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Problems

473 problems

Has videoPremium onlyReset
Array1,212Hash Table473String437Math331Greedy330Dynamic Programming327Sorting302Depth-First Search208Binary Search189Breadth-First Search166Matrix163Tree158Prefix Sum155Two Pointers150Database137All topics

Medium · 473 results

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TitleSolutionAcceptDifficultyTopics
1297. Maximum Number of Occurrences of a SubstringVideo
Solution54.9%Medium
Hash Table, Sliding Window +1· 7 companies
1311. Get Watched Videos by Your FriendsVideo
Solution54.2%Medium
Array, Breadth-First Search +3· 3 companies
1338. Reduce Array Size to The HalfVideo
Solution69.5%Medium
Array, Greedy +3· 1 company
1347. Minimum Number of Steps to Make Two Strings AnagramVideo
Solution82.6%Medium
Counting, Hash Table +1· 10 companies
1348. Tweet Counts Per FrequencyVideo
Solution46.6%Medium
Binary Search, Design +3· 4 companies
1357. Apply Discount Every n OrdersVideo
Solution66.1%Medium
Array, Design +1· 1 company
1358. Number of Substrings Containing All Three CharactersVideo
Solution74.4%Medium
Hash Table, Sliding Window +1· 6 companies
1366. Rank Teams by VotesVideo
Solution60.1%Medium
Array, Counting +3· 7 companies
1371. Find the Longest Substring Containing Vowels in Even CountsVideo
Solution75.7%Medium
Bit Manipulation, Hash Table +2· 6 companies
1386. Cinema Seat AllocationVideo
Solution56.8%Medium
Array, Bit Manipulation +2· 5 companies
1396. Design Underground SystemVideo
Solution74.8%Medium
Design, Hash Table +1· 7 companies
1400. Construct K Palindrome StringsVideo
Solution68.6%Medium
Counting, Greedy +2· 6 companies
1410. HTML Entity ParserVideo
Solution50.0%Medium
Hash Table, String· 3 companies
1418. Display Table of Food Orders in a RestaurantVideo
Solution76.5%Medium
Array, Hash Table +3· 2 companies
1429. First Unique NumberVideoPremium
Solution57.8%Medium
Array, Data Stream +3· 5 companies
1442. Count Triplets That Can Form Two Arrays of Equal XORVideo
Solution84.9%Medium
Array, Bit Manipulation +3· 2 companies
1443. Minimum Time to Collect All Apples in a TreeVideo
Solution63.6%Medium
Breadth-First Search, Depth-First Search +2· 4 companies
1452. People Whose List of Favorite Companies Is Not a Subset of Another ListVideo
Solution60.6%Medium
Array, Hash Table +1· 2 companies
1461. Check If a String Contains All Binary Codes of Size KVideo
Solution61.5%Medium
Bit Manipulation, Hash Function +3· 5 companies
1477. Find Two Non-overlapping Sub-arrays Each With Target SumVideo
Solution49.5%Medium
Array, Binary Search +3· 1 company
1481. Least Number of Unique Integers after K RemovalsVideo
Solution63.8%Medium
Array, Counting +3· 7 companies
1485. Clone Binary Tree With Random PointerVideoPremium
Solution81.2%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1487. Making File Names UniqueVideo
Solution38.5%Medium
Array, Hash Table +1· 1 company
1488. Avoid Flood in The CityVideo
Solution39.0%Medium
Array, Binary Search +3· 6 companies
1490. Clone N-ary TreeVideoPremium
Solution83.2%Medium
Breadth-First Search, Depth-First Search +2· 1 company
1497. Check If Array Pairs Are Divisible by kVideo
Solution46.2%Medium
Array, Counting +1· 8 companies
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
1519. Number of Nodes in the Sub-Tree With the Same LabelVideo
Solution55.5%Medium
Breadth-First Search, Counting +3· 2 companies
1525. Number of Good Ways to Split a StringVideo
Solution68.2%Medium
Bit Manipulation, Dynamic Programming +2· 2 companies
1540. Can Convert String in K MovesVideo
Solution37.6%Medium
Hash Table, String· 1 company
1546. Maximum Number of Non-Overlapping Subarrays With Sum Equals TargetVideo
Solution49.4%Medium
Array, Greedy +2· 1 company
1554. Strings Differ by One CharacterVideoPremium
Solution39.4%Medium
Hash Function, Hash Table +2· 1 company
1562. Find Latest Group of Size MVideo
Solution43.8%Medium
Array, Binary Search +2· 1 company
1570. Dot Product of Two Sparse VectorsVideoPremium
Solution89.9%Medium
Array, Design +2· 12 companies
1577. Number of Ways Where Square of Number Is Equal to Product of Two NumbersVideo
Solution43.9%Medium
Array, Hash Table +2
1590. Make Sum Divisible by PVideo
Solution42.6%Medium
Array, Hash Table +1· 7 companies
1593. Split a String Into the Max Number of Unique SubstringsVideo
Solution68.8%Medium
Backtracking, Hash Table +1· 5 companies
1600. Throne InheritanceVideo
Solution68.2%Medium
Depth-First Search, Design +2· 2 companies
1604. Alert Using Same Key-Card Three or More Times in a One Hour PeriodVideo
Solution46.0%Medium
Array, Hash Table +2· 5 companies
1612. Check If Two Expression Trees are EquivalentVideoPremium
Solution71.8%Medium
Binary Tree, Counting +3· 1 company
1630. Arithmetic SubarraysVideo
Solution83.7%Medium
Array, Hash Table +1· 1 company
1638. Count Substrings That Differ by One CharacterVideo
Solution72.4%Medium
Dynamic Programming, Enumeration +2· 1 company
1647. Minimum Deletions to Make Character Frequencies UniqueVideo
Solution61.3%Medium
Greedy, Hash Table +2· 7 companies
1650. Lowest Common Ancestor of a Binary Tree IIIVideoPremium
Solution83.0%Medium
Binary Tree, Hash Table +2· 10 companies
1657. Determine if Two Strings Are CloseVideo
Solution54.2%Medium
Counting, Hash Table +2· 7 companies
1658. Minimum Operations to Reduce X to ZeroVideo
Solution45.0%Medium
Array, Binary Search +3· 4 companies
1660. Correct a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 1 company
1674. Minimum Moves to Make Array ComplementaryVideo
Solution65.2%Medium
Array, Hash Table +1· 5 companies
1676. Lowest Common Ancestor of a Binary Tree IVVideoPremium
Solution79.6%Medium
Binary Tree, Depth-First Search +2· 4 companies
Showing 151–200 of 473