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Problems

985 problems

Has videoPremium onlyReset
Array578Dynamic Programming332String191Math187Binary Search136Hash Table134Sorting106Greedy104Bit Manipulation103Graph96Depth-First Search91Heap (Priority Queue)78Prefix Sum77Matrix75Breadth-First Search71All topics

Hard · 985 results

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TitleSolutionAcceptDifficultyTopics
3313. Find the Last Marked Nodes in TreeVideoPremium
Solution57.1%Hard
Depth-First Search, Tree· 1 company
3317. Find the Number of Possible Ways for an EventVideo
Solution34.8%Hard
Combinatorics, Dynamic Programming +1· 1 company
3320. Count The Number of Winning SequencesVideo
Solution32.4%Hard
Dynamic Programming, String· 1 company
3321. Find X-Sum of All K-Long Subarrays IIVideo
Solution41.1%Hard
Array, Hash Table +2· 2 companies
3327. Check if DFS Strings Are PalindromesVideo
Solution20.9%Hard
Array, Depth-First Search +4· 1 company
3329. Count Substrings With K-Frequency Characters IIVideoPremium
Solution72.2%Hard
Hash Table, Sliding Window +1
3333. Find the Original Typed String IIVideo
Solution45.6%Hard
Dynamic Programming, Prefix Sum +1· 5 companies
3336. Find the Number of Subsequences With Equal GCDVideo
Solution66.7%Hard
Array, Dynamic Programming +2· 2 companies
3337. Total Characters in String After Transformations IIVideo
Solution58.0%Hard
Counting, Dynamic Programming +3· 2 companies
3343. Count Number of Balanced PermutationsVideo
Solution49.1%Hard
Combinatorics, Dynamic Programming +2· 2 companies
3347. Maximum Frequency of an Element After Performing Operations IIVideo
Solution53.8%Hard
Array, Binary Search +3· 3 companies
3348. Smallest Divisible Digit Product IIVideo
Solution45.3%Hard
Backtracking, Greedy +3· 3 companies
3351. Sum of Good SubsequencesVideo
Solution30.9%Hard
Array, Dynamic Programming +1· 1 company
3352. Count K-Reducible Numbers Less Than NVideo
Solution27.8%Hard
Combinatorics, Dynamic Programming +2· 1 company
3357. Minimize the Maximum Adjacent Element DifferenceVideo
Solution20.2%Hard
Array, Binary Search +1· 1 company
3359. Find Sorted Submatrices With Maximum Element at Most KPremium
–52.5%Hard
Array, Matrix +2
3363. Find the Maximum Number of Fruits CollectedVideo
Solution65.1%Hard
Array, Dynamic Programming +1· 2 companies
3367. Maximize Sum of Weights after Edge RemovalsVideo
Solution33.1%Hard
Depth-First Search, Dynamic Programming +2· 1 company
3368. First Letter CapitalizationVideoPremium
Solution86.8%Hard
Database
3369. Design an Array Statistics Tracker VideoPremium
Solution35.7%Hard
Binary Search, Hash Table +1· 1 company
3373. Maximize the Number of Target Nodes After Connecting Trees IIVideo
Solution72.5%Hard
Breadth-First Search, Depth-First Search +1· 2 companies
3374. First Letter Capitalization IIVideo
Solution32.2%Hard
Database
3378. Count Connected Components in LCM GraphVideo
Solution31.3%Hard
Array, Hash Table +3
3382. Maximum Area Rectangle With Point Constraints IIVideo
–24.0%Hard
Array, Binary Indexed Tree +4· 2 companies
3383. Minimum Runes to Add to Cast SpellPremium
Solution45.2%Hard
Array, Breadth-First Search +4· 1 company
3384. Team Dominance by Pass SuccessPremium
Solution72.1%Hard
–
3385. Minimum Time to Break Locks IIPremium
Solution45.7%Hard
Array, Depth-First Search +1· 1 company
3389. Minimum Operations to Make Character Frequencies EqualVideo
–25.8%Hard
Counting, Dynamic Programming +3· 2 companies
3390. Longest Team Pass StreakPremium
Solution40.2%Hard
–
3395. Subsequences with a Unique Middle Mode IVideo
–20.7%Hard
Array, Combinatorics +2
3398. Smallest Substring With Identical Characters IVideo
Solution21.0%Hard
Array, Binary Search +1· 2 companies
3399. Smallest Substring With Identical Characters IIVideo
Solution39.0%Hard
Binary Search, String· 1 company
3401. Find Circular Gift Exchange ChainsPremium
–50.7%Hard
–
3405. Count the Number of Arrays with K Matching Adjacent ElementsVideo
Solution58.3%Hard
Combinatorics, Math· 5 companies
3406. Find the Lexicographically Largest String From the Box IIVideoPremium
Solution48.9%Hard
String, Two Pointers
3410. Maximize Subarray Sum After Removing All Occurrences of One ElementVideo
–23.0%Hard
Array, Dynamic Programming +1· 2 companies
3414. Maximum Score of Non-overlapping IntervalsVideo
Solution65.9%Hard
Array, Binary Search +2· 2 companies
3416. Subsequences with a Unique Middle Mode IIPremium
–16.3%Hard
Array, Combinatorics +2
3420. Count Non-Decreasing Subarrays After K OperationsVideo
–25.0%Hard
Array, Monotonic Queue +5· 2 companies
3425. Longest Special PathVideo
–23.2%Hard
Array, Depth-First Search +3
3426. Manhattan Distances of All Arrangements of PiecesVideo
–33.5%Hard
Combinatorics, Math· 3 companies
3430. Maximum and Minimum Sums of at Most Size K SubarraysVideo
Solution25.9%Hard
Array, Math +2
3435. Frequencies of Shortest SupersequencesVideo
–22.2%Hard
Array, Bit Manipulation +4· 1 company
3441. Minimum Cost Good CaptionVideo
–20.5%Hard
Dynamic Programming, String· 2 companies
3444. Minimum Increments for Target Multiples in an ArrayVideo
–27.5%Hard
Array, Bit Manipulation +4
3445. Maximum Difference Between Even and Odd Frequency IIVideo
Solution48.7%Hard
Enumeration, Prefix Sum +2· 6 companies
3448. Count Substrings Divisible By Last DigitVideo
–23.7%Hard
Dynamic Programming, String· 1 company
3449. Maximize the Minimum Game ScoreVideo
–26.2%Hard
Array, Binary Search +1· 2 companies
3451. Find Invalid IP AddressesVideo
Solution49.6%Hard
Database
3454. Separate Squares IIVideo
Solution59.2%Hard
Array, Binary Search +2· 2 companies
Showing 751–800 of 985