Dashboard Questions Topics Companies Sheets

Data Structures & Algorithms

Practice 3,374+ coding problems from top companies. Master DSA concepts and ace your interviews.

3,374

Problems

840

Easy

1762

Medium

772

Hard

Difficulty

All3374 Easy840 Medium1762 Hard772

Title	Solve	Difficulty	Companies	Topics
351. Android Unlock Patterns	Solve	Medium	Microsoft+1	Backtracking Bit Manipulation+2
352. Data Stream as Disjoint Intervals	Solve	Hard	Microsoft	Binary Search Design+1
353. Design Snake Game	Solve	Medium	Amazon+6	Array Design+3
354. Russian Doll Envelopes	Solve	Hard	Google+1	Array Binary Search+2
355. Design Twitter	Solve	Medium	Amazon+2	Design Hash Table+2
356. Line Reflection	Solve	Medium	Yandex	Array Hash Table+1
357. Count Numbers with Unique Digits	Solve	Medium	Bloomberg	Backtracking Dynamic Programming+1
358. Rearrange String k Distance Apart	Solve	Hard	Google+3	Counting Greedy+4
359. Logger Rate Limiter	Solve	Easy	Amazon+5	Data Stream Design+1
360. Sort Transformed Array	Solve	Medium	LinkedIn	Array Math+2
361. Bomb Enemy	Solve	Medium	Uber	Array Dynamic Programming+1
362. Design Hit Counter	Solve	Medium	Affirm+7	Array Binary Search+3
363. Max Sum of Rectangle No Larger Than K	Solve	Hard	Dunzo	Array Binary Search+3
364. Nested List Weight Sum II	Solve	Medium	LinkedIn	Breadth-First Search Depth-First Search+1
365. Water and Jug Problem	Solve	Medium	Lyft	Breadth-First Search Depth-First Search+1
366. Find Leaves of Binary Tree	Solve	Medium	Amazon+4	Binary Tree Depth-First Search+1
367. Valid Perfect Square	Solve	Easy	Google+1	Binary Search Math
368. Largest Divisible Subset	Solve	Medium	Google	Array Dynamic Programming+2
369. Plus One Linked List	Solve	Medium	Google	Linked List Math
370. Range Addition	Solve	Medium	Amazon+1	Array Prefix Sum
371. Sum of Two Integers	Solve	Medium	Facebook	Bit Manipulation Math
372. Super Pow	Solve	Medium	Adobe	Divide and Conquer Math
373. Find K Pairs with Smallest Sums	Solve	Medium	Amazon+4	Array Heap (Priority Queue)
374. Guess Number Higher or Lower	Solve	Easy	Adobe+1	Binary Search Interactive
375. Guess Number Higher or Lower II	Solve	Medium	Google	Dynamic Programming Game Theory+1
376. Wiggle Subsequence	Solve	Medium	Bloomberg	Array Dynamic Programming+1
377. Combination Sum IV	Solve	Medium	Adobe+9	Array Dynamic Programming
378. Kth Smallest Element in a Sorted Matrix	Solve	Medium	Adobe+7	Array Binary Search+3
379. Design Phone Directory	Solve	Medium	Amazon+1	Array Design+3
380. Insert Delete GetRandom O(1)	Solve	Medium	Affirm+8	Array Design+3
381. Insert Delete GetRandom O(1) - Duplicates allowed	Solve	Hard	Affirm+2	Array Design+3
382. Linked List Random Node	Solve	Medium	Amazon+2	Linked List Math+2
383. Ransom Note	Solve	Easy	Adobe+3	Counting Hash Table+1
384. Shuffle an Array	Solve	Medium	Apple+4	Array Design+2
385. Mini Parser	Solve	Medium	Airbnb	Depth-First Search Stack+1
386. Lexicographical Numbers	Solve	Medium	Amazon+6	Depth-First Search Trie
387. First Unique Character in a String	Solve	Easy	Amazon+8	Counting Hash Table+2
388. Longest Absolute File Path	Solve	Medium	Amazon+1	Depth-First Search Stack+1
389. Find the Difference	Solve	Easy	Adobe+4	Bit Manipulation Hash Table+2
390. Elimination Game	Solve	Medium	Adobe+2	Math Recursion
391. Perfect Rectangle	Solve	Hard	Apple+1	Array Line Sweep
392. Is Subsequence	Solve	Easy	Accolite+15	Dynamic Programming String+1
393. UTF-8 Validation	Solve	Medium	Facebook+1	Array Bit Manipulation
394. Decode String	Solve	Medium	Adobe+16	Recursion Stack+1
395. Longest Substring with At Least K Repeating Characters	Solve	Medium	Amazon+1	Divide and Conquer Hash Table+2
396. Rotate Function	Solve	Medium	Amazon+2	Array Dynamic Programming+1
397. Integer Replacement	Solve	Medium	Bloomberg	Bit Manipulation Dynamic Programming+2
398. Random Pick Index	Solve	Medium	Amazon+2	Hash Table Math+2
399. Evaluate Division	Solve	Medium	Adobe+8	Array Breadth-First Search+5
400. Nth Digit	Solve	Medium	Apple	Binary Search Math