ekakbasu12
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14 submissions in current year
SCHOOL (0)
BASIC (47)
EASY (235)
MEDIUM (279)
HARD (48)
- Reverse alternate nodes in Link List
- Rotate a Linked 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
- Insert in Sorted Circular Linked List
- Count BST nodes that lie in a given range
- Merge Sort
- Quick Sort
- Binary Tree from Inorder and Postorder
- Bottom View of Binary Tree
- Delete without head pointer
- Intersection in Y Shaped Lists
- Diameter of a Binary Tree
- Heap Sort
- Sum Tree
- Diagonal Tree Traversal
- Tree Boundary Traversal
- Delete a node from BST
- Directed Graph Cycle
- Undirected Graph Cycle
- LCA in Binary Tree
- Two Stacks in an Array
- Max sum path in two arrays
- The Celebrity Problem
- Largest subarray with 0 sum
- Topological sort
- Vertical Tree Traversal
- Find the number of islands
- Get Min from Stack
- Serialize and deserialize a binary tree
- Gas Station
- Wildcard Pattern Matching
- Linked List to Binary Tree
- Check if subtree
- Validate an IP Address
- Remove loop in Linked List
- Dijkstra Algorithm
- Additive sequence
- Sorted subsequence of size 3
- Multiply two strings
- Implement Atoi
- Maximum Difference
- Palindrome Linked List
- Print matrix in diagonal pattern
- Rat in a Maze Problem - I
- Bipartite Graph
- BST with Dead End
- k-Anagram
- Root to leaf paths sum
- Find triplets with zero sum
- Duplicate Subtree
- Top View of Binary Tree
- k-th Smallest in BST
- Find Common Nodes in two BSTs
- Level order traversal
- Peak element
- Euler Circuit in an Undirected Graph
- Euler circuit and Path
- Binary Tree to CDLL
- Root to Leaf Paths
- Linked List that is Sorted Alternatingly
- K Sum Paths
- Leftmost and rightmost nodes of binary tree
- Construct Tree from Inorder & Preorder
- Arrange Consonants and Vowels
- Count the nodes at distance K from leaf
- Vertical sum
- Isomorphic Trees
- Maximum path sum from any node
- 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
- Check if two Nodes are Cousins
- ZigZag Tree Traversal
- Maximum sum of Non-adjacent nodes
- Mother Vertex
- Ceil in BST
- Gray to Binary Conversion
- Reverse array in groups
- Smallest Positive Missing
- Power Of Numbers
- Wave Array
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Maximum Index
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Binary Array Sorting
- Count Inversions
- Two Repeated Elements
- Union of 2 Sorted Arrays
- Indexes of Subarray Sum
- Triplet Sum in Array
- Number of pairs
- Merge Without Extra Space
- Level of Nodes
- Make Matrix Beautiful
- Boolean Matrix
- Spirally traversing a matrix
- Search in a sorted Matrix
- Determinant of a Matrix
- Distance of nearest cell having 1
- Subarray with 0 sum
- Sort Elements by Decreasing Frequency
- Longest Consecutive Subsequence
- Strings Rotations of Each Other
- Stock span problem
- Next Greater Element
- Infix to Postfix
- K Sized Subarray Maximum
- Fractional Knapsack
- Job Sequencing Problem
- Minimum Jumps
- Detect Cycle using DSU
- Stickler Thief
- Optimal Strategy For A Game
- Sum of all substrings of a number
- 0 - 1 Knapsack Problem
- Lucky Numbers
- Allocate Minimum Pages
- Preorder to BST
- Kth Smallest
- Implement Trie
- Shortest Common Supersequence
- Rotten Oranges
- Maximize The Cut Segments
- Rotate by 90 degree
- Top K Frequent in Array
- Word Break
- Stock Buy and Sell – Multiple Transaction Allowed
- Prerequisite Tasks
- 4 Sum - All Quadruples
- Sort 0s, 1s and 2s
- Paths to reach origin
- Maximum Sub Array
- Pascal Triangle
- Number of subarrays with maximum values in given range
- Top k numbers in a stream
- Sum of Middle elements of two sorted arrays
- Single Among Doubles in a Sorted
- Consecutive 1's not allowed
- Count Occurences of Anagrams
- Single Among Doubles
- Pythagorean Triplet
- Painting the Fence
- Search in Rotated Sorted Array
- Count pairs Sum in matrices
- Sum of bit differences
- Form the Largest Number
- Longest subarray with sum divisible by K
- Check if a string is repetition of its substring of k-length
- Row with max 1s
- Check if frequencies can be equal
- Column name from a given column number
- Substrings with K Distinct
- Form a palindrome
- Longest Subarray with Sum K
- Max Sum without Adjacents
- Shuffle integers
- Find the N-th character
- k largest elements
- Sum of XOR of all pairs
- Longest Common Substring
- Longest substring with distinct characters
- Longest Substring with K Uniques
- Look and Say Pattern
- Product Pair
- K-th element of two Arrays
- Maximize the sum of selected numbers from a sorted array to make it empty
- LCS of three strings
- Largest Sum Subarray of Size at least K
- First negative in every window of size k
- Maximum difference of zeros and ones in binary string
- Minimize the Heights II
- Transform to prime
- First and Last Occurrences
- Palindrome in Alphanumeric String
- Minimum Deletions
- Print N-bit binary numbers having more 1s than 0s
- Minimum Swaps for Bracket Balancing
- Permutations of a String
- Number following a pattern
- Sum of Products
- Bleak Numbers
- Game of XOR
- Modified Game of Nim
- Minimum number of deletions and insertions
- Maximize dot product
- Max Sum Increasing Subsequence
- Sequence of Sequence
- Gold Mine Problem
- Perfect Sum Problem
- Power Set
- Count ways to N'th Stair(Order does not matter)
- Knapsack with Duplicate Items
- nCr
- Minimum steps to destination
- Partition Equal Subset Sum
- Count possible ways to construct buildings
- Count digit groupings of a number
- Array Pair Sum Divisibility Problem
- Number of paths
- Nth Natural Number
- Number of paths in a matrix with k coins
- Find nth root of m
- Game with String
- Smith Number
- Next Permutation
- Smaller on Left
- Maximum sum of hour glass
- How Many X's?
- Exit Point in a Matrix
- Stream First Non-repeating
- Transitive closure of a Graph
- Replace O's with X's
- Rohan's Love for Matrix
- Traverse All Edges And Vertices
- Find the string in grid
- Flood fill Algorithm
- Techfest and the Queue
- Largest subsquare surrounded by X
- Iterative Inorder
- Preorder traversal (Iterative)
- Iterative Postorder
- Capacity To Ship Packages Within D Days
- Remove K Digits
- Number of Provinces
- Find duplicate rows in a binary matrix
- Paths from root with a specified sum
- Shortest Prime Path
- Sort for Singly Linked List
- Anti Diagonal Traversal of Matrix
- Unique Number III
- All Unique Permutations of an array
- Course Schedule
- Clone an Undirected Graph
- Overlapping Intervals
- K-th Largest Sum Contiguous Subarray
- Maximum Meetings in One Room
- Buy Maximum Stocks
- Find shortest safe route in a matrix
- Graph is Tree or Not
- Number of Distinct Islands
- Minimum Multiplications to reach End
- Number Of Enclaves
- Eventual Safe States
- City With the Smallest Number of Neighbors at a Threshold Distance
- Path With Minimum Effort
- Shortest Path in Undirected Graph
- Shortest path in Directed Acyclic Graph
- Koko Eating Bananas
- Search in Rotated Array 2
- Aggressive Cows
- Smallest Divisor
- Combination Sum II
- Shortest Path in Weighted undirected graph
- Prefix to Infix Conversion
- Prefix to Postfix Conversion
- Minimum days to make M bouquets
- Postfix to Prefix Conversion
- Minimum Absolute Difference In BST
- Maximum Sum Combination
- Shortest Job first
- Count Number of Nodes in a Binary Tree
- Floor in BST
- Water the plants
- Number of Good Components
- New Year Resolution
- Grinding Geek
- Flatten BST to sorted list
- Minimize the Difference
- Pairs violating the BST property
- Kth common ancestor in BST
- 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
- Inorder Traversal
- Reverse a Doubly Linked List
- Bubble Sort
- Selection Sort
- Insertion Sort
- Check for BST
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- 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
- Transform to Sum Tree
- Intersection Sorted Linked Lists
- Find Transition Point
- Queue using two Stacks
- Remove Duplicates from a Sorted Linked List
- Stack using two queues
- Reverse Level Order Traversal
- DFS of Graph
- Stack using Linked List
- Implement stack using array
- Insert a node in a BST
- BFS of graph
- Identical Trees
- Root to leaf path sum
- Square Root
- Nodes without a Sibling
- Insertion at doubly linked list
- Lowest Common Ancestor in a BST
- Binary Search
- Run Length Encoding
- Remove Duplicates Sorted Array
- Level Order Line by Line
- BST Keys in a Range
- Minimum Depth of a Binary Tree
- Remove Duplicates from an array
- Binary Tree to BST
- Equilibrium index of an array
- Remove every k'th node
- Leaves at Same Level or Not
- Match specific pattern
- Delete in a Singly Linked List
- Kth largest element in BST
- Minimum distance in an Array
- Array Duplicates
- Three way partitioning
- Index of an Extra Element
- Insert in a Sorted List
- Level of a Node in Binary Tree
- Sum of leaf nodes in BST
- More than n/k Occurrences
- Reverse Using Stack
- Symmetric Tree
- Find the Sum of Last N nodes of the Linked List
- Count Pairs whose sum is equal to X
- Find length of Loop
- Leaf under budget
- Reverse first K of a Queue
- Sum of Left Leaf Nodes
- Closest Neighbour in BST
- Brothers From Different Roots
- Delete Mid of a Stack
- The New Line
- Swap the array elements
- Predict the Column
- Xoring and Clearing
- First Set Bit
- Rightmost different bit
- Check K-th Bit
- Power of 2
- 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
- Matrix Boundary Traversal
- Check if a string is Isogram or not
- Anagram
- Winner of an election
- String Rotated by 2 Places
- Isomorphic Strings
- Most Frequent Character
- Reverse Words
- Sum of numbers in string
- Minimum indexed character
- Panagram Checking
- Non Repeating Character
- Parenthesis Checker
- Minimum indexed character
- Minimum Cost of ropes
- N meetings in one room
- Largest number with given sum
- 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
- Numbers containing 1, 2 and 3
- Missing in Array
- Product array puzzle
- Roman Number to Integer
- Search an element in sorted and rotated array
- Intersection of Arrays with Distinct
- Max Value Permutation
- Missing And Repeating
- Subarrays with given sum
- Buildings receiving sunlight
- Non-Repeating Element
- Count the elements
- Find Kth Rotation
- Common in 3 Sorted Arrays
- Sorted and Rotated Minimum
- Maximum no of 1's row
- Search in a Row-Column sorted matrix
- Move All Zeroes to End
- String Duplicates Removal
- Missing number
- Move all negative elements to end
- Chocolate Distribution Problem
- Count the triplets
- Bitonic Point
- Left most and right most index
- Smallest subarray with sum greater than x
- Closest Strings
- Single Number
- Alternate Positive Negative
- Remaining String
- Remove Consecutive Characters
- Remove b and ac from a given string
- Rearrange a string
- Remove Duplicates
- Nearest multiple of 10
- Sum of two numbers represented as arrays
- Facing the sun
- Twice Counter
- Word with maximum frequency
- Second Largest
- Convert array into Zig-Zag fashion
- Two Sum - Pair with Given Sum
- Rotate Bits
- Second most repeated string in a sequence
- Sort Unsorted Subarray
- Find all pairs with a given sum
- Number of occurrence
- K-Pangrams
- Reversing the equation
- Does array represent Heap
- Modify the Array
- Check if array is sorted
- Find missing in second array
- String's Count
- Longest Common Prefix of Strings
- First Repeated Character
- Special array reversal
- Meta Strings
- Min Number of Flips
- Two sum -Pairs with 0 Sum
- Segregate 0s and 1s
- Play With OR
- At Least K Occurrences
- Element with left side smaller and right side greater
- Find the closest pair from two arrays
- Count the Zeros
- Merge two binary Max heaps
- Palindrome String
- Fitting The Array
- K-th missing element
- Count number of words
- Print Bracket Number
- Odd Even Problem
- Extract the Number from the String
- Minimum Operations
- Divisibility by 8
- Reverse Bits
- Max Sum Subarray of size K
- Nth Fibonacci Number
- Prime Number
- Maximum Sum Problem
- Party of Couples
- Shortest path from 1 to n
- Sum 1 to n Divisors
- Count numbers containing 4
- Reach the Nth point
- Perfect Numbers
- Largest number possible
- Recamans sequence
- Form a number divisible by 3 using array digits
- Recursive sequence
- Juggler Sequence
- Row with Minimum 1s
- Make Zeroes
- Surround the 1's
- Inorder Traversal and BST
- Letters Collection
- Print Pattern
- Array to BST
- Sum of dependencies in a graph
- Plus One
- Search insert position of K in a sorted array
- Queue using stack
- First and last occurrences of x
- Smallest window containing 0, 1 and 2
- Insert an Element at the Bottom of a Stack
- Pattern 2
- Pattern 3
- Pattern 4
- Fibonacci series up to Nth term
- Outermost Parentheses
- Maximum Depth Of Binary Tree
- Divisor Game
- Search in Linked List
- Find the first node of loop in linked list
- Frogs and Jumps
- Equal Left and Right Subarray Sum
- Wifi Range
- Make Palindrome
- Weird Island
- Construction of a string
- Split an array into two equal Sum subarrays
- Linked List Group Reverse
- Binary Tree to DLL
- Clone List with Next and Random
- Min distance between two given nodes of a Binary Tree
- Subtraction in Linked List
- Distinct occurrences
- AVL Tree Insertion
- Alien Dictionary
- AVL Tree Deletion
- Merge Sort on Doubly Linked List
- Nodes at given distance in binary tree
- Smallest window containing all characters
- Minimum Cost Path
- Word Ladder I
- Median of 2 Sorted Arrays of Different Sizes
- Burning Tree
- Count Pairs in an Array
- The Painter's Partition Problem-II
- Search Pattern
- Longest Prefix Suffix
- Number of distinct subsequences
- Wildcard string matching
- Circle of strings
- Longest repeating and non-overlapping substring
- Sum-string
- Edit Distance
- Minimum Points To Reach Destination
- Palindromic Partitioning
- Strictly Increasing Array
- Generalised Fibonacci numbers
- Boolean Parenthesization
- Possible Paths in a Tree
- N-Queen Problem
- Brackets in Matrix Chain Multiplication
- Search Pattern (Rabin-Karp Algorithm)
- Find all Critical Connections in the Graph
- Reverse a sublist of a linked list
- Distribute candies in a binary tree
- Split Array Largest Sum
- Find the String
- Stock Buy and Sell – Max 2 Transactions Allowed
- Largest rectangular sub-matrix whose sum is 0
- Vertex Cover
- Candy
- Account Merge
- Better String
- Geekina Hate 1s
- Making A Large Island
- Print Linked List
- Find Length of Linked List
- Size of Binary Tree
- Count Leaves in Binary Tree
- Postorder Traversal
- Queue using Linked List
- Queue Using Array
- Preorder Traversal
- First Occurence
- Search a node in BST
- Linked List Insertion At End
- Minimum element in BST
- Anagram of String
- Is Linked List Length Even?
- Identical Linked Lists
- Sum of Binary Tree
- Insert in Middle of Linked List
- Count Non-Leaf Nodes in Tree
- Number is sparse or not
- Array Search
- Sorted Array Search
- Binary String
- Remove common characters and concatenate
- Reverse a String
- First n Fibonacci
- C++ Hello World
- Sum of Natural Numbers
- Searching in an Array
- Immediate Smaller Element
- Uncommon characters
- Repeated Character
- Largest Element in Array
- Rotate Array by One
- Array Subset
- Rotating an Array
- Min and Max in Array
- Print first letter of every word in the string
- Factorial
- Count Squares
- Sorted matrix
- Max Min
- Pattern 1
- Pattern 5
- Pattern 6
- Pattern 7
- Pattern 8
- Pattern 11
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