Data Structure
Java
Python
HTML
Interview Preparation
- Tutorials
- Courses
- Tracks
ashwin_56
STREAK
412/1553
days
Longest streak/Global longest streak
Language Used
Java, C++, Python
Coding Score
1601
Problem Solved
427
Contest Rating
__
387 submissions in current year
SCHOOL (0)
BASIC (17)
EASY (107)
MEDIUM (252)
HARD (51)
- Count Linked List Nodes
- Inorder Traversal
- Postorder Traversal
- Doubly linked list Insertion at given position
- Preorder Traversal
- Peak element
- Linked List Insertion At End
- Is Linked List Length Even?
- Triplet Family
- Print 1 To N Without Loop
- Sorted Array Search
- Alternative Sorting
- Largest Element in Array
- Array Subset
- Sum of first n terms
- Count Squares
- Repetitive Addition Of Digits
- Reverse a linked list
- Occurence of an integer in a Linked List
- Pairwise swap elements of a linked list
- Delete in a Doubly Linked List
- Reverse a Doubly Linked List
- Bubble Sort
- Selection Sort
- Insertion Sort
- Check for BST
- Mirror Tree
- Height of Binary Tree
- Middle of a Linked List
- Left View of Binary Tree
- Intersection Sorted Linked Lists
- Level Order in spiral form
- DFS of Graph
- BFS of graph
- Lowest Common Ancestor in a BST
- Binary Search
- Largest subarray of 0's and 1's
- Remove duplicates in array
- Multiply two linked lists
- Max distance between same elements
- Count distinct elements in every window
- Level order traversal
- Insert in a Sorted List
- Split Linked List Alternatingly
- Symmetric Tree
- Delete Alternate Nodes
- Find the Sum of Last N nodes of the Linked List
- Find length of Loop
- Linked List Matrix
- Queue Reversal
- Closest Neighbour in BST
- Reverse an Array
- Frequencies in a Limited Array
- Equilibrium Point
- Array Leaders
- Floor in a Sorted Array
- Roof Top
- Rotate by 90 degree
- Anagram
- Strings Rotations of Each Other
- Reverse Words
- Non Repeating Character
- Parenthesis Checker
- Generate Binary Numbers
- Minimum Cost of ropes
- N meetings in one room
- Rotate Deque By K
- Union of Arrays with Duplicates
- Missing in Array
- Product array puzzle
- Roman Number to Integer
- Sort 0s, 1s and 2s
- Find Kth Rotation
- Split the Array
- Sorted and Rotated Minimum
- Search in a Row-Column sorted matrix
- Move All Zeroes to End
- Count pairs Sum in matrices
- Pairs with difference k
- Swap and Maximize
- Bitonic Point
- Single Number
- Alternate positive and negative numbers
- Kth distance
- Palindrome Sentence
- Nearest multiple of 10
- Reorganize The Array
- Facing the sun
- Second Largest
- Two Sum - Pair with Given Sum
- Number of occurrence
- Modify the Array
- Sum Pair closest to target
- Longest substring with distinct characters
- Substrings with same first and last characters
- Tywin's War Strategy
- Palindrome String
- Total count
- Pair with given sum in a sorted array
- Largest number in one swap
- Assign Mice Holes
- Factorials Less than or Equal to n
- Check if a String is Subsequence of Other
- Find pairs with given sum in doubly linked list
- Sort a k sorted doubly linked list
- Print GFG n times
- Stock Buy and Sell – Max one Transaction Allowed
- Search in Linked List
- Remove duplicates from a sorted doubly linked list
- Array to Linked List
- Introduction to Doubly Linked List
- Find the first node of loop in linked list
- Two Smallests in Every Subarray
- Largest Pair Sum
- Two Swaps
- Maximize partitions in a String
- Count pairs with given sum
- Count Pairs whose sum is less than target
- Union of Two Sorted Arrays with Distinct Elements
- Intersection of Two arrays with Duplicate Elements
- Find All Triplets with Zero Sum
- Search in a row-wise sorted matrix
- Find Only Repetitive Element from 1 to n-1
- Unique Number I
- Rotate a Linked List
- Sort a linked list of 0s, 1s and 2s
- Add Number Linked Lists
- Add 1 to a Linked List Number
- Detect Loop in linked list
- Quick Sort on Linked List
- Insert in Sorted Circular Linked List
- Bottom View of Binary Tree
- Intersection Point in Y Shaped Linked Lists
- Diameter of a Binary Tree
- Merge two sorted linked lists
- Flattening a Linked List
- Tree Boundary Traversal
- Directed Graph Cycle
- Undirected Graph Cycle
- The Celebrity Problem
- Largest subarray with 0 sum
- Topological sort
- Merge K sorted linked lists
- Find the number of islands
- Get Min from Stack
- Serialize and deserialize a binary tree
- Gas Station
- Kth element in Matrix
- Is Binary Tree Heap
- Remove loop in Linked List
- Dijkstra Algorithm
- Multiply two strings
- Implement Atoi
- Palindrome Linked List
- Rat in a Maze
- BST with Dead End
- Merge two BST 's
- Count distinct elements in every window
- Root to leaf paths sum
- Bridge edge in a graph
- Sort a stack
- k-th Smallest in BST
- Merge Sort for Linked List
- Pair Sum in BST
- Root to Leaf Paths
- XOR Linked List
- Counting elements in two arrays
- K Sum Paths
- Construct Tree from Inorder & Preorder
- Insert in Sorted way in a Sorted DLL
- Maximum path sum
- Predecessor and Successor
- Find length of Loop
- Deletion and Reverse in Circular Linked List
- Median of BST
- Sum of nodes on the longest path
- ZigZag Tree Traversal
- Swap Kth nodes from ends
- Maximum Non-Adjacent Nodes Sum
- Smallest Positive Missing
- Possible Words From Phone Digits
- Rotate and delete
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Count Inversions
- Union of Two Sorted Arrays
- Indexes of Subarray Sum
- Count the number of possible triangles
- Sort by Absolute Difference
- Merge Without Extra Space
- Make Matrix Beautiful
- Spirally traversing a matrix
- Search in a sorted Matrix
- Subarray range with given sum
- Longest Consecutive Subsequence
- Case-specific Sorting of Strings
- Postfix Evaluation
- Stock span problem
- Next Greater Element
- K Sized Subarray Maximum
- Minimum Cost of ropes
- Nearly sorted
- Activity Selection
- Job Sequencing Problem
- Minimum Platforms
- Largest number in K swaps
- Minimum Jumps
- Stickler Thief
- Ways to Reach the n'th Stair
- Sum of all substrings of a number
- Longest Increasing Subsequence
- Longest Common Subsequence
- 0 - 1 Knapsack Problem
- Allocate Minimum Pages
- Implement Trie
- Rotten Oranges
- Container With Most Water
- Print Anagrams Together
- Rotate by 90 degree
- Top K Frequent in Array
- Word Break
- Stock Buy and Sell – Multiple Transaction Allowed
- Word Search
- Sort 0s, 1s and 2s
- Missing And Repeating
- Pascal Triangle
- Sum of Subarrays
- Longest Span in two Binary Arrays
- Maximize Number of 1's
- Count Occurences of Anagrams
- Pythagorean Triplet
- Search in Rotated Sorted Array
- Max Score from Subarray Mins
- Form the Largest Number
- Add Binary Strings
- Maximum Product Subarray
- Sort the given array after applying the given equation
- Check if frequencies can be equal
- Substrings with K Distinct
- Palindrome SubStrings
- Longest Subarray with Sum K
- Count the Reversals
- Cutting Binary String
- Factorials of large numbers
- Search Pattern (KMP-Algorithm)
- k largest elements
- Smallest distinct window
- Longest substring with distinct characters
- Longest Substring with K Uniques
- Longest Palindrome in a String
- Look and Say Pattern
- K-th element of two Arrays
- K closest elements
- Missing element of AP
- LCS of three strings
- Longest Palindromic Subsequence
- Equalize the Towers
- Minimum sum
- Not a subset sum
- Minimize the Heights II
- Minimum Deletions
- Nine Divisors
- Shop in Candy Store
- Permutations of a String
- Unique Number II
- Coin Change (Count Ways)
- Mobile numeric keypad
- Gold Mine Problem
- Coin Change (Minimum Coins)
- Dice throw
- Trail of ones
- nCr
- Partition Equal Subset Sum
- LCM Triplet
- Game with String
- Next Permutation
- Power of k in factorial of n
- Decode the string
- Total Decoding Messages
- Print leaf nodes from preorder traversal of BST
- Replace O's with X's
- Count the paths
- Floyd Warshall
- Flood fill Algorithm
- Police and Thieves
- Subset Sum Problem
- Search Pattern (Rabin-Karp Algorithm)
- All Palindromic Partitions
- Bellman-Ford
- Subarrays with sum K
- Remove BST keys outside given range
- Coin Piles
- Substrings of length k with k-1 distinct elements
- Maximum XOR of two numbers in an array
- Maximum sum of elements not part of LIS
- BST to greater sum tree
- Find rectangle with corners as 1
- Minimize the Heights I
- Unique Number III
- All Unique Permutations of an array
- Course Schedule II
- Clone an Undirected Graph
- Min Cost Climbing Stairs
- Overlapping Intervals
- Reverse a Stack
- K-th Largest Sum Contiguous Subarray
- Exactly one swap
- Minimum Cost to cut a board into squares
- Next element with greater frequency
- Majority Element - More Than n/3
- Koko Eating Bananas
- Longest subarray with Atmost two distinct integers
- Sum of subarray minimum
- Minimal Cost
- Aggressive Cows
- Smallest Divisor
- Minimum days to make M bouquets
- Generate all binary strings
- Delete all occurrences of a given key in a doubly linked list
- Maximum Sum Combination
- Non-overlapping Intervals
- Stickler Thief II
- Insert Interval
- Longest String Chain
- Largest Divisible Subset
- Make array elements unique
- Next Greater Element in Circular Array
- Find the longest string
- Minimum repeat to make substring
- Prime List
- Unique Paths in a Grid
- Remove the balls
- Powerful Integer
- Kth Missing Positive Number in a Sorted Array
- Count Subarrays with given XOR
- Set Matrix Zeros
- Minimum cost to connect all houses in a city
- Meeting Rooms
- Find All Triplets with Zero Sum
- Split array in three equal sum subarrays
- Last Moment Before All Ants Fall Out
- Search in an almost Sorted Array
- Find H-Index
- Longest Subarray with Majority Greater than K
- Count all triplets with given sum in sorted array
- Balancing Consonants and Vowels Ratio
- Implement Pow
- Subarrays With At Most K Distinct Integers
- K Closest Points to Origin
- Longest Bounded-Difference Subarray
- The Knight's tour problem
- Divisible by 13
- Lexicographically Largest String After K Deletions
- Group Balls by Sequence
- Count Unique Vowel Strings
- Count Numbers Containing Specific Digits
- ASCII Range Sum
- 2D Difference Array
- Difference Check
- Farthest Smaller Right
- Maximize median after doing k addition operation
- Maximize the minimum difference between k elements
- Search in fully rotated sorted 2D matrix
- Minimum Steps to Halve Sum
- Min Add to Make Parentheses Valid
- String stack
- Longest Subarray Length
- Design MinMax Queue
- Unique K-Number Sum
- Sum of Nodes in BST Range
- Construct Tree from Preorder & Postorder
- K closest Values
- Split Array Subsequences
- Find K Smallest Sum Pairs
- Graph Diameter
- Linked List Group Reverse
- Binary Tree to DLL
- Clone List with Next and Random
- Max rectangle
- LRU Cache
- Alien Dictionary
- Smallest range in K lists
- Fixing Two nodes of a BST
- Trapping Rain Water
- Max Circular Subarray Sum
- Merge Without Extra Space
- Smallest window containing all characters
- Histogram Max Rectangular Area
- Max of min for every window size
- Find median in a stream
- Solve the Sudoku
- Stock Buy and Sell – Multiple Transaction Allowed
- Burning Tree
- Palindrome SubStrings
- Longest Prefix Suffix
- Sum-string
- Sub-arrays with equal number of occurences
- Edit Distance
- Stock Buy and Sell – Max K Transactions Allowed
- Matrix Chain Multiplication
- Median in a row-wise sorted Matrix
- Boolean Parenthesization
- Longest valid Parentheses
- N-Queen Problem
- Articulation Point - II
- Maximum sum Rectangle
- Distribute Candies
- Split Array Largest Sum
- Kth Smallest Number in Multiplication Table
- Stock Buy and Sell – Max 2 Transactions Allowed
- Min Chars to Add for Palindrome
- Aggressive Cows
- Expression Add Operators
- Count Reverse Pairs
- Account Merge
- Max min Height
- Meeting Rooms III
- Minimum K Consecutive Bit Flips
- Minimum Weight Cycle
- Count the Coprimes
- Longest Periodic Proper Prefix
- Maximum Non-Overlapping Odd Palindrome Sum
- Maximum subarray sum 2
- Sum of Mode
- Number of BST From Array
- Shortest Cycle
