skelaf
STREAK
548/1467
days
Longest streak/Global longest streak
Organization
TATA CONSULTANCY SERVICE (TCS)
Language Used
Java, C++, Javascript, Python, C
Coding Score
2802
Problem Solved
838
Contest Rating
__
143 points
Contributor
143 points
Contributor
1 Point
Proficient
Proficient
100 Point
Scholar
Scholar
1k Point
Master
Master
10k Point
Ace
Ace
50k Point
77 submissions in current year
SCHOOL (2)
BASIC (47)
EASY (270)
MEDIUM (439)
HARD (80)
- Reverse alternate nodes in Link List
- Sort a linked list of 0s, 1s and 2s
- Add Number Linked Lists
- Add 1 to a Linked List Number
- Merge 2 sorted linked list in reverse order
- Detect Loop in linked list
- Sorted insert for circular linked list
- Merge Sort
- Quick Sort
- Binary Tree from Inorder and Postorder
- Bottom View of Binary Tree
- Intersection in Y Shaped Lists
- Diameter of a Binary Tree
- Heap Sort
- Merge two sorted linked lists
- Delete a node from BST
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- Absolute List Sorting
- Two Stacks in an Array
- Max sum path in two arrays
- Largest subarray with 0 sum
- Topological sort
- Vertical Tree Traversal
- Find kth element of spiral matrix
- Max sum in the configuration
- Serialize and deserialize a binary tree
- Linked List to Binary Tree
- Check if subtree
- Kth element in Matrix
- Validate an IP Address
- Remove loop in Linked List
- Dijkstra Algorithm
- Minimum Spanning Tree
- Additive sequence
- Sorted subsequence of size 3
- Multiply two strings
- Implement Atoi
- Palindrome Linked List
- Print matrix in diagonal pattern
- Closest in BST
- BST with Dead End
- Find triplets with zero sum
- Duplicate Subtree
- Top View of Binary Tree
- Find Common Nodes in two BSTs
- Union of Two Linked Lists
- Euler Circuit in an Undirected Graph
- Euler circuit and Path
- Binary Tree to CDLL
- Mountain Subarray Problem
- Pair Sum in BST
- Root to Leaf Paths
- Counting elements in two arrays
- Linked List that is Sorted Alternatingly
- K Sum Paths
- Leftmost and rightmost nodes of binary tree
- Arrange Consonants and Vowels
- Count the nodes at distance K from leaf
- Vertical sum
- Isomorphic Trees
- Predecessor and Successor
- Children Sum in a Binary Tree
- Diagonal sum in binary tree
- Normal BST to Balanced BST
- Sum of nodes on the longest path
- Kth Ancestor in a Tree
- ZigZag Tree Traversal
- Mother Vertex
- Gray to Binary equivalent
- Smallest Positive Missing
- Power Of Numbers
- Maximum occured integer
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Maximum Index
- Stock buy and sell
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Count Inversions
- Two Repeated Elements
- Smallest Positive missing number
- Union of 2 Sorted with Duplicates
- Indexes of Subarray Sum
- Triplet Sum in Array
- Merge Without Extra Space
- Level of Nodes
- Make Matrix Beautiful
- Boolean Matrix
- Spirally traversing a matrix
- Determinant of a Matrix
- Subarray with 0 sum
- Longest Consecutive Subsequence
- Case-specific Sorting of Strings
- K Sized Subarray Maximum
- Activity Selection
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Platforms
- Combination Sum
- Detect Cycle using DSU
- Stickler Thief
- Optimal Strategy For A Game
- Sum of all substrings of a number
- Longest Increasing Subsequence
- Longest Common Subsequence
- Lucky Numbers
- Zero Sum Subarrays
- Kth Smallest
- Implement Trie
- Shortest Common Supersequence
- Nth Catalan Number
- Container With Most Water
- Convert Integer to English Word
- Top K Frequent in Array
- Closest Three Sum
- Word Break
- Stock Buy and Sell – Multiple Transaction Allowed
- Word Search
- 4 Sum - All Quadruples
- Sort 0s, 1s and 2s
- Paths to reach origin
- Maximum Sub Array
- Pascal Triangle
- Maximum Index
- Number of subarrays with maximum values in given range
- Flip Bits
- Sum of Subarrays
- Top k numbers in a stream
- Consecutive 1's not allowed
- Count of Subarrays
- Pythagorean Triplet
- Painting the Fence
- Search in Rotated Sorted Array
- Sum of bit differences
- Count Full Binary Trees
- Max Score from Subarray Mins
- Form the Largest Number
- Add Binary Strings
- Maximum Product Subarray
- Longest subarray with sum divisible by K
- Check if a string is repetition of its substring of k-length
- Row with max 1s
- Swapping pairs make sum equal
- Check if frequencies can be equal
- Column name from a given column number
- Substrings with K Distinct
- Palindrome SubStrings
- Nuts and Bolts Problem
- Cutting Binary String
- Max Sum without Adjacents
- Factorials of large numbers
- Shuffle integers
- Find the N-th character
- k largest elements
- Sum of XOR of all pairs
- Longest substring with distinct characters
- Longest Substring with K Uniques
- Longest Palindrome in a String
- Arranging the array
- Triplets with Smaller Sum
- Rod Cutting
- K closest elements
- Maximize the sum of selected numbers from a sorted array to make it empty
- LCS of three strings
- Longest Palindromic Subsequence
- Largest Sum Subarray of Size at least K
- Equalize the Towers
- Minimum sum
- Minimize the Heights II
- Transform to prime
- First and Last Occurrences
- Minimum Deletions
- A difference of values and indexes
- Print N-bit binary numbers having more 1s than 0s
- Nine Divisors
- Find patterns
- Permutations of a String
- Number following a pattern
- CamelCase Pattern Matching
- Lexicographically smallest string
- Sum of Products
- Subarrays Product Less than K
- Unique Number II
- Bleak Numbers
- Modular Exponentiation for large numbers
- Game of XOR
- Largest prime factor
- Maximum Tip Calculator
- Modified Game of Nim
- Maximize dot product
- Max Sum Increasing Subsequence
- Minimum cost to fill given weight in a bag
- Coin Change (Count Ways)
- Sequence of Sequence
- Santa Banta
- String Subsequence
- Mobile numeric keypad
- Gold Mine Problem
- Dice throw
- Perfect Sum Problem
- Trail of ones
- Shreyansh and his bits
- K-Palindrome
- Longest subsequence-1
- Power Set
- Minimum Cost To Make Two Strings Identical
- Knapsack with Duplicate Items
- nCr
- Geek and its Game of Coins
- Minimum steps to destination
- Partition Equal Subset Sum
- Longest Bitonic subsequence
- Count possible ways to construct buildings
- Count digit groupings of a number
- Array Pair Sum Divisibility Problem
- Magic Triplets
- Fill up buckets
- Matchsticks game
- Subset Sums
- Unique partitions
- Prime Pair with Target Sum
- Akku and Binary Numbers
- Number of paths
- Stepping Numbers
- Number of paths in a matrix with k coins
- LCM Triplet
- Jumping Numbers
- A Game of LCM
- Game with String
- Count even length
- Grouping Of Numbers
- Find the Safe Position
- Smith Number
- Next Permutation
- Missing number in matrix
- Maximum sum of hour glass
- Filling Bucket
- How Many X's?
- Power of k in factorial of n
- Exit Point in a Matrix
- Longest Repeating Subsequence
- Rotate Each Row of Matrix K Times
- Decode the string
- Total Decoding Messages
- Stream First Non-repeating
- Maximum Sub-String after at most K changes
- Check If two Line segments Intersect
- Print leaf nodes from preorder traversal of BST
- Number of Rectangles in a Circle
- Longest Perfect Piece
- Integral Points Inside Triangle
- Geek and Strings
- The Smurfs
- Satisfy the equation
- Transitive closure of a Graph
- Replace O's with X's
- Two numbers with odd occurrences
- Rohan's Love for Matrix
- Express as sum of power of natural numbers
- Traverse All Edges And Vertices
- Find the string in grid
- Count the paths
- Floyd Warshall
- Techfest and the Queue
- Largest subsquare surrounded by X
- Shortest Source to Destination Path
- Divisibility tree
- Base Equivalence
- Maximum sum Rectangle
- Reverse Spiral Form of Matrix
- Police and Thieves
- Save Your Life
- Hamiltonian Path
- Search Pattern (Rabin-Karp Algorithm)
- All Palindromic Partitions
- Subarrays with sum K
- Coin Piles
- Remove K Digits
- Substrings of length k with k-1 distinct elements
- Maximum XOR of two numbers in an array
- Construct list using given q XOR queries
- Prefix match with other strings
- Find duplicate rows in a binary matrix
- Single valued subtree
- Maximum sum of elements not part of LIS
- Find rectangle with corners as 1
- Paths from root with a specified sum
- Shortest Prime Path
- Insertion Sort for Singly Linked List
- Minimize the Heights I
- Flatten binary tree to linked list
- Anti Diagonal Traversal of Matrix
- Unique Number III
- All Unique Permutations of an array
- Course Schedule
- Clone an Undirected Graph
- Remove and Reverse
- Find k-th smallest element in given n ranges
- Even Swap
- Reverse a Stack
- Maximum Meetings in One Room
- Enemy
- Max Equal sum of 3 Stacks
- Buy Maximum Stocks
- Exactly one swap
- Array Removals
- Find shortest safe route in a matrix
- Largest subtree sum in a tree
- Wine Buying and Selling
- Graph is Tree or Not
- Replace every element with the least greater element on its right
- Next element with greater frequency
- Construct Binary Tree from String with bracket representation
- Check if all levels of two trees are anagrams or not
- Number of Distinct Islands
- Shortest Distance in a Binary Maze
- Minimum Multiplications to reach End
- Number Of Enclaves
- Eventual Safe States
- City With the Smallest Number of Neighbors at a Threshold Distance
- Alex Travelling
- Number Of Islands
- Path With Minimum Effort
- Shortest path in Directed Acyclic Graph
- Majority Element - More Than n/3
- Sum of Beauty of All Substrings
- Koko Eating Bananas
- Sum of subarray minimum
- Asteroid Collision
- Aggressive Cows
- Smallest Divisor
- Combination Sum II
- Task Scheduler
- Hands of Straights
- Minimum Absolute Difference In BST
- Lemonade Change
- Maximum Sum Combination
- Partitions with Given Difference
- Floor in BST
- Largest Divisible Subset
- GCD Array
- Minimize number of Students to be removed
- Maximum Value
- Shortest Prime Path
- Flattening a Linked List
- Absolute difference divisible by K
- Make array elements unique
- Next Greater Element in Circular Array
- Carpet into Box
- Minimum X (xor) A
- Geeks And The String
- Find the longest string
- Maximum Profit By Choosing A Subset Of Intervals
- Minimum repeat to make substring
- Paint N House
- Max Sum without Adjacents
- Intersection Point in Y Shaped Linked Lists
- BST Downward Traversal
- Length of the longest subarray with positive product
- Count number of free cell
- Maximum Bipartite Matching
- Minimum Days
- Prime List
- Walls Coloring
- Water the plants
- Geeks Island
- Apple Sequences
- Connect Nodes at Same Level
- Unique Paths in a Grid
- Valid Compressed String
- Fill the Matrix
- Number of Good Components
- Optimal Array
- Best Node
- Update Queries
- Good Stones
- Maximum Intersecting Lines
- String rp or pr
- Knight in Geekland
- Shy Geek
- Count Special Numbers
- Minimum Steps Required
- Count Cyclic Paths
- Maximum Triplet product
- Second smallest number
- Special Palindrome Substrings
- Maximum Possible Value
- Distinct Difference
- Anagrams in Linked List
- Yet another query problem
- Geek hates too many 1s
- Maximum Length
- Remove the balls
- Unequal Arrays
- Job Sequencing Problem
- Bheem Wants Ladoos
- Prefix Suffix String
- Smaller Sum
- Shortest XY distance in Grid
- BST Maximum Difference
- Nearest smaller tower
- Another Coin Change Problem
- Geek's Village and Wells
- Find Number
- Powerful Integer
- Max Coins
- Good Subtrees
- Subtree In N-ary Tree
- Easy Task
- Add Minimum Characters
- Maximum subset sum
- Palindrome with minimum sum
- Count Total Setbits
- Tree Transformation
- Construct a Full Binary Tree
- Modify Linked List-1
- Find Kth permutation
- Fraction pairs with sum 1
- New Year Resolution
- Grinding Geek
- Flatten BST to sorted list
- Minimize the Difference
- Pairs violating the BST property
- Kth common ancestor in BST
- Set Matrix Zeros
- Last Moment Before All Ants Fall Out
- Longest Subarray with Majority Greater than K
- Balancing Consonants and Vowels Ratio
- Subarrays With At Most K Distinct Integers
- Divisible by 13
- Lexicographically Largest String After K Deletions
- Group Balls by Sequence
- Count Unique Vowel Strings
- ASCII Range Sum
- 2D Difference Array
- Difference Check
- Valid String
- Class Test
- Reverse a linked list
- Pairwise swap elements of a linked list
- Delete nodes having greater value on right
- Remove duplicates from an unsorted linked list
- Delete in a Doubly Linked List
- Reverse a Doubly Linked List
- Insertion Sort
- Check for BST
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Delete without head pointer
- Height of Binary Tree
- Balanced Tree Check
- Kth from End of Linked List
- Middle of a Linked List
- Check If Circular Linked List
- Left View of Binary Tree
- Delete Middle of Linked List
- Decimal Equivalent of Binary Linked List
- Intersection Sorted Linked Lists
- Find Transition Point
- Queue using two Stacks
- Remove Duplicates from a Sorted Linked List
- Level Order in spiral form
- Reverse Level Order Traversal
- DFS of Graph
- Stack using Linked List
- Insert a node in a BST
- BFS of graph
- Identical Trees
- Square Root
- Nodes without a Sibling
- Lowest Common Ancestor in a BST
- Binary Search
- Run Length Encoding
- Print all possible strings
- Remove duplicates in array
- Binary Tree to BST
- Unique rows in boolean matrix
- Toeplitz matrix
- Remove every k'th node
- Leaves at Same Level or Not
- Third largest element
- Convert to Roman No
- You and your books
- Generate Grey Code Sequences
- Delete in a Singly Linked List
- Kth largest element in BST
- Minimum distance in an Array
- Array Duplicates
- Three way partitioning
- String Modification
- Level order traversal
- Inorder Successor in BST
- Index of an Extra Element
- Insert in a Sorted List
- Sum of leaf nodes in BST
- More than n/k Occurrences
- Symmetric Tree
- Delete Alternate Nodes
- Find the Sum of Last N nodes of the Linked List
- Count Pairs whose sum is equal to X
- Median of BST
- Leaf under budget
- Queue Reversal
- Reverse first K of a Queue
- Closest Neighbour in BST
- Brothers From Different Roots
- Delete Mid of a Stack
- Start Coding - Java
- Precise Format - Java
- Swap the array elements
- Predict the Column
- Xoring and Clearing
- Reverse an Array
- Frequency in Queue
- Operations on PriorityQueue
- Frequency Game
- Max and Second Max
- First Set Bit
- Rightmost different bit
- K-th Bit is Set or Not
- Power of 2
- Wave Array
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Floor in a Sorted Array
- Print adjacency list
- Sum of upper and lower triangles
- Print Matrix in snake Pattern
- Transpose of Matrix
- Matrix Boundary Traversal
- Anagram
- Winner of an election
- String Rotated by 2 Places
- Strings Rotations of Each Other
- Isomorphic Strings
- Reverse Words
- Panagram Checking
- Non Repeating Character
- K largest elements
- Minimum Cost of ropes
- Reach a given score
- Count ways to N'th Stair
- Count number of hops
- First Repeating Element
- Union of Arrays with Duplicates
- Check Equal Arrays
- Missing in Array
- Product array puzzle
- Needle in a Haystack
- Roman Number to Integer
- Compare Version Number
- Search an element in sorted and rotated array
- Intersection of Arrays with Distinct
- Max Value Permutation
- Count the elements
- Find the closest number
- Adding Ones
- Common in 3 Sorted Arrays
- Move All Zeroes to End
- String Duplicates Removal
- Minimize the sum of product
- Chocolate Distribution Problem
- Count pairs Sum in matrices
- Find Pair Given Difference
- Permutations in array
- Swap and Maximize
- Bitonic Point
- Left most and right most index
- Alternate Positive Negative
- Remove Consecutive Characters
- Palindrome Sentence
- Second Largest
- Convert array into Zig-Zag fashion
- Two Sum - Pair with Given Sum
- Rotate Bits
- Find all pairs with a given sum
- Number of occurrence
- K-Pangrams
- Reversing the equation
- Does array represent Heap
- Convert an array to reduced form
- Find missing in second array
- String's Count
- Longest Common Prefix of Strings
- First Repeated Character
- Two sum -Pairs with 0 Sum
- Play With OR
- At Least K Occurrences
- Find the closest pair from two arrays
- Palindrome String
- Total count
- Search array with adjacent diff at most k
- Fitting The Array
- Print Bracket Number
- Odd Even Problem
- Binary representation of next number
- Is Binary Number Multiple of 3
- Padovan Sequence
- Extract the Number from the String
- Minimum Operations
- Divisibility by 8
- Number of 1 Bits
- Find the Highest number
- Armstrong Numbers
- Reverse Bits
- Max Sum Subarray of size K
- Nth Fibonacci Number
- Swap two nibbles in a byte
- Copy Set Bits in Range
- Maximum Sum Problem
- Party of Couples
- Shortest path from 1 to n
- Sum 1 to n Divisors
- Count numbers containing 4
- The Bit Game
- Reach the Nth point
- Minimum number of Coins
- Number Of Open Doors
- Break a number
- Perfect Numbers
- Largest number possible
- Recamans sequence
- The Palindrome Pattern
- Compare two fractions
- Trailing zeroes in factorial
- Form a number divisible by 3 using array digits
- Least Prime Factor
- Sum of First N Natural Numbers
- Recursive sequence
- Juggler Sequence
- Tom and Jerry
- Summed Matrix
- Maximum Diamonds
- Arithmetic Number
- Row with Minimum 1s
- Surround the 1's
- Coverage of all Zeros in a Binary Matrix
- Help Ishaan
- Trace Path
- Inorder Traversal and BST
- Sequence Fun
- Letters Collection
- Print Pattern
- Primes sum
- Chicks in a Zoo
- Check if it is possible to convert one string into another with given constraints
- Earthquake and the Paint Shop
- Array to BST
- Sum of dependencies in a graph
- Count all possible paths from top left to bottom right
- Modified Numbers and Queries
- Print Diagonally
- Find maximum volume of a cuboid
- Minimum steps to make product equal to one
- Maximum number of 2X2 squares
- Count the Substrings
- The Ultimate Duel
- The Final Task
- Smallest window containing 0, 1 and 2
- Move Last Element to Front of a Linked List
- Insert an Element at the Bottom of a Stack
- Fibonacci series up to Nth term
- Stock Buy and Sell – Max one Transaction Allowed
- Maximum Depth Of Binary Tree
- Divisor Game
- Minimize the sum
- Last modified ball
- Transform to Sum Tree
- Parent of Max GCD Siblings in a Binary Tree
- Find the first node of loop in linked list
- Maximum Weight Node
- Type it!
- Min operations
- Last cell in a Matrix
- Balloon Everywhere
- Reverse both parts
- Cutting Rectangles
- Frogs and Jumps
- Make Array Elements Equal
- Equal Left and Right Subarray Sum
- Make the array beautiful
- Remainder on dividing by 11
- Is it Fibonacci
- Taxi Booking
- Max Level Sum in Binary Tree
- Binary matrix having maximum number of 1s
- Number of Subarrays of 0's
- Maximum Identical Bowls
- Bus Conductor
- Wifi Range
- Minimum Number
- Minimum Integer
- Seating Arrangement
- String Mirror
- Powerfull Integer
- Make Palindrome
- Binary Modulo
- Total Cuts
- Bit Magic
- Array Operations
- Dominant Pairs
- Total Traversal Time
- Ticket Counter
- Unique Number of Occurrences
- Linked List Group Reverse
- Reorder List
- Min distance between two given nodes of a Binary Tree
- Max rectangle
- Subtraction in Linked List
- Distinct occurrences
- AVL Tree Insertion
- AVL Tree Deletion
- Merge Sort on Doubly Linked List
- Nodes at given distance in binary tree
- String Permutations
- Trapping Rain Water
- Max Circular Subarray Sum
- Solve the Sudoku
- Median of 2 Sorted Arrays of Different Sizes
- Burning Tree
- Merge Without Extra Space
- Next Smallest Palindrome
- Count Pairs in an Array
- Search Pattern (KMP-Algorithm)
- Number of distinct subsequences
- Wildcard string matching
- Longest repeating and non-overlapping substring
- Sum-string
- Edit Distance
- Minimum Points To Reach Destination
- Minimum sum partition
- Number Formation
- Palindromic Partitioning
- Next Happy Number
- Matrix Chain Multiplication
- Strictly Increasing Array
- Median in a row-wise sorted Matrix
- Generalised Fibonacci numbers
- Boolean Parenthesization
- Possible Paths in a Tree
- Brackets in Matrix Chain Multiplication
- Phone directory
- Assignment Problem
- Huffman Encoding
- Find all Critical Connections in the Graph
- Distribute candies in a binary tree
- Split Array Largest Sum
- Find number of closed islands
- Scrambled String
- Find the String
- Maximum Number of Toys
- Stock Buy and Sell – Max 2 Transactions Allowed
- Min Chars to Add for Palindrome
- Largest rectangular sub-matrix whose sum is 0
- Vertex Cover
- Expression Add Operators
- MaxSkill
- Minimize Max Distance to Gas Station
- Candy
- Account Merge
- Better String
- Count Lucky Permutations
- Count the Substring
- Select Nodes
- Largest Sum Cycle
- Fixing Two swapped nodes of a BST
- Shortest Path Using Atmost One Curved Edge
- Avoid Explosion
- Walls Coloring II
- Redundant Parenthesis
- Partition the Array
- Count Binary Strings With No Consecutive 1s
- Divide in Incremental Groups
- Max min Height
- Maximum Number of coins
- Median of the Subarrays
- Minimum BST Sum Subtree
- Special Digits
- Cake Distribution Problem
- Min Time
- Game Of Subsets
- Geekina Hate 1s
- Making A Large Island
- Count the Coprimes
- Count Linked List Nodes
- Implement stack using array
- Queue Using Array
- Replace all 0's with 5
- First Occurence
- Search a node in BST
- Palindromic Array
- Peak element
- Minimum element in BST
- Anagram of String
- Is Linked List Length Even?
- Identical Linked Lists
- Insert in Middle of Linked List
- Sum of diagonals
- Decimal to binary
- Reverse array in groups
- Binary Array Sorting
- Binary String
- Reverse a String
- First n Fibonacci
- Binary Array Sorting
- At least two greater elements
- Value equal to index value
- Uncommon characters
- Find element at a given Index
- Largest Element in Array
- Rotate Array by One
- Array Subset
- Count of smaller elements
- Min and Max in Array
- Addition of Two Numbers
- Odd or Even
- Java Hello World
- Mean of an Array
- Sum Of Digits
- Sum of Digit is Palindrome or not
- Java 1-d and 2-d Array
- The dice problem
- G.F Series
- Matching Pair
- Swap two numbers
- The Lazy Caterer's Problem
- Sum of product of x and y with floor(n/x) = y
- nPr
- Java Iterator
- Sorted matrix
- Max Min
We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our Cookie Policy & Privacy Policy