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2024

14 Nov HTTP Cookie
13 Nov Cross-Site Scripting (XSS)
13 Nov Content Security Policy
12 Nov Reverse Engineering 101
11 Nov Secure Coding in C and C++ (Part 2)
11 Nov Secure Coding in Java - OWASP TOP 10
10 Nov Security Tools
09 Nov Secure Coding in C and C++ (Part 1)
21 Oct Circular tour (geeksforgeeks - SDE Sheet)
21 Oct Circle of strings (geeksforgeeks - SDE Sheet)
20 Oct LRU Cache (geeksforgeeks - SDE Sheet)
17 Oct Search Pattern (Rabin-Karp Algorithm) (geeksforgeeks - SDE Sheet)
16 Oct Count total set bits (geeksforgeeks - SDE Sheet)
16 Oct Rotate Bits (geeksforgeeks - SDE Sheet)
16 Oct Rotate matrix elements clockwise (geeksforgeeks - SDE Sheet)
16 Oct Alien Dictionary (geeksforgeeks - SDE Sheet)
15 Oct Heap Sort (geeksforgeeks - SDE Sheet)
14 Oct Palindrome Pairs (geeksforgeeks - SDE Sheet)
13 Oct Common Elements (geeksforgeeks - SDE Sheet)
13 Oct Minimum XOR value pair (geeksforgeeks - SDE Sheet)
13 Oct Trie | (Delete) (geeksforgeeks - SDE Sheet)
13 Oct Insert and Search in a Trie (geeksforgeeks - SDE Sheet)
13 Oct Strongly Connected Components (Kosaraju's Algo) (geeksforgeeks - SDE Sheet)
12 Oct Dijkstra Algorithm (geeksforgeeks - SDE Sheet)
12 Oct Find the number of islands (geeksforgeeks - SDE Sheet)
12 Oct Topological sort (geeksforgeeks - SDE Sheet)
12 Oct Directed Graph Cycle (geeksforgeeks - SDE Sheet)
03 Oct Maximize The Cut Segments (geeksforgeeks - SDE Sheet)
02 Oct Undirected Graph Cycle (geeksforgeeks - SDE Sheet)
02 Oct DFS of Graph (geeksforgeeks - SDE Sheet)
02 Oct BFS of graph (geeksforgeeks - SDE Sheet)
02 Oct Minimum sum partition (geeksforgeeks - SDE Sheet)
01 Oct Snake and Ladder Problem (geeksforgeeks - SDE Sheet)
26 Sep Egg Dropping Puzzle (geeksforgeeks - SDE Sheet)
25 Sep Floyd Warshall (geeksforgeeks - SDE Sheet)
25 Sep Max Sum Increasing Subsequence (geeksforgeeks - SDE Sheet)
23 Sep Partition Equal Subset Sum (geeksforgeeks - SDE Sheet)
23 Sep Longest Common Subsequence (geeksforgeeks - SDE Sheet)
22 Sep Longest Increasing Subsequence (geeksforgeeks - SDE Sheet)
21 Sep Count number of hops (geeksforgeeks - SDE Sheet)
21 Sep Choose and Swap (geeksforgeeks - SDE Sheet)
21 Sep Activity Selection (geeksforgeeks - SDE Sheet)
21 Sep Page Faults in LRU (geeksforgeeks - SDE Sheet)
21 Sep Minimum number of Coins (geeksforgeeks - SDE Sheet)
21 Sep Largest number possible (geeksforgeeks - SDE Sheet)
20 Sep N meetings in one room (geeksforgeeks - SDE Sheet)
20 Sep Maximum Path Sum between 2 Special Nodes (geeksforgeeks - SDE Sheet)
20 Sep Graph is Tree or Not (geeksforgeeks - SDE Sheet)
20 Sep Merge two BST's (geeksforgeeks - SDE Sheet)
20 Sep Serialize and deserialize a binary tree (geeksforgeeks - SDE Sheet)
19 Sep Connect Nodes at Same Level (geeksforgeeks - SDE Sheet)
19 Sep Vertical Tree Traversal (geeksforgeeks - SDE Sheet)
19 Sep Bottom View of Binary Tree (geeksforgeeks - SDE Sheet)
18 Sep Diameter of a Binary Tree (geeksforgeeks - SDE Sheet)
18 Sep Array to BST (geeksforgeeks - SDE Sheet)
18 Sep Lowest Common Ancestor in a BST (geeksforgeeks - SDE Sheet)
18 Sep Symmetric Tree (geeksforgeeks - SDE Sheet)
17 Sep Kth largest element in BST (geeksforgeeks - SDE Sheet)
17 Sep Identical Trees (geeksforgeeks - SDE Sheet)
17 Sep Height of Binary Tree (geeksforgeeks - SDE Sheet)
17 Sep Balanced Tree Check (geeksforgeeks - SDE Sheet)
17 Sep Left View of Binary Tree (geeksforgeeks - SDE Sheet)
17 Sep Check for BST (geeksforgeeks - SDE Sheet)
17 Sep Count Leaves in Binary Tree (geeksforgeeks - SDE Sheet)
16 Sep Minimum Cost Path (geeksforgeeks - SDE Sheet)
16 Sep Find median in a stream (geeksforgeeks - SDE Sheet)
15 Sep Huffman Decoding-1 (geeksforgeeks - SDE Sheet)
15 Sep Implement Queue using Linked List (geeksforgeeks - SDE Sheet)
15 Sep Histogram Max Rectangular Area (geeksforgeeks - SDE Sheet)
15 Sep Get minimum element from stack (geeksforgeeks - SDE Sheet)
15 Sep Next Greater Element (geeksforgeeks - SDE Sheet)
15 Sep Queue using two Stacks (geeksforgeeks - SDE Sheet)
15 Sep Stack using two queues (geeksforgeeks - SDE Sheet)
14 Sep Binary Tree to DLL (geeksforgeeks - SDE Sheet)
14 Sep Reverse a Linked List in Groups (geeksforgeeks - SDE Sheet)
14 Sep Merge K sorted linked lists (geeksforgeeks - SDE Sheet)
14 Sep Merge two sorted linked lists (geeksforgeeks - SDE Sheet)
14 Sep Flattening a Linked List (geeksforgeeks - SDE Sheet)
14 Sep Rotate a Linked List (geeksforgeeks - SDE Sheet)
14 Sep Intersection Point in Y Shaped Linked Lists (geeksforgeeks - SDE Sheet)
14 Sep Add Number Linked Lists (geeksforgeeks - SDE Sheet)
14 Sep Palindrome Linked List (geeksforgeeks - SDE Sheet)
12 Sep Detect Loop in linked list (geeksforgeeks - SDE Sheet)
12 Sep Remove loop in Linked List (geeksforgeeks - SDE Sheet)
12 Sep Pairwise swap elements of a linked list (geeksforgeeks - SDE Sheet)
12 Sep Implement Stack using Linked List (geeksforgeeks - SDE Sheet)
12 Sep Sort a linked list of 0s, 1s and 2s (geeksforgeeks - SDE Sheet)
11 Sep Delete without head pointer (geeksforgeeks - SDE Sheet)
11 Sep Reverse a linked list (geeksforgeeks - SDE Sheet)
11 Sep Middle of a Linked List (geeksforgeeks - SDE Sheet)
11 Sep Kth from End of Linked List (geeksforgeeks - SDE Sheet)
10 Sep Swap all odd and even bits (geeksforgeeks - SDE Sheet)
09 Sep Longest Consecutive 1's (geeksforgeeks - SDE Sheet)
09 Sep Party of Couples (geeksforgeeks - SDE Sheet)
09 Sep Rightmost different bit (geeksforgeeks - SDE Sheet)
09 Sep First Set Bit (geeksforgeeks - SDE Sheet)
09 Sep K-th Bit is Set or Not (geeksforgeeks - SDE Sheet)
09 Sep Power of 2 (geeksforgeeks - SDE Sheet)
09 Sep Toggle bits in the given range (geeksforgeeks - SDE Sheet)
08 Sep Set kth bit (geeksforgeeks - SDE Sheet)
08 Sep Number is sparse or not (geeksforgeeks - SDE Sheet)
08 Sep Bit Difference (geeksforgeeks - SDE Sheet)
08 Sep N-Queen Problem (geeksforgeeks - SDE Sheet)
08 Sep Rat in a Maze Problem - I (geeksforgeeks - SDE Sheet)
08 Sep Special Keyboard (geeksforgeeks - SDE Sheet)
07 Sep Word Boggle (geeksforgeeks - SDE Sheet)
05 Sep Tower Of Hanoi (geeksforgeeks - SDE Sheet)
05 Sep Level order traversal in spiral form (geeksforgeeks - SDE Sheet)
03 Sep Edit Distance (geeksforgeeks - SDE Sheet)
03 Sep Rearrange characters (geeksforgeeks - SDE Sheet)
01 Sep Generate IP Addresses (geeksforgeeks - SDE Sheet)
01 Sep Form a palindrome (geeksforgeeks - SDE Sheet)
01 Sep Recursively remove all adjacent duplicates (geeksforgeeks - SDE Sheet)
01 Sep Implement Atoi (geeksforgeeks - SDE Sheet)
01 Sep Longest Common Substring (geeksforgeeks - SDE Sheet)
31 Aug Permutations of a given string (geeksforgeeks - SDE Sheet)
31 Aug Longest Palindrome in a String (geeksforgeeks - SDE Sheet)
31 Aug Longest Distinct characters in string (geeksforgeeks - SDE Sheet)
31 Aug Roman Number to Integer (geeksforgeeks - SDE Sheet)
31 Aug String Rotated by 2 Places (geeksforgeeks - SDE Sheet)
31 Aug Reverse Words (geeksforgeeks - SDE Sheet)
31 Aug Parenthesis Checker (geeksforgeeks - SDE Sheet)
31 Aug Implement strstr (geeksforgeeks - SDE Sheet)
31 Aug Solve the Sudoku (geeksforgeeks - SDE Sheet)
30 Aug Kth element in Matrix (geeksforgeeks - SDE Sheet)
30 Aug Find whether path exist (geeksforgeeks - SDE Sheet)
30 Aug Maximum path sum in matrix (geeksforgeeks - SDE Sheet)
30 Aug Shortest Source to Destination Path (geeksforgeeks - SDE Sheet)
30 Aug Rotten Oranges (geeksforgeeks - SDE Sheet)
29 Aug Smallest window in a string containing all the characters of another string (geeksforgeeks - SDE Sheet)
28 Aug Array Pair Sum Divisibility Problem (geeksforgeeks - SDE Sheet)
28 Aug Longest consecutive subsequence (geeksforgeeks - SDE Sheet)
28 Aug Convert a sentence into its equivalent mobile numeric keypad sequence (geeksforgeeks - SDE Sheet)
28 Aug Find first repeated character (geeksforgeeks - SDE Sheet)
28 Aug Minimum indexed character (geeksforgeeks - SDE Sheet)
28 Aug Count distinct elements in every window (geeksforgeeks - SDE Sheet)
28 Aug Remove Duplicates (geeksforgeeks - SDE Sheet)
28 Aug Uncommon characters (geeksforgeeks - SDE Sheet)
28 Aug Merge Without Extra Space (geeksforgeeks - SDE Sheet)
27 Aug Number of pairs (geeksforgeeks - SDE Sheet)
26 Aug Largest BST (geeksforgeeks - SDE Sheet)
26 Aug Merge Sort (geeksforgeeks - SDE Sheet)
26 Aug Find All Four Sum Numbers (geeksforgeeks - SDE Sheet)
26 Aug Quick Sort (geeksforgeeks - SDE Sheet)
26 Aug Maximize Toys (geeksforgeeks - SDE Sheet)
26 Aug Anagram (geeksforgeeks - SDE Sheet)
25 Aug Allocate Minimum Pages (geeksforgeeks - SDE Sheet)
25 Aug Maximum no of 1's row (geeksforgeeks - SDE Sheet)
25 Aug Find the element that appears once in sorted array (geeksforgeeks - SDE Sheet)
25 Aug Overlapping Intervals (geeksforgeeks - SDE Sheet)
25 Aug Sum of Middle elements of two sorted arrays (geeksforgeeks - SDE Sheet)
25 Aug Swapping pairs make sum equal (geeksforgeeks - SDE Sheet)
25 Aug Largest Number formed from an Array (geeksforgeeks - SDE Sheet)
25 Aug Stock span problem (geeksforgeeks - SDE Sheet)
25 Aug Coin Change (Count Ways) (geeksforgeeks - SDE Sheet)
25 Aug K-th element of two Arrays (geeksforgeeks - SDE Sheet)
24 Aug Stock buy and sell (geeksforgeeks - SDE Sheet)
24 Aug Spirally traversing a matrix (geeksforgeeks - SDE Sheet)
24 Aug K Sized Subarray Maximum (geeksforgeeks - SDE Sheet)
24 Aug Largest subarray with 0 sum (geeksforgeeks - SDE Sheet)
24 Aug Minimum Platforms (geeksforgeeks - SDE Sheet)
24 Aug Count Inversions (geeksforgeeks - SDE Sheet)
24 Aug Minimize the Heights II (geeksforgeeks - SDE Sheet)
22 Aug Merge Strings Alternately
04 Aug Design Bounded Blocking Queue
03 Jun Minimum Number of Keypresses
03 Jun Minimum Adjacent Swaps to Make a Valid Array
03 Jun Next Greater Node In Linked List
28 May Minimum Number of Food Buckets to Feed the Hamsters
17 May Unique rows in boolean matrix (geeksforgeeks - SDE Sheet)
16 May First non-repeating character in a stream (geeksforgeeks - SDE Sheet)
15 May Uncommon characters (geeksforgeeks - SDE Sheet)
15 May Search in a row-column sorted Matrix (geeksforgeeks - SDE Sheet)
15 May Sort an array according to the other (geeksforgeeks - SDE Sheet)
14 May Allocate minimum number of pages (geeksforgeeks - SDE Sheet)
13 May Minimum Swaps to Sort (geeksforgeeks - SDE Sheet)
12 May Rearrange Array Alternately (geeksforgeeks - SDE Sheet)
10 May Zero Sum Subarrays (geeksforgeeks - SDE Sheet)
09 May Largest subarray with 0 sum (geeksforgeeks - SDE Sheet)
08 May Maximum of all subarrays of size k (geeksforgeeks - SDE Sheet)
30 Apr Inorder Successor in BST
16 Apr Reverse words in a given string (geeksforgeeks - SDE Sheet)
15 Apr K-th element of two Arrays (geeksforgeeks - SDE Sheet)
09 Apr Length Unsorted Subarray
08 Apr Kth smallest element (geeksforgeeks - SDE Sheet)
07 Apr Minimum number of jumps (geeksforgeeks - SDE Sheet)
07 Apr Kadane's Algorithm (geeksforgeeks - SDE Sheet)
07 Apr Find Indexes of a subarray with given sum (geeksforgeeks - SDE Sheet)
06 Apr Minimize the sum of product (geeksforgeeks - SDE Sheet)
06 Apr Convert array into Zig-Zag fashion (geeksforgeeks - SDE Sheet)
06 Apr Find all pairs with a given sum (geeksforgeeks - SDE Sheet)
06 Apr Longest Common Prefix in an Array (geeksforgeeks - SDE Sheet)
05 Apr Equilibrium Point (geeksforgeeks - SDE Sheet)
05 Apr Leaders in an array (geeksforgeeks - SDE Sheet)
04 Apr Missing number in array (geeksforgeeks - SDE Sheet)
04 Apr Array Subset of another array (geeksforgeeks - SDE Sheet)
03 Apr Sort an array of 0s, 1s and 2s
23 Mar Pascal's Triangle
11 Mar Max Consecutive Ones III
02 Mar Validate Binary Search Tree
28 Feb Vowel and Consonant Substrings! (InterviewBit)
27 Feb Remove Consecutive Characters (InterviewBit)
25 Feb Implement StrStr (InterviewBit)
24 Feb Divide Integers (InterviewBit)
23 Feb Bulls and Cows (InterviewBit)
23 Feb Amazing Subarrays (InterviewBit)
23 Feb Longest Common Prefix (InterviewBit)
22 Feb Self Permutation (InterviewBit)
22 Feb String And Its Frequency (InterviewBit)
22 Feb Deserialize (InterviewBit)
21 Feb Different Bits Sum Pairwise (InterviewBit)
20 Feb XOR-ing the Subarrays! (InterviewBit)
19 Feb Min XOR value (InterviewBit)
16 Feb Length of Last Word (InterviewBit)
13 Feb Reverse Bits (InterviewBit)
12 Feb Trailing Zeroes (InterviewBit)
12 Feb Number of 1 Bits (InterviewBit)
11 Feb Find a peak element (InterviewBit)
11 Feb WoodCutting Made Easy! (InterviewBit)
11 Feb Matrix Median (InterviewBit)
10 Feb Implement Power Function (InterviewBit)
10 Feb Painter's Partition Problem (InterviewBit)
09 Feb Rotated Sorted Array Search (InterviewBit)
08 Feb Allocate Books (InterviewBit)
08 Feb Capacity To Ship Packages Within B Days (InterviewBit)
07 Feb Square Root of Integer (InterviewBit)
07 Feb Search in Bitonic Array! (InterviewBit)
06 Feb Search for a Range (InterviewBit)
06 Feb Matrix Search (InterviewBit)
31 Jan Sorted Insert Position (InterviewBit)
30 Jan Smaller or equal elements (InterviewBit)
30 Jan PRETTYPRINT (InterviewBit)
29 Jan Divisible by 60 (InterviewBit)
28 Jan Excel Column Number (InterviewBit)
27 Jan Reverse integer (InterviewBit)
26 Jan Palindrome Integer (InterviewBit)
25 Jan Highest Score (InterviewBit)
24 Jan Prime Sum (InterviewBit)
23 Jan Distribute in Circle! (InterviewBit)
23 Jan Total Moves For Bishop! (InterviewBit)
23 Jan Binary Representation (InterviewBit)
22 Jan Verify Prime (InterviewBit)
22 Jan Find Permutation (InterviewBit)
22 Jan Next Permutation (InterviewBit)
21 Jan Rotate Matrix (InterviewBit)
21 Jan Largest Number (InterviewBit)
21 Jan Sort array with squares! (InterviewBit)
21 Jan Pigeonhole Sort
21 Jan Maximum Consecutive Gap (InterviewBit)
21 Jan Balance Array (InterviewBit)
20 Jan Find Duplicate in Array (InterviewBit)
20 Jan Triplets with Sum between given range (InterviewBit)
20 Jan Spiral Order Matrix II (InterviewBit)
20 Jan Anti Diagonals (InterviewBit)
20 Jan Pascal Triangle (InterviewBit)
19 Jan Kth Row of Pascal's Triangle (InterviewBit)
19 Jan Segregate 0s and 1s in an array (InterviewBit)
19 Jan Make equal elements Array (InterviewBit)
19 Jan Perfect Peak of Array (InterviewBit)
18 Jan Array Sum (InterviewBit)
18 Jan Move Zeroes (InterviewBit)
18 Jan N/3 Repeat Number (InterviewBit)
17 Jan Repeat and Missing Number Array (InterviewBit)
17 Jan First Missing Integer (InterviewBit)
16 Jan Maximum Sum Square SubMatrix (InterviewBit)
15 Jan Maximum Unsorted Subarray (InterviewBit)
15 Jan Max Distance (InterviewBit)
14 Jan Hotel Bookings Possible (InterviewBit)
14 Jan Wave Array (InterviewBit)
14 Jan Set Intersection (InterviewBit)
13 Jan Reorder Data in Log Files (InterviewBit)
10 Jan Max Min (InterviewBit)
09 Jan Partitions (InterviewBit)
08 Jan Flip (InterviewBit)
07 Jan Maximum Area of Triangle (InterviewBit)
06 Jan Maximum Absolute Difference (InterviewBit)
06 Jan Maximum Sum Triplet (InterviewBit)
04 Jan Minimum Lights to Activate (InterviewBit)
03 Jan Min Steps in Infinite Grid (Interviewbit)
03 Jan Pick from both sides (Interviewbit)
02 Jan Occurence of Each Number (InterviewBit)

2023

23 Dec Getting Started With Spring
25 Oct Binary Tree Longest Consecutive Sequence
18 Oct Find the Celebrity
17 Oct Find Permutation
13 Oct Missing Number In Arithmetic Progression
12 Oct First Unique Number
11 Oct Delete N Nodes After M Nodes of a Linked List
10 Oct Remove Interval
09 Oct Add Bold Tag in String
04 Oct Missing Ranges
03 Oct Candy Crush
02 Oct Sparse Matrix Multiplication
01 Oct Group Shifted Strings
27 Sep Find K-Length Substrings With No Repeated Characters
27 Sep Max Consecutive Ones II
26 Sep Longest Substring with At Most Two Distinct Characters
25 Sep Shortest Way to Form String
24 Sep Longest Arithmetic Subsequence of Given Difference
24 Sep Reverse Words in a String II
23 Sep One Edit Distance
21 Sep Confusing Number
20 Sep Wiggle Sort
19 Sep Maximum Distance in Arrays
16 Sep Best Time to Buy and Sell Stock IV
16 Sep Best Time to Buy and Sell Stock III
16 Sep Word Search II
15 Sep Text Justification
11 Sep IPO
11 Sep Max Points on a Line
10 Sep Construct Quad Tree
07 Sep Maximal Square
03 Sep Minimum Path Sum
31 Aug Furthest Point From Origin
26 Aug Maximum Sum Circular Subarray
26 Aug Find K Pairs with Smallest Sums
24 Aug Sort List
24 Aug Convert Sorted Array to Binary Search Tree
23 Aug N-Queens II
19 Aug Combinations
18 Aug Find First and Last Position of Element in Sorted Array
18 Aug Find Peak Element
17 Aug Minimum Genetic Mutation
17 Aug Snakes and Ladders
15 Aug Evaluate Division
15 Aug Search Insert Position
13 Aug Minimum Absolute Difference in BST
12 Aug Lowest Common Ancestor of a Binary Tree
12 Aug Binary Search Tree Iterator
12 Aug Count Complete Tree Nodes
12 Aug Sum Root to Leaf Numbers
11 Aug Flatten Binary Tree to Linked List
11 Aug Populating Next Right Pointers in Each Node II
09 Aug Partition List
08 Aug Add Binary
08 Aug Remove Duplicates from Sorted List II
07 Aug Reverse Linked List II
05 Aug Basic Calculator
04 Aug Simplify Path
04 Aug Valid Parentheses
03 Aug Minimum Number of Arrows to Burst Balloons
03 Aug Summary Ranges
03 Aug Game of Life
02 Aug Contains Duplicate II
01 Aug Word Pattern
01 Aug Isomorphic Strings
31 Jul Substring with Concatenation of All Words
29 Jul Minimum Size Subarray Sum
29 Jul Insert Delete GetRandom O(1)
28 Jul ZigZag Conversion
27 Jul Reverse Words in a String
25 Jul Length of Last Word
25 Jul Integer to Roman
24 Jul Roman to Integer
21 Jul H-Index
19 Jul Best Time to Buy and Sell Stock II
17 Jul Design Patterns: Index
17 Jul Design Pattern: Observer
17 Jul Remove Duplicates from Sorted Array II
16 Jul Design Pattern: Strategy
16 Jul Merge Sorted Array
16 Jul Design Pattern: Flyweight
16 Jul Design Pattern: Facade
16 Jul Design Pattern: Decorator
16 Jul Design Pattern: Adapter
15 Jul Java Multithreading - Interrupting Threads
15 Jul Java Multithreading - Callable and Future
15 Jul Java Multithreading - Semaphores
14 Jul Java Multithreading - Deadlock
13 Jul Design Pattern: Factory
13 Jul Java Multithreading - Re-entrant Locks
12 Jul Java Multithreading - Producer/Consumer (Using Low-Level Synchronization)
12 Jul Java Multithreading - Wait and Notify
11 Jul Java Multithreading - Producer/Consumer
10 Jul Design Pattern: Prototype
10 Jul Java Multithreading - Countdown Latches
06 Jul Design Pattern: Builder
06 Jul Java Multithreading - Thread Pools
05 Jul Design Pattern: Singleton
05 Jul Java Multithreading - Multiple Locks; Using Synchronized Code Blocks
04 Jul Java Multithreading - The Synchronized Keyword
03 Jul Java Multithreading - Basic Thread Synchronization
02 Jul Java Multithreading - Starting Java Threads
07 May Delete one
07 May Find Greatest Common Divisor of Array
07 May GCD and Inverse Modulo (Theory)
06 May Count pairs in array divisible by K
06 May Count Total Set Bits Till N
05 May Minimum Swaps required to group all 1s together
05 May All Sub-Matrices Sum
04 May Find All Good Indices
02 May First Missing Positive
30 Apr Gray Code
30 Apr Sum of Bitwise-OR of all Sub-Arrays
29 Apr Diffk II
29 Apr Largest Continuous Sequence Zero Sum
29 Apr First Repeating element
28 Apr tolower()
26 Apr Josephus Problem
25 Apr Majority Element
25 Apr Help From Sam
23 Apr Length of longest consecutive ones
23 Apr Transpose of a Matrix
22 Apr Even Subarrays
22 Apr Closest MinMax
21 Apr Pick from both sides!
21 Apr Balance Array (Special Index)
16 Mar Serialize and Deserialize Binary Tree
09 Mar Sliding Window Maximum
08 Mar Minimum Window Substring
07 Mar LRU Cache
05 Mar Alien Dictionary
05 Mar Swim in Rising Water
05 Mar Reconstruct Itinerary
04 Mar Cheapest Flights Within K Stops
04 Mar Network Delay Time
03 Mar Min Cost to Connect All Points
02 Mar Word Ladder
28 Feb Walls and Gates
27 Feb Pacific Atlantic Water Flow
26 Feb Distance from the Source (Bellman-Ford Algorithm)
26 Feb Floyd Warshall
25 Feb Minimal Spanning Tree
23 Feb Dijkstra Algorithm
22 Feb Number of Provinces
21 Feb Graphs 101 - Part 2
21 Feb Graphs 101 - Part 1
20 Feb Detect Squares
19 Feb Multiply Strings
18 Feb Plus One
18 Feb Happy Number
12 Feb Set Matrix Zeroes (InterviewBit)
12 Feb Spiral Matrix
12 Feb Rotate Image
11 Feb Reverse Integer
11 Feb Sum of Two Integers (Bit Manipulation)
09 Feb Minimum Interval to Include Each Query
08 Feb Meeting Rooms II
08 Feb Meeting Rooms
07 Feb Non-overlapping Intervals
07 Feb Insert Interval
07 Feb Merge Intervals
30 Jan Valid Parenthesis String
29 Jan Partition Labels
29 Jan Merge Triplets to Form Target Triplet
29 Jan Hand of Straights
29 Jan Gas Station
26 Jan Jump Game II
25 Jan Jump Game
25 Jan Maximum Subarray
22 Jan Burst Balloons
22 Jan Regular Expression Matching
22 Jan Distinct Subsequences
22 Jan Longest Increasing Path in a Matrix
22 Jan Interleaving String
20 Jan Target Sum
19 Jan Coin Change II
18 Jan Best Time to Buy and Sell Stock with Cooldown
16 Jan Word Break
07 Jan Palindrome Partitioning
07 Jan Letter Combinations of a Phone Number
06 Jan Word Search
06 Jan Binary Tree Paths

2022

28 Dec Binary Tree Maximum Path Sum 2
28 Dec Count Good Nodes in Binary Tree
27 Dec Subtree of Another Tree
27 Dec Balanced Binary Tree
24 Dec Same Tree
20 Dec Find the Duplicate Number
19 Dec Remove Duplicates from Sorted List
19 Dec Rotate List
19 Dec Swap Nodes in Pairs
19 Dec Remove Nth Node From End of List
14 Dec Reorder List
09 Dec Design Twitter
08 Dec Task Scheduler
06 Dec K Closest Points to Origin
06 Dec Median of Two Sorted Arrays
05 Dec Min Cost Matrix Chain Multiplication
04 Dec Matrix Chain Multiplication
04 Dec Time Based Key-Value Store
04 Dec Find Minimum in Rotated Sorted Array
03 Dec Largest Rectangle in Histogram
03 Dec Car Fleet
03 Dec Daily Temperatures
02 Dec Generate Parentheses
02 Dec Determine if Two Strings Are Close
01 Dec Evaluate Reverse Polish Notation
30 Nov Graph Valid Tree
29 Nov Clone Graph
28 Nov Find Players With Zero or One Losses
27 Nov Redundant Connection
27 Nov Course Schedule II
27 Nov Course Schedule
26 Nov Surrounded Regions
26 Nov Max Area of Island
26 Nov Rotten Oranges
26 Nov Number of Islands
26 Nov Number of Connected Components in an Undirected Graph
25 Nov Depth First Search
25 Nov Breadth First Search
22 Nov Coin Change
21 Nov Palindromic Substrings
20 Nov Longest Palindromic Substring
20 Nov House Robber I
20 Nov House Robber II
20 Nov Min Cost Climbing Stairs
20 Nov Flip Array
20 Nov Partition Equal Subset Sum
19 Nov Unbounded Knapsack
19 Nov Knapsack Problem (0/1)
19 Nov Regular Expression Match
18 Nov Min Sum Path in Matrix
16 Nov Min Triangle Sum
13 Nov N digit numbers with digit sum S
13 Nov Edit Distance
12 Nov Longest Common Subsequence
12 Nov Dungeon Game
12 Nov Longest Increasing Subsequence
12 Nov Maximum sum such that no two elements are adjacent
12 Nov Perfect Squares
11 Nov Unique Paths II
07 Nov Paint House
07 Nov Unique Paths
06 Nov Ways to Decode
06 Nov Maximum Sum Value - A[i]*B + A[j]*C + A[k]*D
04 Nov Search in Rotated Sorted Array
04 Nov Koko Eating Bananas
04 Nov Valid Sudoku
04 Nov Max Product Subarray
04 Nov Max Sum Without Adjacent Elements
04 Nov Friends Pairing Problem
04 Nov Minimum Number of Squares
02 Nov Fibonacci Number
01 Nov Stairs
31 Oct Combination Sum II
31 Oct Subsets II
31 Oct Subsets
31 Oct Combination Sum
30 Oct Permutations
30 Oct N-Queens
30 Oct Next Greater Element IV
30 Oct Next Greater Element III
29 Oct Next Greater Element II
29 Oct Next Greater Element I
29 Oct Search a 2D Matrix II
28 Oct Search a 2D Matrix
27 Oct Permutation in String
26 Oct Longest Repeating Character Replacement
25 Oct All Subsets
25 Oct All Subsets II
24 Oct Longest Substring Without Repeating Characters
24 Oct Best Time to Buy and Sell Stock
23 Oct Noble Integer
22 Oct Container With Most Water
22 Oct Two Sum II - Input Array Is Sorted
22 Oct Valid Palindrome
22 Oct Sort K-Sorted Array
20 Oct Maximum Profit When Buying a Car
20 Oct Distribute Candy
20 Oct Finish Maximum Jobs
19 Oct Kth Largest Element in a Stream
18 Oct Find Median from Data Stream
17 Oct Last Stone Weight
15 Oct Kth Largest Element in an Array
15 Oct Reverse Bits
15 Oct Zigzag Traversal
14 Oct Maximum AND Value
14 Oct Missing Number
14 Oct Sum of XOR of all pairs
12 Oct Single Number II
12 Oct Single Number I
12 Oct Single Number III
11 Oct Introduction to Bit Manipulation - Part 4
11 Oct Introduction to Bit Manipulation - Part 3
11 Oct Introduction to Bit Manipulation - Part 2
11 Oct Introduction to Bit Manipulation - Part 1
11 Oct Counting Bits
11 Oct Number of 1 Bits
11 Oct Longest Consecutive Sequence
10 Oct Encode and Decode Strings
09 Oct Product of Array Except Self
09 Oct Design Add and Search Words Data Structure
09 Oct Implement Trie (Prefix Tree)
09 Oct Top K Frequent Elements
09 Oct Group Anagrams
09 Oct Two Sum
09 Oct Valid Anagram
09 Oct Contains Duplicate
07 Oct Min Stack
06 Oct 3 sum
06 Oct Right Smaller Than
05 Oct Multi String Search (Trie)
05 Oct Trie - Introduction - Part 2
05 Oct Trie - Introduction - Part 1
05 Oct Populating Next Right Pointers in Each Node - Perfect Binary Tree
04 Oct Binary Tree Maximum Path Sum
03 Oct Validate Three Nodes in BST
03 Oct Lowest Common Ancestor - Using In-time and Out-time
03 Oct Lowest Common Ancestor of a Binary Search Tree
02 Oct Morris Traversal
02 Oct Construct Binary Tree from Inorder and Postorder Traversal
02 Oct Binary Tree Right Side View
02 Oct Kth Smallest Element in a BST
01 Oct Equal Tree Partition - Binary Tree
01 Oct Recover Binary Search Tree
01 Oct Least Common Ancestor - Binary Tree
27 Sep Valid Binary Search Tree
26 Sep Delete a Node in Binary Search Tree
25 Sep Construct Binary Tree from Preorder and Inorder Traversal
24 Sep Vertical Order Traversal - Binary Tree
23 Sep Binary Tree - Level Order Traversal II
23 Sep Size of a Binary Search Tree
23 Sep Height of a Binary Search Tree
18 Sep Count Days Spent Together
16 Sep Evaluate Expression
16 Sep Double Character Trouble
16 Sep Balanced Parenthesis
14 Sep Nearest Smaller Element
11 Sep Clone Linked List with Random Pointer - Constant Space Complexity
11 Sep Clone Linked List with Random Pointer
10 Sep Merge K Sorted Linked Lists
09 Sep Merge Sort Linked List
08 Sep Merge Two Sorted Linked List - 2
08 Sep Reverse a Linked List in K Groups
07 Sep Reverse a Linked List
07 Sep Reverse First K Nodes - LinkedList
03 Sep Rabin Karp
31 Aug Pattern Matcher
31 Aug Longest Prefix Suffix
26 Aug Common Elements in Two Arrays
25 Aug Count Rectangles
25 Aug Count Right Triangles
23 Aug Minimum Area Rectangle
22 Aug Count of Pairs with k Sum in Sorted Array
21 Aug Sub-Array with Given Sum (Two Pointers)
21 Aug Maximum Water between Two Walls
21 Aug 2 Pair Difference (Two Pointers)
21 Aug 2 Pair Sum (Two Pointers)
19 Aug Kth Element (Without Sorting)
12 Aug Special Integer - Maximum Sum with Max Length k
10 Aug Ath Magical Number
09 Aug Radix Sort
07 Aug Aggressive Cows
06 Aug Find Square Root (Binary Search Approach)
05 Aug Shifted Binary Search
02 Aug Count Inversion
01 Aug Two Arrays, Find Pairs A[i] > B[j]
31 Jul Duplicate Zeroes
29 Jul Merge Sort
29 Jul Sort Sub-Array in Array Given s,m,e
28 Jul Find Kth Smallest Element
21 Jul Find Number of Divisors
21 Jul Smallest Prime Factor
21 Jul Find Prime Numbers
21 Jul Check Prime
11 Jul A%M == B%M
11 Jul Change Array[i] to Array[Array[i]]
04 Jul Merge Two Sorted LinkedList
04 Jul Maximum Sum Sub-Matrix
03 Jul Largest Range in the Array
03 Jul Sort based on Three Numbers
02 Jul Find the Smallest Sub-Array to Sort
02 Jul Trapping Rain Water
30 Jun Sum of all Sub-Arrays
29 Jun Sum of Linked Lists
28 Jun Kadane's Algorithm
27 Jun Sort Stack (In Place)
27 Jun Max Path Sum in Binary Tree
27 Jun Height Balanced Binary Tree
27 Jun Find Successor in Binary Tree
26 Jun Binary Tree Diameter
26 Jun Bubble Sort
23 Jun Power Set
21 Jun Invert Binary Tree
21 Jun Min Height BST
21 Jun Validate BST
21 Jun Find kth Largest Value in BST
18 Jun Palindrome LinkedList
17 Jun Reverse a LinkedList
16 Jun Squares of a Sorted Array
16 Jun Remove nth Node From End of LinkedList
16 Jun Linked List Cycle
15 Jun Power Function
15 Jun Reverse String
14 Jun Find Leader in an Array (Carry Forward Technique)
14 Jun Subarray with 0 sum
14 Jun Equilibrium Index of an Array
14 Jun Prefix Sum Array
13 Jun Path Sum - Binary Tree
13 Jun Symmetric Binary Tree
12 Jun Maximum Depth of Binary Tree
12 Jun Binary Tree Level Order Traversal
12 Jun Rotate an Array k times
12 Jun Reverse an Array
12 Jun Reverse an Array in the given Range

2021

09 Apr Binary Search Tree - Insert
07 Apr String Palindrome

2020

25 Apr Find Square Root

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java geeksforgeeks important leetcode sde sheet arrays neetcode150 binarytree dynamic_programming interviewbit