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Problems

187 problems

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

Hard · 187 results

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TitleSolutionAcceptDifficultyTopics
2709. Greatest Common Divisor TraversalVideo
Solution41.6%Hard
Array, Math +2
2719. Count of IntegersVideo
Solution38.9%Hard
Dynamic Programming, Math +1· 2 companies
2790. Maximum Number of Groups With Increasing LengthVideo
Solution23.0%Hard
Array, Binary Search +3· 1 company
2818. Apply Operations to Maximize ScoreVideo
Solution53.7%Hard
Array, Greedy +4· 2 companies
2827. Number of Beautiful Integers in the RangeVideo
Solution23.1%Hard
Dynamic Programming, Math· 1 company
2842. Count K-Subsequences of a String With Maximum BeautyVideo
Solution30.2%Hard
Combinatorics, Greedy +3· 1 company
2851. String TransformationVideo
Solution27.4%Hard
Dynamic Programming, Math +2· 3 companies
2862. Maximum Element-Sum of a Complete Subset of IndicesVideo
Solution42.9%Hard
Array, Math +1· 1 company
2867. Count Valid Paths in a TreeVideo
Solution36.2%Hard
Depth-First Search, Dynamic Programming +3· 1 company
2868. The Wording GamePremium
Solution53.6%Hard
Array, Game Theory +4
2912. Number of Ways to Reach Destination in the GridPremium
Solution57.7%Hard
Combinatorics, Dynamic Programming +1· 1 company
2927. Distribute Candies Among Children IIIVideoPremium
Solution57.3%Hard
Combinatorics, Math· 2 companies
2941. Maximum GCD-Sum of a SubarrayVideoPremium
Solution39.9%Hard
Array, Binary Search +2· 1 company
2949. Count Beautiful Substrings IIVideo
Solution27.5%Hard
Hash Table, Math +3· 1 company
2954. Count the Number of Infection SequencesVideo
Solution36.7%Hard
Array, Combinatorics +1· 6 companies
2963. Count the Number of Good PartitionsVideo
Solution49.3%Hard
Array, Combinatorics +2· 1 company
2999. Count the Number of Powerful IntegersVideo
Solution46.3%Hard
Dynamic Programming, Math +1· 5 companies
3009. Maximum Number of Intersections on the ChartVideoPremium
Solution45.5%Hard
Array, Binary Indexed Tree +2· 1 company
3027. Find the Number of Ways to Place People IIVideo
Solution64.4%Hard
Array, Enumeration +3· 3 companies
3102. Minimize Manhattan DistancesVideo
Solution32.9%Hard
Array, Geometry +3
3116. Kth Smallest Amount With Single Denomination CombinationVideo
Solution50.3%Hard
Array, Binary Search +4
3154. Find Number of Ways to Reach the K-th StairVideo
Solution38.2%Hard
Bit Manipulation, Combinatorics +3· 1 company
3235. Check if the Rectangle Corner Is ReachableVideo
Solution24.4%Hard
Array, Breadth-First Search +4· 2 companies
3250. Find the Count of Monotonic Pairs IVideo
Solution47.6%Hard
Array, Combinatorics +3· 2 companies
3251. Find the Count of Monotonic Pairs IIVideo
Solution24.7%Hard
Array, Combinatorics +3· 1 company
3260. Find the Largest Palindrome Divisible by KVideo
Solution17.0%Hard
Dynamic Programming, Greedy +3· 2 companies
3272. Find the Count of Good IntegersVideo
Solution69.5%Hard
Combinatorics, Enumeration +2· 2 companies
3283. Maximum Number of Moves to Kill All PawnsVideo
Solution33.7%Hard
Array, Bit Manipulation +4· 1 company
3307. Find the K-th Character in String Game IIVideo
Solution48.5%Hard
Bit Manipulation, Math +1· 3 companies
3312. Sorted GCD Pair QueriesVideo
Solution58.4%Hard
Array, Binary Search +6· 1 company
3317. Find the Number of Possible Ways for an EventVideo
Solution34.8%Hard
Combinatorics, Dynamic Programming +1· 1 company
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
3348. Smallest Divisible Digit Product IIVideo
Solution45.3%Hard
Backtracking, Greedy +3· 3 companies
3352. Count K-Reducible Numbers Less Than NVideo
Solution27.8%Hard
Combinatorics, Dynamic Programming +2· 1 company
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
3395. Subsequences with a Unique Middle Mode IVideo
–20.7%Hard
Array, Combinatorics +2
3405. Count the Number of Arrays with K Matching Adjacent ElementsVideo
Solution58.3%Hard
Combinatorics, Math· 5 companies
3416. Subsequences with a Unique Middle Mode IIPremium
–16.3%Hard
Array, Combinatorics +2
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
3444. Minimum Increments for Target Multiples in an ArrayVideo
–27.5%Hard
Array, Bit Manipulation +4
3463. Check If Digits Are Equal in String After Operations IIVideo
–14.3%Hard
Combinatorics, Math +2· 2 companies
3464. Maximize the Distance Between Points on a SquareVideo
Solution51.3%Hard
Array, Binary Search +3· 2 companies
3470. Permutations IVVideo
–32.8%Hard
Array, Combinatorics +2
3495. Minimum Operations to Make Array Elements ZeroVideo
Solution60.4%Hard
Array, Bit Manipulation +1· 4 companies
3505. Minimum Operations to Make Elements Within K Subarrays EqualVideo
–27.8%Hard
Array, Dynamic Programming +4
3506. Find Time Required to Eliminate Bacterial StrainsPremium
Solution63.2%Hard
Array, Greedy +2
Showing 101–150 of 187