Problems

3,848+ problems · 928 Easy · 2014 Medium · 906 Hard

Active:Premium· 755 results

Title	Solution	Practice	Difficulty	Companies	Topics
3198. Find Cities in Each State	Solution	Solve	Easy	-	Database
3199. Count Triplets with Even XOR Set Bits I	Solution	Solve	Easy	Amazon	Array Bit Manipulation
3204. Bitwise User Permissions Analysis	Solution	Solve	Medium	-	Database
3205. Maximum Array Hopping Score I	Solution	Solve	Medium	Zluri	Array Dynamic Programming+3
3214. Year on Year Growth Rate	Solution	Solve	Hard	Amazon	Database
3215. Count Triplets with Even XOR Set Bits II	Solution	Solve	Medium	Amazon	Array Bit Manipulation
3221. Maximum Array Hopping Score II	Solution	Solve	Medium	Zluri	Array Greedy+2
3230. Customer Purchasing Behavior Analysis	Solution	Solve	Medium	Amazon	Database
3231. Minimum Number of Increasing Subsequence to Be Removed	Solution	Solve	Hard	-	Array Binary Search
3236. CEO Subordinate Hierarchy	Solution	Solve	Hard	-	Database
3237. Alt and Tab Simulation	Solution	Solve	Medium	-	Array Hash Table+1
3246. Premier League Table Ranking	Solution	Solve	Easy	-	Database
3247. Number of Subsequences with Odd Sum	Solution	Solve	Medium	-	Array Combinatorics+2
3252. Premier League Table Ranking II	Solution	Solve	Medium	-	Database
3253. Construct String with Minimum Cost (Easy)	Solution	Solve	Medium	-
3262. Find Overlapping Shifts	Solution	Solve	Medium	-	Database
3263. Convert Doubly Linked List to Array I	Solution	Solve	Easy	-	Array Doubly-Linked List+1
3268. Find Overlapping Shifts II	Solution	Solve	Hard	-	Database
3269. Constructing Two Increasing Arrays	Solution	Solve	Hard	-	Array Dynamic Programming
3278. Find Candidates for Data Scientist Position II	Solution	Solve	Medium	-	Database
3279. Maximum Total Area Occupied by Pistons	Solution	Solve	Hard	-	Array Counting+4
3284. Sum of Consecutive Subarrays	Solution	Solve	Medium	-	Array Dynamic Programming+1
3293. Calculate Product Final Price	Solution	Solve	Medium	-	Database
3294. Convert Doubly Linked List to Array II	Solution	Solve	Medium	-	Array Doubly-Linked List+1
3299. Sum of Consecutive Subsequences	Solution	Solve	Hard	-	Array Dynamic Programming+1
3308. Find Top Performing Driver	Solution	Solve	Medium	-	Database
3313. Find the Last Marked Nodes in Tree	Solution	Solve	Hard	Salesforce	Depth-First Search Tree
3322. Premier League Table Ranking III	Solution	Solve	Medium	-	Database
3323. Minimize Connected Groups by Inserting Interval	Solution	Solve	Medium	De Shaw	Array Binary Search+2
3328. Find Cities in Each State II	Solution	Solve	Medium	-	Database
3329. Count Substrings With K-Frequency Characters II	Solution	Solve	Hard	-	Hash Table Sliding Window+1
3338. Second Highest Salary II	Solution	Solve	Medium	-	Database
3339. Find the Number of K-Even Arrays	Solution	Solve	Medium	-	Dynamic Programming
3344. Maximum Sized Array	Solution	Solve	Medium	-	Binary Search Bit Manipulation
3353. Minimum Total Operations	Solution	Solve	Easy	-	Array
3358. Books with NULL Ratings	Solution	Solve	Easy	-	Database
3359. Find Sorted Submatrices With Maximum Element at Most K	Solution	Solve	Hard	-	Array Matrix+2
3368. First Letter Capitalization	Solution	Solve	Hard	-	Database
3369. Design an Array Statistics Tracker	Solution	Solve	Hard	Amazon	Binary Search Hash Table+1
3874. Valid Subarrays With Exactly One Peak	Solution	Solve	Medium	-
3865. Reverse K Subarrays	Solution	Solve	Medium	-	Array Two Pointers
3851. Maximum Requests Without Violating the Limit	Solution	Solve	Medium	-	Array Greedy+3
3860. Unique Email Groups	Solution	Solve	Medium	-	Array Hash Table+1
3837. Delayed Count of Equal Elements	Solution	Solve	Medium	-	Array Counting+1
3831. Median of a Binary Search Tree Level	Solution	Solve	Medium	-	Binary Search Tree Binary Tree+3
3817. Good Indices in a Digit String	Solution	Solve	Medium	-	Math String
3822. Design Order Management System	Solution	Solve	Medium	Optiver	Design Hash Table
3807. Minimum Cost to Repair Edges to Traverse a Graph	Solution	Solve	Medium	-	Binary Search Breadth-First Search+1
3792. Sum of Increasing Product Blocks	Solution	Solve	Medium	-	Math Simulation
3846. Total Distance to Type a String Using One Finger	Solution	Solve	Medium	-	Hash Table String