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Counting Array274 Database207 String109 Hash Table105 Depth-First Search75 Math70 Dynamic Programming69 Sorting61 Tree60 Breadth-First Search51 Binary Tree47 Greedy47 Binary Search46 Matrix38 Two Pointers37 All topics

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TitleSolutionAcceptDifficultyTopics

358. Rearrange String k Distance ApartVideoPremium

Solution39.9%Hard

Counting, Greedy +4· 4 companies

1121. Divide Array Into Increasing SequencesVideoPremium

Solution65.4%Hard

Array, Counting· 1 company

1198. Find Smallest Common Element in All RowsVideoPremium

Solution76.5%Medium

Array, Binary Search +3· 2 companies

1213. Intersection of Three Sorted ArraysVideoPremium

Solution80.2%Easy

Array, Binary Search +2· 2 companies

1612. Check If Two Expression Trees are EquivalentVideoPremium

Solution71.8%Medium

Binary Tree, Counting +3· 1 company

1940. Longest Common Subsequence Between Sorted ArraysVideoPremium

Solution81.3%Medium

Array, Counting +1· 1 company

2067. Number of Equal Count SubstringsVideoPremium

Solution45.1%Medium

Counting, Prefix Sum +1· 1 company

2083. Substrings That Begin and End With the Same LetterVideoPremium

Solution74.1%Medium

Counting, Hash Table +3

2168. Unique Substrings With Equal Digit FrequencyVideoPremium

Solution64.6%Medium

Counting, Hash Function +3· 1 company

2268. Minimum Number of KeypressesVideoPremium

Solution71.2%Medium

Counting, Greedy +3· 1 company

2539. Count the Number of Good SubsequencesVideoPremium

Solution47.7%Medium

Combinatorics, Counting +3· 4 companies

2950. Number of Divisible SubstringsVideoPremium

Solution74.6%Medium

Counting, Hash Table +2· 4 companies

2955. Number of Same-End SubstringsVideoPremium

Solution60.6%Medium

Array, Counting +3· 2 companies

3063. Linked List FrequencyVideoPremium

Solution85.8%Easy

Counting, Hash Table +1

3167. Better Compression of StringVideoPremium

Solution75.3%Medium

Counting, Hash Table +2· 2 companies

3279. Maximum Total Area Occupied by PistonsVideoPremium

Solution41.3%Hard

Array, Counting +4

3581. Count Odd Letters from NumberVideoPremium

Solution85.1%Easy

Counting, Hash Table +2

Showing 1–17 of 17