Companies

6.Top K Frequent Elements

also at 44 more

5

5.Trapping Rainwater

Medium48 co.

Medium

Stack & Queues

also at 47 more

6

Medium33 co.

Medium

Hashing Heaps

also at 32 more

7

7.Minimum Operations to Make a Uni-Value Grid

Medium1 co.

Medium

Matrix

also at 0 more

8

8.Valid Paranthesis Checker

Medium50 co.

Medium

Greedy Algorithms

also at 49 more

9

9.Group Words by Anagrams

Medium35 co.

Medium

also at 34 more

10

10.Multiply Strings

Medium9 co.

Medium

11.First Missing Positive

also at 8 more

11

Hard19 co.

Hard

Hashing

also at 18 more

12

12.Max Consecutive Ones III

Medium20 co.

Medium

13.K-th Largest element in an array

also at 19 more

13

Medium35 co.

Medium

Heaps

also at 34 more

14

14.3 Sum

Medium42 co.

Medium

15.Reverse Words in a String

also at 41 more

15

Medium14 co.

Medium

17.Best time to buy and sell stock

also at 13 more

16

16.Generate Parentheses

Medium32 co.

Medium

Recursion & Backtracking

also at 31 more

17

Medium45 co.

Medium

18.Merge two sorted arrays without extra space

also at 44 more

18

Medium33 co.

Medium

also at 32 more

19

19.Move Zeros to End

Easy31 co.

Easy

20.Merge two Sorted Lists

also at 30 more

20

Medium32 co.

Medium

Linked List Recursion & Backtracking

also at 31 more

21

21.LRU Cache

Medium52 co.

Medium

Hashing Linked List

also at 51 more

22

22.Median of 2 sorted arrays

Hard34 co.

Hard

Binary Search

also at 33 more

23

23.Maximum Difference Between Node and Ancestor

Medium1 co.

Medium

Binary Trees

also at 0 more

24

24.First Unique Character in a String

Easy14 co.

Easy

Stack & Queues

also at 13 more

25

25.Longest Increasing Path in a Matrix

Hard7 co.

Hard

Graphs

also at 6 more

26

26.Sort Characters by Frequency

Medium15 co.

Medium

Strings Hashing+1

also at 14 more

27

27.Longest Substring Without Repeating Characters

Medium51 co.

Medium

also at 50 more

28

28.Grid unique paths

Medium16 co.

Medium

30.Query Kth Smallest Trimmed Number

also at 15 more

29

29.Palindrome Number

Easy21 co.

Easy

Mathematics

also at 20 more

30

Medium2 co.

Medium

Heaps

also at 1 more

31

31.Longest Consecutive Sequence in an Array

Medium37 co.

Medium

Arrays Hashing

also at 36 more

32

32.Decode Ways

Medium13 co.

Medium

35.Left Rotate Array by K Places

also at 12 more

33

33.Reverse Integer

Medium15 co.

Medium

Mathematics

also at 14 more

34

34.Pow(x,n)

Medium19 co.

Medium

Mathematics

also at 18 more

35

Easy25 co.

Easy

37.Longest Palindromic Substring

also at 24 more

36

36.Merge Intervals

Medium51 co.

Medium

Greedy Algorithms

also at 50 more

37

Medium40 co.

Medium

Strings Dynamic Programming

also at 39 more

38

38.Reverse Vowels of a String

Easy10 co.

Easy

also at 9 more

39

39.Reverse a LL

Medium30 co.

Medium

Linked List

also at 29 more

40

40.Two Sum

Easy58 co.

Easy

Arrays Hashing

also at 57 more

41

41.House robber

Medium33 co.

Medium

42.Add two numbers in Linked List

also at 32 more

42

Medium38 co.

Medium

Linked List

also at 37 more

43

43.Partition Equal Subset Sum

Medium10 co.

Medium

also at 9 more

44

44.String Compression

Medium21 co.

Medium

also at 20 more

45

45.Valid Anagram

Easy25 co.

Easy

Strings Hashing

also at 24 more

46

46.Remove K Digits

Medium22 co.

Medium

Stack & Queues

also at 21 more

47

47.Reverse a String I

Easy16 co.

Easy

also at 15 more

48

48.Edit distance

Medium24 co.

Medium