- Make Matrix Beautiful
- Longest Sub-Array with Sum K
- The Tiny Miny
- Container with most water
- Large Factorials
- Optimal Strategy For A Game
- 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
- 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
- Get minimum element from stack
- Serialize and Deserialize a Binary Tree
- Circular tour
- Max rectangle
- Make Binary Tree From Linked List
- Check if subtree
- Extreme nodes in alternate order
- Kth element in Matrix
- Clone a Binary Tree
- Remove loop in Linked List
- Max length chain
- Largest BST
- Interleaved Strings
- Box Stacking
- Count Palindromic Subsequences
- Minimum Swaps to Sort
- Strongly Connected Components (Kosaraju's Algo)
- Rat in a Maze Problem
- 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
- Print Nodes having K leaves
- Top View of Binary Tree
- k-th smallest element in BST
- Merge Sort on Doubly Linked List
- Binary Tree to CDLL
- Find a pair with given target in BST
- Populate Inorder Successor for all nodes
- 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
- Construct Tree from Preorder Traversal
- Convert Level Order Traversal to BST
- Count Number of SubTrees having given Sum
- C++ Friend function
- C++ Generic sort
- Maximum sum of Non-adjacent nodes
- Unique BST's
- Unit Area of largest region of 1's
- 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)

- Minimum sum partition
- Maximum of minimum for every window size
- Merge Without Extra Space
- Find sum of different corresponding bits for all pairs
- Return two prime numbers
- Ugly Numbers
- Path of greater than equal to k length
- Minimum Cost Path
- Find median in a stream
- Max Circular Subarray Sum
- Distinct palindromic substrings
- Longest Zig-Zag Sub Sequence
- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- AVL Tree Insertion
- Alien Dictionary
- AVL Tree Deletion
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST
- Number of Turns in Binary Tree