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Problems

2,093 problems

Has videoPremium onlyReset
Array1,196Hash Table465String434Greedy327Math327Dynamic Programming324Sorting300Depth-First Search208Binary Search187Breadth-First Search165Matrix163Tree157Prefix Sum153Two Pointers148Database135All topics

Medium · With video · 2,093 results

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TitleSolutionAcceptDifficultyTopics
1364. Number of Trusted Contacts of a CustomerVideoPremium
Solution74.9%Medium
Database· 1 company
1366. Rank Teams by VotesVideo
Solution60.1%Medium
Array, Counting +3· 7 companies
1367. Linked List in Binary TreeVideo
Solution52.1%Medium
Binary Tree, Depth-First Search +2· 5 companies
1371. Find the Longest Substring Containing Vowels in Even CountsVideo
Solution75.7%Medium
Bit Manipulation, Hash Table +2· 6 companies
1372. Longest ZigZag Path in a Binary TreeVideo
Solution67.0%Medium
Binary Tree, Depth-First Search +2· 2 companies
1375. Number of Times Binary String Is Prefix-AlignedVideo
Solution66.3%Medium
Array· 1 company
1376. Time Needed to Inform All EmployeesVideo
Solution60.6%Medium
Breadth-First Search, Depth-First Search +1· 5 companies
1381. Design a Stack With Increment OperationVideo
Solution79.9%Medium
Array, Design +1· 6 companies
1382. Balance a Binary Search TreeVideo
Solution86.3%Medium
Binary Search Tree, Binary Tree +4· 5 companies
1386. Cinema Seat AllocationVideo
Solution56.8%Medium
Array, Bit Manipulation +2· 5 companies
1387. Sort Integers by The Power ValueVideo
Solution71.6%Medium
Dynamic Programming, Memoization +1· 2 companies
1390. Four DivisorsVideo
Solution56.6%Medium
Array, Math· 6 companies
1391. Check if There is a Valid Path in a GridVideo
Solution64.5%Medium
Array, Breadth-First Search +3· 3 companies
1393. Capital Gain/LossVideo
Solution84.7%Medium
Database· 2 companies
1395. Count Number of TeamsVideo
Solution70.1%Medium
Array, Binary Indexed Tree +2· 4 companies
1396. Design Underground SystemVideo
Solution74.8%Medium
Design, Hash Table +1· 7 companies
1398. Customers Who Bought Products A and B but Not CVideoPremium
Solution71.2%Medium
Database· 1 company
1400. Construct K Palindrome StringsVideo
Solution68.6%Medium
Counting, Greedy +2· 6 companies
1401. Circle and Rectangle OverlappingVideo
Solution67.4%Medium
Geometry, Math· 2 companies
1404. Number of Steps to Reduce a Number in Binary Representation to OneVideo
Solution63.8%Medium
Bit Manipulation, String· 7 companies
1405. Longest Happy StringVideo
Solution65.5%Medium
Greedy, Heap (Priority Queue) +1· 8 companies
1409. Queries on a Permutation With KeyVideo
Solution84.9%Medium
Array, Binary Indexed Tree +1· 1 company
1410. HTML Entity ParserVideo
Solution50.0%Medium
Hash Table, String· 3 companies
1414. Find the Minimum Number of Fibonacci Numbers Whose Sum Is KVideo
Solution64.9%Medium
Greedy, Math· 1 company
1415. The k-th Lexicographical String of All Happy Strings of Length nVideo
Solution87.1%Medium
Backtracking, String· 5 companies
1418. Display Table of Food Orders in a RestaurantVideo
Solution76.5%Medium
Array, Hash Table +3· 2 companies
1419. Minimum Number of Frogs CroakingVideo
Solution51.2%Medium
Counting, String· 2 companies
1423. Maximum Points You Can Obtain from CardsVideo
Solution58.1%Medium
Array, Prefix Sum +1· 11 companies
1424. Diagonal Traverse IIVideo
Solution58.3%Medium
Array, Heap (Priority Queue) +1· 5 companies
1428. Leftmost Column with at Least a OneVideoPremium
Solution55.3%Medium
Array, Binary Search +2· 3 companies
1429. First Unique NumberVideoPremium
Solution57.8%Medium
Array, Data Stream +3· 5 companies
1430. Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary TreeVideoPremium
Solution47.6%Medium
Binary Tree, Breadth-First Search +2
1432. Max Difference You Can Get From Changing an IntegerVideo
Solution48.8%Medium
Greedy, Math· 6 companies
1433. Check If a String Can Break Another StringVideo
Solution70.9%Medium
Greedy, Sorting +1
1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to LimitVideo
Solution58.1%Medium
Array, Heap (Priority Queue) +4· 15 companies
1440. Evaluate Boolean ExpressionVideoPremium
Solution71.6%Medium
Database· 1 company
1441. Build an Array With Stack OperationsVideo
Solution81.0%Medium
Array, Simulation +1· 4 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
1445. Apples & OrangesVideoPremium
Solution86.0%Medium
Database· 1 company
1447. Simplified FractionsVideo
Solution70.3%Medium
Math, Number Theory +1· 1 company
1448. Count Good Nodes in Binary TreeVideo
Solution73.8%Medium
Binary Tree, Breadth-First Search +2· 7 companies
1451. Rearrange Words in a SentenceVideo
Solution67.5%Medium
Sorting, String· 2 companies
1452. People Whose List of Favorite Companies Is Not a Subset of Another ListVideo
Solution60.6%Medium
Array, Hash Table +1· 2 companies
1454. Active UsersVideoPremium
Solution36.7%Medium
Database· 1 company
1456. Maximum Number of Vowels in a Substring of Given LengthVideo
Solution63.0%Medium
Sliding Window, String· 6 companies
1457. Pseudo-Palindromic Paths in a Binary TreeVideo
Solution68.3%Medium
Binary Tree, Bit Manipulation +3· 2 companies
1459. Rectangles AreaVideoPremium
Solution68.5%Medium
Database· 1 company
1461. Check If a String Contains All Binary Codes of Size KVideo
Solution61.5%Medium
Bit Manipulation, Hash Function +3· 5 companies
1462. Course Schedule IVVideo
Solution60.4%Medium
Breadth-First Search, Depth-First Search +2· 6 companies
Showing 751–800 of 2,093