Companies

also at 29 more

2

2.Word Break

Medium20 co.

Medium

3.Largest rectangle in a histogram

also at 19 more

3

Hard30 co.

Hard

also at 29 more

4

4.Koko eating bananas

Medium33 co.

Medium

5.Largest Positive Integer That Exists With Its Negative

also at 32 more

5

Easy1 co.

Easy

6.Design In-Memory File System

also at 0 more

6

Hard10 co.

Hard

Tries

also at 9 more

7

7.3 Sum

Medium42 co.

Medium

also at 41 more

8

8.Distinct subsequences

Medium11 co.

Medium

9.Number of distinct islands

also at 10 more

9

Medium9 co.

Medium

Hashing Graphs

also at 8 more

10

10.LFU Cache

Hard28 co.

Hard

Hashing Linked List

also at 27 more

11

11.Power Set Bit Manipulation

Medium19 co.

Medium

Bit Manipulation

also at 18 more

12

12.Alien Dictionary

Medium14 co.

Medium

Arrays Strings+1

also at 13 more

13

13.Open the Lock

Medium8 co.

Medium

15.Split Strings by Separator

also at 7 more

14

14.Merge Intervals

Medium51 co.

Medium

Greedy Algorithms

also at 50 more

15

Easy1 co.

Easy

Strings

also at 0 more

16

16.Longest Substring With At Most K Distinct Characters

Medium15 co.

Medium

Strings Hashing

also at 14 more

17

17.Longest Duplicate Substring

Hard2 co.

Hard

Tries

also at 1 more

18

18.Single element in sorted array

Medium23 co.

Medium

also at 22 more

19

19.Course Schedule I

Medium27 co.

Medium

Advanced Range Data Structures

also at 26 more

20

20.Range Module

Hard1 co.

Hard

also at 0 more

21

21.Kadane's Algorithm

Medium45 co.

Medium

22.Sliding Window Maximum

also at 44 more

22

Medium36 co.

Medium

also at 35 more

23

23.Number of islands

Medium48 co.

Medium

24.Random Pick with Weight

also at 47 more

24

Medium8 co.

Medium

also at 7 more

25

25.Remove K Digits

Medium22 co.

Medium

also at 21 more

26

26.Shortest Bridge

Medium7 co.

Medium

27.K-th Largest element in an array

also at 6 more

27

Medium35 co.

Medium

28.Longest Substring Without Repeating Characters

also at 34 more

28

Medium51 co.

Medium

Strings

also at 50 more

29

29.Snapshot Array

Medium7 co.

Medium

Advanced Range Data Structures

also at 6 more

30

30.LRU Cache

Medium52 co.

Medium

Hashing Linked List

also at 51 more

31

31.Decode String

Medium18 co.

Medium

35.Maximum Number of Alloys

also at 17 more

32

32.Shopping Offers

Medium2 co.

Medium

Recursion & Backtracking

also at 1 more

33

33.Split BST

Medium1 co.

Medium

Binary Search Trees

also at 0 more

34

34.Design Hit Counter

Medium18 co.

Medium

Arrays Stack & Queues

also at 17 more

35

Medium2 co.

Medium

37.Regular Expression Matching

also at 1 more

36

36.Task Scheduler

Medium17 co.

Medium

Heaps Greedy Algorithms

also at 16 more

37

Hard18 co.

Hard

also at 17 more

38

38.Wildcard matching

Medium19 co.

Medium

also at 18 more

39

39.Basic Calculator III

Hard6 co.

Hard

40.Group Words by Anagrams

also at 5 more

40

Medium35 co.

Medium

41.Insert Delete GetRandom O(1)

also at 34 more

41

Medium20 co.

Medium

Design

also at 19 more

42

42.Find Pivot Index

Easy9 co.

Easy

also at 8 more

43

43.K Nearest Integers

Medium20 co.

Medium

44.Increasing Triplet Subsequence

also at 19 more

44

Medium5 co.

Medium

45.Longest Repeating Substring

also at 4 more

45

Medium1 co.

Medium

Tries

also at 0 more

46

46.Merge K sorted Lists

Medium33 co.

Medium

Linked List Heaps

also at 32 more

47

47.Palindrome partitioning

Medium17 co.

Medium

Recursion & Backtracking

also at 16 more

48

48.Maximum Good Subarray Sum

Medium2 co.

Medium

also at 1 more

49

49.Design Twitter

Medium8 co.

Medium