All Problems

4301 problems total

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TitleDifficultyVideosCompanies
Implement Quack Data Structure with Three Stackshard-
Water and Jugmedium-
Find Leaves of Binary Treemedium-
Merge Two Sorted Iteratorsmedium-
Valid Perfect Squareeasy-
Key-Value Store with Max Key Queryhard-
Plus One 2 - Given number as Linked List plus onemedium-
Calculate Courier Active Time from Event Logseasy-
Range Additionmedium-
Solve System of Linear Addition Equationshard-
Sum of Two Integersmedium
Count Digits Without Loopseasy-
Super Powmedium-
Find K Pairs with Smallest Sumsmedium-
Guess Number Higher or Lowereasy-
Guess Number Higher or Lower IImedium-
Find Closest Coin by Manhattan Distanceeasy-
Wiggle Subsequencemedium-
Combination Sum 4 - All permutationsmedium-
Kth Smallest Element in a Sorted Matrixmedium-
Design Phone Directorymedium-
Insert Delete Search and GetRandom in Constant Time 1 - Dupes not allowedmedium-
Convert Hex String to Base64easy-
Insert Delete Search and GetRandom in Constant Time 2 - Duplicates allowedhard-
Decode Base64 String to Hexeasy-
Linked List Random Nodemedium-
Ransom Noteeasy-
Shuffle an Arraymedium-
Decrypt XOR-Encoded Hexadecimal Stringmedium-
Mini Parsermedium-
Lexicographical Numbersmedium
Explaining API vs SDK to Non-Technical Personmedium-
First Unique Character in a Stringeasy-
Explaining Web Cookies to Non-Technical Personmedium-
Longest Absolute File Pathmedium-
Find the Differenceeasy-
Elimination Gamemedium-
Find Missing 1000 Numbers in Large Rangemedium-
Perfect Rectanglehard-
Is Subsequenceeasy
Find Largest Consecutive Integer Range in Arraymedium-
UTF-8 Validationmedium-
Decode Stringmedium-
Longest Substring with At Least K Repeating Charactersmedium-
Rotate Functionmedium-
Find Largest Subset of Compatible Jobs (Interval Scheduling)medium-
Integer Replacementmedium-
Random Pick Indexmedium-
Evaluate Divisionmedium-
Nth Digitmedium-
Showing 1301 to 1350 of 4301 results