Companies

2.Maximum Frequency Stack

also at 0 more

2

Hard5 co.

Hard

4.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts

also at 4 more

3

3.Roman to Integer

Easy23 co.

Easy

Hashing

also at 22 more

4

Medium1 co.

Medium

5.Number of Visible People in a Queue

also at 0 more

5

Hard8 co.

Hard

6.Minimum Swaps to Group All 1's Together

also at 7 more

6

Medium3 co.

Medium

7.Flip String to Monotone Increasing

also at 2 more

7

Medium2 co.

Medium

8.The Earliest Moment When Everyone Become Friends

also at 1 more

8

Medium2 co.

Medium

Graphs

also at 1 more

9

9.Cheapest flight within K stops

Medium15 co.

Medium

Graphs

also at 14 more

10

10.Verify Preorder Sequence in Binary Search Tree

Medium2 co.

Medium

Binary Search Trees

also at 1 more

11

11.Container With Most Water

Medium33 co.

Medium

also at 32 more

12

12.Count and Say

Medium7 co.

Medium

13.Valid Paranthesis Checker

also at 6 more

13

Medium50 co.

Medium

14.Rearrange Words in a Sentence

also at 49 more

14

Medium1 co.

Medium

15.Maximum Number of Events That Can Be Attended

also at 0 more

15

Medium9 co.

Medium

Heaps

also at 8 more

16

16.Best time to buy and sell stock

Medium45 co.

Medium

also at 44 more

17

17.Fruit Into Baskets

Medium8 co.

Medium

20.String to Integer (atoi)

also at 7 more

18

18.Palindrome Pairs

Hard3 co.

Hard

Tries

also at 2 more

19

19.Degree of an Array

Easy2 co.

Easy

Hashing

also at 1 more

20

Medium15 co.

Medium

21.Check if a Parentheses String Can Be Valid

also at 14 more

21

Medium3 co.

Medium

also at 2 more

22

22.Reformat Date

Easy2 co.

Easy

23.KMP Algorithm or LPS array

also at 1 more

23

Medium16 co.

Medium

also at 15 more

24

24.Merge Intervals

Medium51 co.

Medium

27.Maximum Points You Can Obtain from Cards

also at 50 more

25

25.Two Sum

Easy58 co.

Easy

Arrays Hashing

also at 57 more

26

26.Word ladder I

Medium27 co.

Medium

Hashing Graphs

also at 26 more

27

Medium19 co.

Medium

28.Divide Players Into Teams of Equal Skill

also at 18 more

28

Medium2 co.

Medium

also at 1 more

29

29.String Compression

Medium21 co.

Medium

30.K-diff Pairs in an Array

also at 20 more

30

Medium2 co.

Medium

also at 1 more

31

31.LRU Cache

Medium52 co.

Medium

Hashing Linked List

also at 51 more

32

32.Valid Triangle Number

Medium2 co.

Medium

33.Minimum Number of Swaps to Make the String Balanced

also at 1 more

33

Medium6 co.

Medium

34.Max Consecutive Ones III

also at 5 more

34

Medium20 co.

Medium

35.Remove Duplicate Letters

also at 19 more

35

Medium8 co.

Medium

36.Sliding Window Maximum

also at 7 more

36

Medium36 co.

Medium

37.Find the smallest divisor

also at 35 more

37

Medium9 co.

Medium

also at 8 more

38

38.Basic Calculator II

Medium14 co.

Medium

39.Subarray Product Less Than K

also at 13 more

39

Medium10 co.

Medium

41.Remove Stones to Minimize the Total

also at 9 more

40

40.Rotten Oranges

Medium39 co.

Medium

Arrays Graphs

also at 38 more

41

Medium2 co.

Medium

Heaps

also at 1 more

42

42.Number of Good Binary Strings

Medium1 co.

Medium

also at 0 more

43

43.House robber

Medium33 co.

Medium

46.Minimum One Bit Operations to Make Integers Zero

also at 32 more

44

44.Reorganize String

Medium14 co.

Medium

Heaps

also at 13 more

45

45.Generate Parentheses

Medium32 co.

Medium

Recursion & Backtracking

also at 31 more

46

Hard3 co.

Hard

47.Letter Combinations of a Phone Number

also at 2 more

47

Medium34 co.

Medium

Recursion & Backtracking

also at 33 more

48

48.Kth Smallest and Largest element in BST

Medium13 co.

Medium

Binary Search Trees

also at 12 more

49

49.Minimum Replacements to Sort the Array

Hard1 co.

Hard

50.Search in rotated sorted array-I

also at 0 more

50

Medium34 co.

Medium