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Problems

116 problems

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Array301Database212Hash Table116String116Depth-First Search78Math78Dynamic Programming76Sorting64Tree63Breadth-First Search53Greedy52Binary Search50Binary Tree48Two Pointers40Matrix39All topics

Premium · 116 results

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TitleSolutionAcceptDifficultyTopics
1485. Clone Binary Tree With Random PointerVideoPremium
Solution81.2%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1490. Clone N-ary TreeVideoPremium
Solution83.2%Medium
Breadth-First Search, Depth-First Search +2· 1 company
1500. Design a File Sharing SystemVideoPremium
Solution41.7%Medium
Data Stream, Design +3· 1 company
1506. Find Root of N-Ary TreeVideoPremium
Solution78.4%Medium
Bit Manipulation, Depth-First Search +2· 3 companies
1554. Strings Differ by One CharacterVideoPremium
Solution39.4%Medium
Hash Function, Hash Table +2· 1 company
1570. Dot Product of Two Sparse VectorsVideoPremium
Solution89.9%Medium
Array, Design +2· 12 companies
1612. Check If Two Expression Trees are EquivalentVideoPremium
Solution71.8%Medium
Binary Tree, Counting +3· 1 company
1650. Lowest Common Ancestor of a Binary Tree IIIVideoPremium
Solution83.0%Medium
Binary Tree, Hash Table +2· 10 companies
1660. Correct a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 1 company
1676. Lowest Common Ancestor of a Binary Tree IVVideoPremium
Solution79.6%Medium
Binary Tree, Depth-First Search +2· 4 companies
1740. Find Distance in a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1756. Design Most Recently Used QueueVideoPremium
Solution78.0%Medium
Array, Binary Indexed Tree +4· 2 companies
1772. Sort Features by PopularityVideoPremium
Solution66.4%Medium
Array, Hash Table +2· 1 company
1788. Maximize the Beauty of the GardenVideoPremium
Solution62.8%Hard
Array, Greedy +2· 1 company
1794. Count Pairs of Equal Substrings With Minimum DifferenceVideoPremium
Solution62.7%Medium
Greedy, Hash Table +1· 1 company
1804. Implement Trie II (Prefix Tree)VideoPremium
Solution63.6%Medium
Design, Hash Table +2· 2 companies
1836. Remove Duplicates From an Unsorted Linked ListVideoPremium
Solution75.6%Medium
Hash Table, Linked List· 2 companies
1852. Distinct Numbers in Each SubarrayVideoPremium
Solution77.3%Medium
Array, Hash Table +1· 1 company
1940. Longest Common Subsequence Between Sorted ArraysVideoPremium
Solution81.3%Medium
Array, Counting +1· 1 company
1983. Widest Pair of Indices With Equal Range SumVideoPremium
Solution54.0%Medium
Array, Hash Table +1· 1 company
2083. Substrings That Begin and End With the Same LetterVideoPremium
Solution74.1%Medium
Counting, Hash Table +3
2107. Number of Unique Flavors After Sharing K CandiesVideoPremium
Solution62.4%Medium
Array, Hash Table +1· 2 companies
2152. Minimum Number of Lines to Cover PointsVideoPremium
Solution42.9%Medium
Array, Backtracking +6· 1 company
2168. Unique Substrings With Equal Digit FrequencyVideoPremium
Solution64.6%Medium
Counting, Hash Function +3· 1 company
2229. Check if an Array Is ConsecutiveVideoPremium
Solution61.6%Easy
Array, Hash Table +1
2254. Design Video Sharing PlatformVideoPremium
–64.1%Hard
Design, Hash Table +2· 1 company
2268. Minimum Number of KeypressesVideoPremium
Solution71.2%Medium
Counting, Greedy +3· 1 company
2408. Design SQLVideoPremium
Solution63.9%Medium
Array, Design +2· 2 companies
2489. Number of Substrings With Fixed RatioVideoPremium
Solution56.0%Medium
Hash Table, Math +2· 1 company
2524. Maximum Frequency Score of a SubarrayVideoPremium
Solution35.7%Hard
Array, Hash Table +3· 1 company
2539. Count the Number of Good SubsequencesVideoPremium
Solution47.7%Medium
Combinatorics, Counting +3· 4 companies
2590. Design a Todo ListVideoPremium
Solution59.8%Medium
Array, Design +3· 1 company
2743. Count Substrings Without Repeating CharacterVideoPremium
Solution75.9%Medium
Hash Table, Sliding Window +1· 1 company
2852. Sum of Remoteness of All CellsVideoPremium
Solution70.8%Medium
Array, Breadth-First Search +4· 1 company
2898. Maximum Linear Stock ScoreVideoPremium
Solution62.3%Medium
Array, Hash Table· 1 company
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
2964. Number of Divisible Triplet SumsVideoPremium
Solution67.5%Medium
Array, Hash Table· 9 companies
3032. Count Numbers With Unique Digits IIVideoPremium
Solution87.4%Easy
Dynamic Programming, Hash Table +1· 1 company
3063. Linked List FrequencyVideoPremium
Solution85.8%Easy
Counting, Hash Table +1
3078. Match Alphanumerical Pattern in Matrix IVideoPremium
Solution64.6%Medium
Array, Hash Table +2· 2 companies
3104. Find Longest Self-Contained SubstringVideoPremium
Solution58.6%Hard
Binary Search, Hash Table +2· 1 company
3167. Better Compression of StringVideoPremium
Solution75.3%Medium
Counting, Hash Table +2· 2 companies
3237. Alt and Tab SimulationVideoPremium
Solution54.3%Medium
Array, Hash Table +1
3279. Maximum Total Area Occupied by PistonsVideoPremium
Solution41.3%Hard
Array, Counting +4
3299. Sum of Consecutive SubsequencesVideoPremium
Solution44.1%Hard
Array, Dynamic Programming +1
3329. Count Substrings With K-Frequency Characters IIVideoPremium
Solution72.2%Hard
Hash Table, Sliding Window +1
3369. Design an Array Statistics Tracker VideoPremium
Solution35.7%Hard
Binary Search, Hash Table +1· 1 company
3391. Design a 3D Binary Matrix with Efficient Layer TrackingVideoPremium
Solution66.1%Medium
Array, Design +4· 1 company
3416. Subsequences with a Unique Middle Mode IIPremium
–16.3%Hard
Array, Combinatorics +2
Showing 51–100 of 116