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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

3518. Smallest Palindromic Rearrangement IIVideo

Solution44.3%Hard

Combinatorics, Counting +3

3519. Count Numbers with Non-Decreasing Digits Video

–37.3%Hard

Dynamic Programming, Math +1

3525. Find X Value of Array IIVideo

Solution70.4%Hard

Array, Math +1· 1 company

3539. Find Sum of Array Product of Magical SequencesVideo

Solution61.9%Hard

Array, Bit Manipulation +4· 2 companies

3547. Maximum Sum of Edge Values in a GraphVideo

–35.4%Hard

Graph, Greedy +1· 1 company

3549. Multiply Two PolynomialsVideoPremium

Solution59.2%Hard

3559. Number of Ways to Assign Edge Weights IIVideo

Solution71.8%Hard

Array, Bit Manipulation +4· 3 companies

3569. Maximize Count of Distinct Primes After SplitVideo

–19.0%Hard

Array, Math +2· 1 company

3574. Maximize Subarray GCD ScoreVideo

Solution25.5%Hard

Array, Enumeration +2· 1 company

3605. Minimum Stability Factor of ArrayVideo

–20.4%Hard

Array, Binary Search +4· 1 company

3609. Minimum Moves to Reach Target in GridVideo

–15.5%Hard

Math· 1 company

3621. Number of Integers With Popcount-Depth Equal to K IVideo

–23.0%Hard

Bit Manipulation, Combinatorics +2

3625. Count Number of Trapezoids IIVideo

Solution40.0%Hard

Array, Geometry +2· 2 companies

3630. Partition Array for Maximum XOR and ANDVideo

–17.6%Hard

Array, Bit Manipulation +3· 1 company

3666. Minimum Operations to Equalize Binary StringVideo

Solution45.2%Hard

Breadth-First Search, Math +3· 4 companies

3671. Sum of Beautiful SubsequencesVideo

–31.5%Hard

Array, Binary Indexed Tree +2· 2 companies

3677. Count Binary Palindromic NumbersVideo

–33.2%Hard

Bit Manipulation, Math

3681. Maximum XOR of SubsequencesVideo

–49.5%Hard

Array, Bit Manipulation +2

3700. Number of ZigZag Arrays IIVideo

Solution67.7%Hard

Dynamic Programming, Math· 3 companies

3704. Count No-Zero Pairs That Sum to NVideo

Solution15.6%Hard

Dynamic Programming, Math

3715. Sum of Perfect Square AncestorsVideo

–41.3%Hard

Array, Counting +5· 3 companies

3725. Count Ways to Choose Coprime Integers from RowsVideo

–46.8%Hard

Array, Combinatorics +4

3749. Evaluate Valid ExpressionsPremium

Solution69.2%Hard

Divide and Conquer, Hash Table +3

3753. Total Waviness of Numbers in Range IIVideo

Solution56.2%Hard

Dynamic Programming, Math· 4 companies

3757. Number of Effective SubsequencesVideo

–30.4%Hard

Array, Bit Manipulation +3

3762. Minimum Operations to Equalize SubarraysVideo

–20.0%Hard

Array, Binary Search +2

3782. Last Remaining Integer After Alternating Deletion OperationsVideo

–46.3%Hard

Math, Recursion

3821. Find Nth Smallest Integer With K One BitsVideo

Solution34.7%Hard

Bit Manipulation, Combinatorics +1· 1 company

3850. Count Sequences to KVideo

Solution35.6%Hard

Array, Dynamic Programming +3· 2 companies

3855. Sum of K-Digit Numbers in a RangeVideo

Solution46.5%Hard

Combinatorics, Divide and Conquer +2

3869. Count Fancy Numbers in a RangeVideo

Solution26.6%Hard

Dynamic Programming, Math

3886. Sum of Sortable IntegersVideo

Solution55.3%Hard

Array, Enumeration +2

3901. Good Subsequence QueriesVideo

Solution19.9%Hard

Array, Math +2· 2 companies

3953. Maximum Score with Co-Prime ElementVideo

–27.5%Hard

Array, Combinatorics +4· 2 companies

3966. Count Good Integers in a RangeVideo

–49.8%Hard

Dynamic Programming, Math

3971. Maximum Total ValueVideo

–29.7%Hard

Array, Binary Search +2· 1 company

4037. Maximum Valid Split Positions IIVideo

Solution32.2%Hard

Array, Enumeration +2

Showing 151–187 of 187