Coding interview problems
3,736 problems: 937 Easy, 1,914 Medium, 885 Hard. Each runs against hidden tests, in 13 languages; database problems in SQL. Free for members.
Solve them in the app Explore guides
Problems 2,301–2,400 of 3,736
- 2301. Nearest Shared Manager Easy · Graph, Tree, Hash Table
- 2302. Valley Junctions Easy · Graph, Array
- 2303. Right and Down Reach Easy · Graph, Matrix, Dynamic Programming
- 2304. Light Truck Routing Easy · Graph, Breadth-First Search
- 2305. Same Map, Different Order Easy · Graph, Hash Table, Sorting
- 2306. Detour Around the Closed Station Easy · Graph, Breadth-First Search
- 2307. The Doubling Machine Easy · Graph, Breadth-First Search, Queue
- 2308. Best Friend Pairs Easy · Graph, Array
- 2309. Land Without a Shore Route Medium · Graph, Breadth-First Search, Matrix
- 2310. Capture the Surrounded Stones Medium · Graph, Depth-First Search, Matrix
- 2311. Outline a Painted Region Medium · Graph, Depth-First Search, Matrix
- 2312. Distinct Cookie-Cutter Shapes Medium · Graph, Depth-First Search, Matrix, Hash Table
- 2313. Islands Inside the Old Map Medium · Graph, Depth-First Search, Matrix
- 2314. Nearest Door Out of the Hedge Maze Medium · Graph, Breadth-First Search, Matrix, Queue
- 2315. Knight on an Endless Board Medium · Graph, Breadth-First Search, Math
- 2316. Rain Reaching Both Seas Medium · Graph, Breadth-First Search, Matrix
- 2317. Portal Board Race Medium · Graph, Breadth-First Search, Array
- 2318. Connected Pipe Tiles Medium · Graph, Depth-First Search, Matrix
- 2319. Regions Split by Mirrors Medium · Graph, Union Find, Matrix, String
- 2320. Narrowest Causeway Medium · Graph, Breadth-First Search, Depth-First Search, Matrix
- 2321. Rolling Marble Reaches the Hole Medium · Graph, Breadth-First Search, Matrix
- 2322. Shortest Marble Roll Medium · Graph, Heap (Priority Queue), Matrix
- 2323. Gentlest Hiking Route Medium · Graph, Heap (Priority Queue), Matrix, Binary Search
- 2324. Widest Safe Corridor Medium · Graph, Heap (Priority Queue), Matrix
- 2325. Letter Loop in the Grid Medium · Graph, Depth-First Search, Matrix
- 2326. Gold Mine Tour Medium · Graph, Backtracking, Matrix
- 2327. Every Path From Entry to Exit Medium · Graph, Backtracking, Depth-First Search
- 2328. Nodes That Always Halt Medium · Graph, Depth-First Search, Topological Sort
- 2329. Point Every Road to the Capital Medium · Graph, Depth-First Search
- 2330. Carpool to the Summit Medium · Graph, Depth-First Search, Greedy, Math
- 2331. Pairs That Cannot Meet Medium · Graph, Union Find, Math
- 2332. Rewire to Connect the Lab Medium · Graph, Union Find
- 2333. Strongest Pair of Cities Medium · Graph, Array
- 2334. Two Team Split Medium · Graph, Breadth-First Search
- 2335. Diameter of the Trail Network Medium · Graph, Breadth-First Search, Tree
- 2336. Best Roots for a Shallow Tree Medium · Graph, Breadth-First Search, Topological Sort
- 2337. Time to Spread the Memo Medium · Graph, Depth-First Search, Tree
- 2338. Hop to a Zero Medium · Graph, Breadth-First Search, Array
- 2339. Combination Dial Medium · Graph, Breadth-First Search, String, Hash Table
- 2340. Two Bucket Measure Medium · Graph, Breadth-First Search, Math
- 2341. Alternating Colour Hops Medium · Graph, Breadth-First Search
- 2342. Where Is the Wandering Frog Medium · Graph, Depth-First Search, Tree
- 2343. Fireworks Chain Medium · Graph, Depth-First Search, Math
- 2344. Minimum Spanning Forest Weight Medium · Graph, Union Find, Sorting
- 2345. Complete Friend Circles Medium · Graph, Union Find
- 2346. Heaviest Load Between Depots Medium · Graph, Union Find, Sorting
- 2347. Brightest Constellation Medium · Graph, Sorting, Heap (Priority Queue)
- 2348. Pipeline Capacity Into a Single Tank Medium · Graph, Depth-First Search, Tree
- 2349. First Meeting Point of Two Arrows Medium · Graph, Breadth-First Search
- 2350. Mixed Unlock Rules Medium · Graph, Topological Sort, Queue
- 2351. Peer Pressure Spread Medium · Graph, Breadth-First Search, Queue
- 2352. All Upstream Sources Medium · Graph, Topological Sort, Depth-First Search
- 2353. Quietest Among the Wealthier Medium · Graph, Depth-First Search, Memoization
- 2354. Distance to the Ring Road Medium · Graph, Breadth-First Search, Topological Sort
- 2355. Fewest Terms to Graduate Medium · Graph, Topological Sort, Queue
- 2356. Cheapest Crossing of the Toll Grid Medium · Graph, Heap (Priority Queue), Matrix
- 2357. Project Critical Path Medium · Graph, Topological Sort, Dynamic Programming
- 2358. Stepping Stones Across the River Medium · Graph, Union Find, Math
- 2359. Is a Prerequisite Of Medium · Graph, Topological Sort, Depth-First Search
- 2360. Zigzag Hike Medium · Array, Breadth-First Search, Matrix, Graph
- 2361. Only One Valid Order Medium · Graph, Topological Sort, Queue
- 2362. Where Should the Friends Meet Medium · Graph, Breadth-First Search, Matrix
- 2363. Dishes You Can Cook Medium · Graph, Topological Sort, Hash Table, String
- 2364. Busiest Checkpoint in the Tree Medium · Tree, Graph, Depth-First Search, Math
- 2365. Longest Dependency Chain Medium · Graph, Topological Sort, Dynamic Programming
- 2366. Broadcast in Rounds Medium · Tree, Greedy, Sorting, Depth-First Search, Dynamic Programming
- 2367. Count Routes Through the DAG Medium · Graph, Topological Sort, Dynamic Programming
- 2368. Who Is Ranked for Sure Medium · Graph, Dynamic Programming
- 2369. Alphabetically First Schedule Medium · Graph, Topological Sort, Heap (Priority Queue)
- 2370. Allowed Swaps Puzzle Medium · Graph, Breadth-First Search, String, Hash Table
- 2371. Show Me the Loop Medium · Graph, Depth-First Search
- 2372. The Extra Cable Medium · Graph, Union Find
- 2373. Merge Contact Cards Medium · Graph, Union Find, Hash Table, String, Sorting
- 2374. Tunnel Through Up to K Walls Hard · Graph, Breadth-First Search, Matrix
- 2375. Equal and Unequal Labels Medium · Graph, Union Find, String
- 2376. Fix the Conveyor Arrows Hard · Graph, Breadth-First Search, Matrix, Queue
- 2377. Smallest Equivalent Spelling Medium · Graph, Union Find, String
- 2378. Reclaim One Square of Sea Hard · Graph, Depth-First Search, Matrix, Hash Table
- 2379. Anagram Cousins Medium · Graph, Union Find, String
- 2380. Islands Rising From the Sea Hard · Graph, Union Find, Matrix
- 2381. Clear the Shelf Pegs Medium · Graph, Union Find, Depth-First Search
- 2382. Bricks Hanging From the Ceiling Hard · Graph, Union Find, Matrix
- 2383. Smallest After Group Swaps Medium · Graph, Union Find, String, Sorting
- 2384. Crossing at High Tide Hard · Graph, Heap (Priority Queue), Matrix, Binary Search
- 2385. First Day Everyone Is Linked Medium · Graph, Union Find, Sorting
- 2386. Cheapest Irrigation Grid Medium · Graph, Union Find, Sorting, Greedy
- 2387. Wire Up the Sensors Medium · Graph, Heap (Priority Queue), Greedy
- 2388. Mandatory Link Spanning Tree Medium · Graph, Union Find, Sorting, Greedy
- 2389. Sort by Swapping Any Two Medium · Graph, Array, Sorting
- 2390. Altitude Difference Ledger Medium · Graph, Union Find, Hash Table
- 2391. Cheapest Trip With Few Layovers Medium · Graph, Dynamic Programming
- 2392. Most Reliable Relay Medium · Graph, Heap (Priority Queue)
- 2393. How Many Fastest Routes Medium · Graph, Heap (Priority Queue), Dynamic Programming
- 2394. Coupon-Cut Fares Medium · Graph, Heap (Priority Queue)
- 2395. Quietest Town Within Reach Medium · Graph, Dynamic Programming
- 2396. Towns With a Toll Booth Medium · Graph, Heap (Priority Queue)
- 2397. Fewest Arrows to Reverse Medium · Graph, Breadth-First Search, Queue
- 2398. Spot the Money Loop Medium · Graph, Dynamic Programming
- 2399. Distance Lookup Table Medium · Graph, Dynamic Programming
- 2400. Cheapest Letter Rewrite Medium · Graph, String, Dynamic Programming
