0300–0399

Problems in this range: 100

• 300. Longest Increasing Subsequence
• 301. Remove Invalid Parentheses
• 302. Smallest Rectangle Enclosing Black Pixels 🔒
• 303. Range Sum Query - Immutable
• 304. Range Sum Query 2D - Immutable
• 305. Number of Islands II 🔒
• 306. Additive Number
• 307. Range Sum Query - Mutable
• 308. Range Sum Query 2D - Mutable 🔒
• 309. Best Time to Buy and Sell Stock with Cooldown
• 310. Minimum Height Trees
• 311. Sparse Matrix Multiplication 🔒
• 312. Burst Balloons
• 313. Super Ugly Number
• 314. Binary Tree Vertical Order Traversal 🔒
• 315. Count of Smaller Numbers After Self
• 316. Remove Duplicate Letters
• 317. Shortest Distance from All Buildings 🔒
• 318. Maximum Product of Word Lengths
• 319. Bulb Switcher
• 320. Generalized Abbreviation 🔒
• 321. Create Maximum Number
• 322. Coin Change
• 323. Number of Connected Components in an Undirected Graph 🔒
• 324. Wiggle Sort II
• 325. Maximum Size Subarray Sum Equals k 🔒
• 326. Power of Three
• 327. Count of Range Sum
• 328. Odd Even Linked List
• 329. Longest Increasing Path in a Matrix
• 330. Patching Array
• 331. Verify Preorder Serialization of a Binary Tree
• 332. Reconstruct Itinerary
• 333. Largest BST Subtree 🔒
• 334. Increasing Triplet Subsequence
• 335. Self Crossing
• 336. Palindrome Pairs
• 337. House Robber III
• 338. Counting Bits
• 339. Nested List Weight Sum 🔒
• 340. Longest Substring with At Most K Distinct Characters 🔒
• 341. Flatten Nested List Iterator
• 342. Power of Four
• 343. Integer Break
• 344. Reverse String
• 345. Reverse Vowels of a String
• 346. Moving Average from Data Stream 🔒
• 347. Top K Frequent Elements
• 348. Design Tic-Tac-Toe 🔒
• 349. Intersection of Two Arrays
• 350. Intersection of Two Arrays II
• 351. Android Unlock Patterns 🔒
• 352. Data Stream as Disjoint Intervals
• 353. Design Snake Game 🔒
• 354. Russian Doll Envelopes
• 355. Design Twitter
• 356. Line Reflection 🔒
• 357. Count Numbers with Unique Digits
• 358. Rearrange String k Distance Apart 🔒
• 359. Logger Rate Limiter 🔒
• 360. Sort Transformed Array 🔒
• 361. Bomb Enemy 🔒
• 362. Design Hit Counter 🔒
• 363. Max Sum of Rectangle No Larger Than K
• 364. Nested List Weight Sum II 🔒
• 365. Water and Jug Problem
• 366. Find Leaves of Binary Tree 🔒
• 367. Valid Perfect Square
• 368. Largest Divisible Subset
• 369. Plus One Linked List 🔒
• 370. Range Addition 🔒
• 371. Sum of Two Integers
• 372. Super Pow
• 373. Find K Pairs with Smallest Sums
• 374. Guess Number Higher or Lower
• 375. Guess Number Higher or Lower II
• 376. Wiggle Subsequence
• 377. Combination Sum IV
• 378. Kth Smallest Element in a Sorted Matrix
• 379. Design Phone Directory 🔒
• 380. Insert Delete GetRandom O(1)
• 381. Insert Delete GetRandom O(1) - Duplicates allowed
• 382. Linked List Random Node
• 383. Ransom Note
• 384. Shuffle an Array
• 385. Mini Parser
• 386. Lexicographical Numbers
• 387. First Unique Character in a String
• 388. Longest Absolute File Path
• 389. Find the Difference
• 390. Elimination Game
• 391. Perfect Rectangle
• 392. Is Subsequence
• 393. UTF-8 Validation
• 394. Decode String
• 395. Longest Substring with At Least K Repeating Characters
• 396. Rotate Function
• 397. Integer Replacement
• 398. Random Pick Index
• 399. Evaluate Division