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Overview
Basic Data Structures
Sorted Array
Implicitly Sorted Array
Advanced
Speedrun
DFS on Tree
Binary Search Tree
Advanced
Combinatorial Search
Additional States
Aggregation and Memoization
Additional Practices
Speedrun
Vanilla BFS
Matrix as Graph
Implicit Graph
Directed Graph / Topological Sort
Weighted Graph
Minimum Spanning Tree
Introduction
Same Direction
Opposite Direction
Sliding Window
Prefix Sum
Cycle Finding
Speedrun
Introduction
Coin Change
Dynamic number of subproblems
Two Sequences
0-1 Knapsack
Disjoint Set Union | Union Find
Data Structure Design
Segment Tree
Monotonic Stack
Line Sweep
Tree Traversal without Recursion
Greedy
Amazon OA
- Amazon Online Assessment Questions 2021 (OA)
- Robot in Circle
- Number Game
- Find All Combination of Numbers that Sum to a Target
- Fill The Truck
- Slowest Key
- Five Star Sellers
- Number of Ways to Split Into Primes
- Storage Optimization
- Music Pair
- Minimum Difficulty of a Job Schedule
- Autoscale Policy, Utilization Check
- Optimal Utilization
- Merge Two Sorted Lists
- Two Sum - Unique Pairs
- Shopping Patterns
- Amazon Prime Air Delivery Route
- Reorder Data in Log Files
- Top K Frequently Mentioned Keywords
Microsoft OA
- Microsoft Online Assessment Questions
- Max Network Rank
- Minimum Adj Swaps to Make Palindrome
- Lexicographically Smallest String
- Longest Substring Without 3 Contiguous Occurrences of Letter
- Min Moves to Obtain String Without 3 Identical Consecutive Letters
- String Without 3 Identical Consecutive Letters
- Longest Semi-Alternating Substring
- Min Steps to Make Piles Equal Height
- Day of week that is K days later
- Max Inserts to Obtain String Without 3 Consecutive 'a'
- Concatenated String Length with unique Characters
- Largest K such that both K and -K exist in array
- Min Adj Swaps to Group Red Balls
- Maximum Length of a Concatenated String with Unique Characters
- Unique Integers That Sum Up To 0
- Min Deletions To Obtain String in Right Format
- Particle Velocity
- Widest Path Without Trees
- Jump Game
- Fair Indexes
- Partition array into N subsets with balanced sum
Google OA
- Google Online Assessment Questions 2021 (OA)
- Compare Strings
- Largest Subarray
- Maximum Area Serving Cake
- Minimum Number of Decreasing Subsequence Partitions
- Pick Up Coupons
- Rose Garden
- Smallest Integer Satisfying the Rule
- Fill 2D Array
- Water Plants
- Split Strings
- Google Online Assessment 2021 (OA) - Rings on Rods
- Google Online Assessment 2021 (OA) - Longest Palindrome
Twitter OA
Editorials
- LeetCode 1048. Longest String Chain Solution
- LeetCode 1101. The Earliest Moment When Everyone Become Friends Solution
- LeetCode 1218. Longest Arithmetic Subsequence of Given Difference
- LeetCode 1277. Count Square Submatrices with All Ones Solution
- LeetCode 1293. Shortest Path in a Grid with Obstacles Elimination Solution
- LeetCode 1423. Maximum Points You Can Obtain from Cards Solution
- LeetCode 1631. Path With Minimum Effort Solution
- LeetCode 1697. Checking Existence of Edge Length Limited Paths Solution
- LeetCode 1937. Maximum Number of Points with Cost Solution
- LeetCode 2013. Detect Squares Solution
- LeetCode 2096. Step-By-Step Directions From a Binary Tree Node to Another Solution
- LeetCode 2128. Remove All Ones With Row and Column Flips Solution
- LeetCode 2158. Amount of New Area Painted Each Day Solution
- LeetCode 2178. Maximum Split of Positive Even Integers Solution
- LeetCode 274. H-Index Solution
- LeetCode 359. Logger Rate Limiter Solution
- LeetCode 366. Find Leaves of Binary Tree Solution
- LeetCode 394. Decode String Solution
- Minimum Swaps to Group All 1's Together
- LeetCode 419. Battleships in a Board Solution
- LeetCode 720. Longest Word in Dictionary Solution
- LeetCode 777. Swap Adjacent in LR String Solution
- LeetCode 778. Swim in Rising Water
- LeetCode 939. Minimum Area Rectangle Solution
- Akuna OA
- Another problem
- Bad Product
- Beautiful Arrangement
- Boats to Save People
- Combination Sum II
- Container With Most Water
- Course Schedule II
- Koko Eating Bananas
- Evaluate Division
- Find All Possible Recipes From Given Supplies
- Grey Code
- Is Graph Bipartite
- Kth Missing Positive Number
- Longest Substring with At Most Two Distinct Characters
- Matchsticks to Square
- Maximal Network Rank
- Minimum Swaps to Group All 1's Together
- Minesweeper
- Minimum Size Subarray Sum
- Minimum Swaps to Group All 1's Together
- My Calendar I
- Network Delay Time
- Numbers With Same Consecutive Differences
- Pacific Atlantic Water Flow
- Path Sum II
- Permutations II
- Plates Between Candles
- Reconstruct Itinerary
- Redundant Connection
- Regions Cut By Slashes
- Restore IP Addresses
- Minimum Swaps to Group All 1's Together
- Rotting Oranges
- Satisfiability of Equality Equations
- Find First and Last Position of Element in Sorted Array
- Shortest Path in Binary Matrix
- Single Element in a Sorted Array
- Snapshot Array
- Minimum Swaps to Group All 1's Together
- Subsets II
- Time Based key-Value Store
- Minimum Swaps to Group All 1's Together
- Word Break II
- Leetcode 1700. Number of Students Unable to Eat Lunch Solution
- Leetcode 1701. Average Waiting Time Solution
- Leetcode 1702. Maximum Binary String After Change Solution
- Leetcode 1703. Minimum Adjacent Swaps for K Consecutive Ones Solution
- Leetcode 1704. Determine if String Halves Are Alike Solution
- Leetcode 1705. Maximum Number of Eaten Apples Solution
- Leetcode 1706. Where Will the Ball Fall Solution
- Leetcode 1707. Maximum XOR With an Element From Array Solution
- Leetcode 1708. Largest Subarray Length K Solution
- Leetcode 1709. Biggest Window Between Visits Solution
- Leetcode 1710. Maximum Units on a Truck Solution
- Leetcode 1711. Count Good Meals Solution
- Leetcode 1712. Ways to Split Array Into Three Subarrays Solution
- Leetcode 1713. Minimum Operations to Make a Subsequence Solution
- Leetcode 1714. Sum Of Special Evenly-Spaced Elements In Array Solution
- Leetcode 1716. Calculate Money in Leetcode Bank Solution
- Leetcode 1717. Maximum Score From Removing Substrings Solution
- Leetcode 1719. Number Of Ways To Reconstruct A Tree Solution
- Leetcode 1720. Decode XORed Array Solution
- Leetcode 1721. Swapping Nodes in a Linked List Solution
- Leetcode 1722. Minimize Hamming Distance After Swap Operations Solution
- Leetcode 1724. Checking Existence of Edge Length Limited Paths II Solution
- Leetcode 1725. Number Of Rectangles That Can Form The Largest Square Solution
- Leetcode 1728. Cat and Mouse II Solution
- Leetcode 1730. Shortest Path to Get Food Solution
- Leetcode 1732. Find the Highest Altitude Solution
- Leetcode 1736. Latest Time by Replacing Hidden Digits Solution
- Leetcode 1737. Change Minimum Characters to Satisfy One of Three Conditions Solution
- Leetcode 1738. Find Kth Largest XOR Coordinate Value Solution
- Leetcode 1739. Building Boxes Solution
- Leetcode 1740. Find Distance in a Binary Tree Solution
- Leetcode 1742. Maximum Number of Balls in a Box Solution
- Leetcode 1743. Restore the Array From Adjacent Pairs Solution
- Leetcode 1744. Can You Eat Your Favorite Candy on Your Favorite Day? Solution
- Leetcode 1745. Palindrome Partitioning IV Solution
- Leetcode 1746. Maximum Subarray Sum After One Operation Solution
- Leetcode 1748. Sum of Unique Elements Solution
- Leetcode 1749. Maximum Absolute Sum of Any Subarray Solution
- Leetcode 1750. Minimum Length of String After Deleting Similar Ends
- Leetcode 1751. Maximum Number of Events That Can Be Attended II
- Leetcode 1800. Maximum Ascending Subarray Sum Solution
- Leetcode 1801. Number of Orders in the Backlog Solution
- Leetcode 1802. Maximum Value at a Given Index in a Bounded Array Solution
- Leetcode 1803. Count Pairs With XOR in a Range Solution
- Leetcode 1805. Number of Different Integers in a String Solution
- Leetcode 1806. Minimum Number of Operations to Reinitialize a Permutation Solution
- Leetcode 1807. Evaluate the Bracket Pairs of a String Solution
- Leetcode 1808. Maximize Number of Nice Divisors Solution
- Leetcode 1810. Minimum Path Cost in a Hidden Grid Solution
- Leetcode 1811. Find Interview Candidates Solution
- Leetcode 1813. Sentence Similarity III Solution
- Leetcode 1814. Count Nice Pairs in an Array Solution
- Leetcode 1815. Maximum Number of Groups Getting Fresh Donuts Solution
- Leetcode 1816. Truncate Sentence Solution
- Leetcode 1817. Finding the Users Active Minutes Solution
- Leetcode 1820. Maximum Number of Accepted Invitations Solution
- Leetcode 1821. Find Customers With Positive Revenue this Year Solution
- Leetcode 1822. Sign of the Product of an Array Solution
- Leetcode 1823. Find the Winner of the Circular Game Solution
- Leetcode 1824. Minimum Sideway Jumps Solution
- Leetcode 1826. Faulty Sensor Solution
- Leetcode 1827. Minimum Operations to Make the Array Increasing Solution
- Leetcode 1828. Queries on Number of Points Inside a Circle Solution
- Leetcode 1829. Maximum XOR for Each Query Solution
- Leetcode 1831. Maximum Transaction Each Day Solution
- Leetcode 1832. Check if the Sentence Is Pangram Solution
- Leetcode 1833. Maximum Ice Cream Bars Solution
- Leetcode 1834. Single-Threaded CPU Solution
- Leetcode 1835. Find XOR Sum of All Pairs Bitwise AND Solution
- Leetcode 1836. Remove Duplicates From an Unsorted Linked List Solution
- Leetcode 1837. Sum of Digits in Base K Solution
- Leetcode 1838. Frequency of the Most Frequent Element Solution
- Leetcode 1839. Longest Substring Of All Vowels in Order Solution
- Leetcode 1840. Maximum Building Height Solution
- Leetcode 1841. League Statistics Solution
- Leetcode 1842. Next Palindrome Using Same Digits Solution
- Leetcode 1844. Replace All Digits with Characters Solution
- Leetcode 1845. Seat Reservation Manager Solution
- Leetcode 1846. Maximum Element After Decreasing and Rearranging Solution
- Leetcode 1847. Closest Room Solution
- Leetcode 1848. Minimum Distance to the Target Element Solution
- Leetcode 1849. Splitting a String Into Descending Consecutive Values Solution
- Leetcode 1850. Minimum Adjacent Swaps to Reach the Kth Smallest Number Solution
- Leetcode 1851. Minimum Interval to Include Each Query Solution
- Leetcode 1852. Distinct Numbers in Each Subarray Solution
- Leetcode 1853. Convert Date Format Solution
- Leetcode 1855. Maximum Distance Between a Pair of Values Solution
- Leetcode 1856. Maximum Subarray Min-Product Solution
- 2534 - Time Taken to Cross the Door | Leetcode Solution