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
2351. First Letter to Appear Twice	Solve	Easy	Google	Bit Manipulation Counting+2
2352. Equal Row and Column Pairs	Solve	Medium	D.E. Shaw	Array Hash Table+2
2353. Design a Food Rating System	Solve	Medium	Amazon	Design Hash Table+2
2354. Number of Excellent Pairs	Solve	Hard	epiFi	Array Binary Search+2
2355. Maximum Number of Books You Can Take	Solve	Hard	Amazon	Array Dynamic Programming+2
2356. Number of Unique Subjects Taught by Each Teacher	Solve	Easy	Capgemini	Database
2357. Make Array Zero by Subtracting Equal Amounts	Solve	Easy	Amazon	Array Greedy+4
2358. Maximum Number of Groups Entering a Competition	Solve	Medium	-	Array Binary Search+2
2359. Find Closest Node to Given Two Nodes	Solve	Medium	Juspay	Depth-First Search Graph
2360. Longest Cycle in a Graph	Solve	Hard	Juspay+2	Depth-First Search Graph+1
2361. Minimum Costs Using the Train Line	Solve	Hard	Citadel	Array Dynamic Programming
2362. Generate the Invoice	Solve	Hard	-	Database
2363. Merge Similar Items	Solve	Easy	Google	Array Hash Table+2
2364. Count Number of Bad Pairs	Solve	Medium	Google	Array Counting+2
2365. Task Scheduler II	Solve	Medium	Facebook+1	Array Hash Table+1
2366. Minimum Replacements to Sort the Array	Solve	Hard	Expedia+1	Array Greedy+1
2367. Number of Arithmetic Triplets	Solve	Easy	-	Array Enumeration+2
2368. Reachable Nodes With Restrictions	Solve	Medium	MakeMyTrip	Array Breadth-First Search+5
2369. Check if There is a Valid Partition For The Array	Solve	Medium	Google	Array Dynamic Programming
2370. Longest Ideal Subsequence	Solve	Medium	MakeMyTrip	Dynamic Programming Hash Table+1
2371. Minimize Maximum Value in a Grid	Solve	Hard	Google	Array Graph+4
2372. Calculate the Influence of Each Salesperson	Solve	Medium	-	Database
2373. Largest Local Values in a Matrix	Solve	Easy	Google	Array Matrix
2374. Node With Highest Edge Score	Solve	Medium	Juspay	Graph Hash Table
2375. Construct Smallest Number From DI String	Solve	Medium	Amazon+1	Backtracking Greedy+2
2376. Count Special Integers	Solve	Hard	Adobe+2	Dynamic Programming Math
2377. Sort the Olympic Table	Solve	Easy	-	Database
2378. Choose Edges to Maximize Score in a Tree	Solve	Medium	Sprinklr	Depth-First Search Dynamic Programming+1
2379. Minimum Recolors to Get K Consecutive Black Blocks	Solve	Easy	DailyHunt	Sliding Window String
2380. Time Needed to Rearrange a Binary String	Solve	Medium	Amazon+1	Dynamic Programming Simulation+1
2381. Shifting Letters II	Solve	Medium	Veritas	Array Prefix Sum+1
2382. Maximum Segment Sum After Removals	Solve	Hard	Infosys	Array Ordered Set+2
2383. Minimum Hours of Training to Win a Competition	Solve	Easy	-	Array Greedy
2384. Largest Palindromic Number	Solve	Medium	Adobe+3	Counting Greedy+2
2385. Amount of Time for Binary Tree to Be Infected	Solve	Medium	Adobe+6	Binary Tree Breadth-First Search+3
2386. Find the K-Sum of an Array	Solve	Hard	Amazon	Array Heap (Priority Queue)+1
2387. Median of a Row Wise Sorted Matrix	Solve	Medium	DE Shaw	Array Binary Search+1
2388. Change Null Values in a Table to the Previous Value	Solve	Medium	Deloitte	Database
2389. Longest Subsequence With Limited Sum	Solve	Easy	Adobe	Array Binary Search+3
2390. Removing Stars From a String	Solve	Medium	Amazon	Simulation Stack+1
2391. Minimum Amount of Time to Collect Garbage	Solve	Medium	Microsoft	Array Prefix Sum+1
2392. Build a Matrix With Conditions	Solve	Hard	Apple+1	Array Graph+2
2393. Count Strictly Increasing Subarrays	Solve	Medium	Bridgewater Associates	Array Dynamic Programming+1
2394. Employees With Deductions	Solve	Medium	Amazon	Database
2395. Find Subarrays With Equal Sum	Solve	Easy	Adobe+1	Array Hash Table
2396. Strictly Palindromic Number	Solve	Medium	Amazon+1	Brainteaser Math+1
2397. Maximum Rows Covered by Columns	Solve	Medium	Apple	Array Backtracking+3
2398. Maximum Number of Robots Within Budget	Solve	Hard	Amazon+1	Array Binary Search+5
2399. Check Distances Between Same Letters	Solve	Easy	-	Array Hash Table+1
2400. Number of Ways to Reach a Position After Exactly k Steps	Solve	Medium	Amazon	Combinatorics Dynamic Programming+1