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187 problems

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Array578 Dynamic Programming332 String191 Math187 Binary Search136 Hash Table134 Sorting106 Greedy104 Bit Manipulation103 Graph96 Depth-First Search91 Heap (Priority Queue)78 Prefix Sum77 Matrix75 Breadth-First Search71 All topics

Hard · 187 results

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TitleSolutionAcceptDifficultyTopics

1453. Maximum Number of Darts Inside of a Circular DartboardVideo

Solution41.8%Hard

Array, Geometry +1· 1 company

1467. Probability of a Two Boxes Having The Same Number of Distinct BallsVideo

Solution61.7%Hard

Array, Backtracking +4

1478. Allocate MailboxesVideo

Solution57.1%Hard

Array, Dynamic Programming +2· 4 companies

1510. Stone Game IVVideo

Solution65.2%Hard

Dynamic Programming, Game Theory +1· 1 company

1515. Best Position for a Service CentreVideo

Solution35.8%Hard

Array, Geometry +2· 1 company

1563. Stone Game VVideo

Solution58.8%Hard

Array, Dynamic Programming +2· 1 company

1569. Number of Ways to Reorder Array to Get Same BSTVideo

Solution65.8%Hard

Array, Binary Search Tree +8· 2 companies

1610. Maximum Number of Visible PointsVideo

Solution38.1%Hard

Array, Geometry +3· 6 companies

1622. Fancy SequenceVideo

Solution41.3%Hard

Design, Math +1· 3 companies

1627. Graph Connectivity With ThresholdVideo

Solution49.9%Hard

Array, Math +2· 1 company

1643. Kth Smallest InstructionsVideo

Solution44.7%Hard

Array, Combinatorics +2· 1 company

1728. Cat and Mouse IIVideo

Solution40.4%Hard

Array, Dynamic Programming +6· 1 company

1735. Count Ways to Make Array With ProductVideo

Solution55.8%Hard

Array, Combinatorics +3· 1 company

1739. Building BoxesVideo

Solution52.5%Hard

Binary Search, Greedy +1

1766. Tree of CoprimesVideo

Solution45.1%Hard

Array, Depth-First Search +3· 1 company

1776. Car Fleet IIVideo

Solution58.4%Hard

Array, Heap (Priority Queue) +3· 3 companies

1799. Maximize Score After N OperationsVideo

Solution57.8%Hard

Array, Backtracking +5· 2 companies

1808. Maximize Number of Nice DivisorsVideo

Solution37.3%Hard

Math, Number Theory +1· 1 company

1819. Number of Different Subsequences GCDsVideo

Solution47.2%Hard

Array, Counting +2· 2 companies

1830. Minimum Number of Operations to Make String SortedVideo

Solution50.4%Hard

Combinatorics, Math +1· 1 company

1835. Find XOR Sum of All Pairs Bitwise ANDVideo

Solution62.6%Hard

Array, Bit Manipulation +1· 1 company

1840. Maximum Building HeightVideo

Solution67.1%Hard

Array, Math +1· 6 companies

1862. Sum of Floored PairsVideo

Solution31.4%Hard

Array, Binary Search +2

1866. Number of Ways to Rearrange Sticks With K Sticks VisibleVideo

Solution62.7%Hard

Combinatorics, Dynamic Programming +1· 1 company

1872. Stone Game VIIIVideo

Solution75.2%Hard

Array, Dynamic Programming +3· 1 company

1896. Minimum Cost to Change the Final Value of ExpressionVideo

Solution50.0%Hard

Dynamic Programming, Math +2· 1 company

1916. Count Ways to Build Rooms in an Ant ColonyVideo

Solution52.4%Hard

Combinatorics, Dynamic Programming +4· 1 company

1924. Erect the Fence IIVideoPremium

–49.4%Hard

Array, Geometry +1· 1 company

1956. Minimum Time For K Virus Variants to SpreadVideoPremium

–49.5%Hard

Array, Binary Search +3

1994. The Number of Good SubsetsVideo

Solution37.8%Hard

Array, Bit Manipulation +3· 2 companies

1998. GCD Sort of an ArrayVideo

Solution51.3%Hard

Array, Math +3· 1 company

2005. Subtree Removal Game with Fibonacci TreeVideoPremium

–54.9%Hard

Binary Tree, Dynamic Programming +3· 1 company

2019. The Score of Students Solving Math ExpressionVideo

Solution34.8%Hard

Array, Dynamic Programming +4· 2 companies

2081. Sum of k-Mirror NumbersVideo

Solution63.7%Hard

Enumeration, Math· 5 companies

2117. Abbreviating the Product of a RangeVideo

Solution25.0%Hard

Math· 1 company

2147. Number of Ways to Divide a Long CorridorVideo

Solution54.6%Hard

Dynamic Programming, Math +1· 3 companies

2183. Count Array Pairs Divisible by KVideo

Solution30.7%Hard

Array, Math +1· 2 companies

2197. Replace Non-Coprime Numbers in ArrayVideo

Solution57.7%Hard

Array, Math +2· 5 companies

2338. Count the Number of Ideal ArraysVideo

Solution57.0%Hard

Combinatorics, Dynamic Programming +2· 4 companies

2344. Minimum Deletions to Make Array DivisibleVideo

Solution61.8%Hard

Array, Heap (Priority Queue) +3· 3 companies

2366. Minimum Replacements to Sort the ArrayVideo

Solution53.4%Hard

Array, Greedy +1· 6 companies

2376. Count Special IntegersVideo

Solution45.2%Hard

Dynamic Programming, Math· 1 company

2440. Create Components With Same ValueVideo

Solution54.0%Hard

Array, Depth-First Search +3· 1 company

2514. Count AnagramsVideo

Solution38.4%Hard

Combinatorics, Counting +3· 1 company

2524. Maximum Frequency Score of a SubarrayVideoPremium

Solution35.7%Hard

Array, Hash Table +3· 1 company

2543. Check if Point Is ReachableVideo

Solution45.5%Hard

Math, Number Theory· 1 company

2584. Split the Array to Make Coprime ProductsVideo

Solution29.3%Hard

Array, Hash Table +2· 1 company

2613. Beautiful PairsVideoPremium

Solution46.9%Hard

Array, Divide and Conquer +4

2647. Color the Triangle RedVideoPremium

Solution58.0%Hard

2681. Power of HeroesVideo

Solution31.4%Hard

Array, Dynamic Programming +3

Showing 51–100 of 187