Dashboard Questions Topics Companies Sheets

Array

Topic

1,779 coding problems covering Array concepts. Master this topic and improve your problem-solving skills.

1,779

Problems

370

Easy

963

Medium

446

Hard

Difficulty

All1779 Easy370 Medium963 Hard446

Title	Solve	Difficulty	Companies	Topics
247. Strobogrammatic Number II	Solve	Medium	Facebook+2	Array Recursion+1
248. Strobogrammatic Number III	Solve	Hard	Google	Array Recursion+1
249. Group Shifted Strings	Solve	Medium	Facebook+1	Array Hash Table+1
251. Flatten 2D Vector	Solve	Medium	Airbnb	Array Design+2
252. Meeting Rooms	Solve	Easy	Amazon+1	Array Sorting
253. Meeting Rooms II	Solve	Medium	Amazon+8	Array Greedy+4
255. Verify Preorder Sequence in Binary Search Tree	Solve	Medium	Oracle+2	Array Binary Search Tree+5
256. Paint House	Solve	Medium	Amazon+2	Array Dynamic Programming
259. 3Sum Smaller	Solve	Medium	Apple+2	Array Binary Search+2
260. Single Number III	Solve	Medium	Google	Array Bit Manipulation
265. Paint House II	Solve	Hard	Facebook+2	Array Dynamic Programming
268. Missing Number	Solve	Easy	Adobe+8	Array Binary Search+4
269. Alien Dictionary	Solve	Hard	Airbnb+8	Array Breadth-First Search+4
271. Encode and Decode Strings	Solve	Medium	Facebook+1	Array Design+1
274. H-Index	Solve	Medium	Alation+4	Array Counting Sort+1
275. H-Index II	Solve	Medium	Goldman Sachs	Array Binary Search
280. Wiggle Sort	Solve	Medium	Amazon+2	Array Greedy+1
281. Zigzag Iterator	Solve	Medium	Amazon+3	Array Design+2
283. Move Zeroes	Solve	Easy	Adobe+11	Array Two Pointers
284. Peeking Iterator	Solve	Medium	Amazon+3	Array Design+1
286. Walls and Gates	Solve	Medium	Amazon+6	Array Breadth-First Search+1
287. Find the Duplicate Number	Solve	Medium	Adobe+30	Array Binary Search+2
288. Unique Word Abbreviation	Solve	Medium	Facebook+1	Array Design+2
289. Game of Life	Solve	Medium	Adobe+8	Array Matrix+1
296. Best Meeting Point	Solve	Hard	Expedia+2	Array Math+2
300. Longest Increasing Subsequence	Solve	Medium	Accenture+78	Array Binary Search+1
302. Smallest Rectangle Enclosing Black Pixels	Solve	Hard	Google	Array Binary Search+3
303. Range Sum Query - Immutable	Solve	Easy	Facebook	Array Design+1
304. Range Sum Query 2D - Immutable	Solve	Medium	Amazon+4	Array Design+2
305. Number of Islands II	Solve	Hard	Google+1	Array Hash Table+1
307. Range Sum Query - Mutable	Solve	Medium	Amazon+1	Array Binary Indexed Tree+2
308. Range Sum Query 2D - Mutable	Solve	Medium	Google	Array Binary Indexed Tree+3
309. Best Time to Buy and Sell Stock with Cooldown	Solve	Medium	Adobe+5	Array Dynamic Programming
311. Sparse Matrix Multiplication	Solve	Medium	Amazon+3	Array Hash Table+1
312. Burst Balloons	Solve	Hard	Amazon+5	Array Dynamic Programming
313. Super Ugly Number	Solve	Medium	Apple+2	Array Dynamic Programming+1
315. Count of Smaller Numbers After Self	Solve	Hard	Adobe+3	Array Binary Indexed Tree+5
317. Shortest Distance from All Buildings	Solve	Hard	DoorDash+3	Array Breadth-First Search+1
318. Maximum Product of Word Lengths	Solve	Medium	Bloomberg	Array Bit Manipulation+1
321. Create Maximum Number	Solve	Hard	Apple+1	Array Greedy+3
322. Coin Change	Solve	Medium	Amazon+7	Array Breadth-First Search+1
324. Wiggle Sort II	Solve	Medium	Adobe	Array Divide and Conquer+3
325. Maximum Size Subarray Sum Equals k	Solve	Medium	Amazon+1	Array Hash Table+1
327. Count of Range Sum	Solve	Hard	Adobe+2	Array Binary Indexed Tree+5
329. Longest Increasing Path in a Matrix	Solve	Hard	Amazon+14	Array Breadth-First Search+6
330. Patching Array	Solve	Hard	Amazon	Array Greedy
334. Increasing Triplet Subsequence	Solve	Medium	Facebook+1	Array Greedy
335. Self Crossing	Solve	Hard	Amazon+1	Array Geometry+1
336. Palindrome Pairs	Solve	Hard	Airbnb+5	Array Hash Table+2
346. Moving Average from Data Stream	Solve	Easy	Amazon+3	Array Data Stream+2