Companies

also at 21 more

2

2.3Sum Closest

Medium8 co.

Medium

also at 7 more

3

3.Fibonacci Number

Easy12 co.

Easy

4.Find the Lexicographically Smallest Valid Sequence

also at 11 more

4

Medium3 co.

Medium

5.Find square root of a number

also at 2 more

5

Medium16 co.

Medium

6.Maximum Product Subarray in an Array

also at 15 more

6

Medium25 co.

Medium

also at 24 more

7

7.Triangle

Medium9 co.

Medium

8.Count of Subarrays with Sum Divisible by K

also at 8 more

8

Medium11 co.

Medium

Hashing

also at 10 more

9

9.Subsets II

Medium8 co.

Medium

Recursion & Backtracking

also at 7 more

10

10.Sum Root to Leaf Numbers

Medium4 co.

Medium

11.Regular Expression Matching

also at 3 more

11

Hard18 co.

Hard

12.Longest Valid Parentheses

also at 17 more

12

Hard16 co.

Hard

also at 15 more

13

13.Koko eating bananas

Medium33 co.

Medium

also at 32 more

14

14.Remove K Digits

Medium22 co.

Medium

15.Maximum Length Substring With Two Occurrences

also at 21 more

15

Easy5 co.

Easy

also at 4 more

16

16.Reverse Pairs

Hard9 co.

Hard

also at 8 more

17

17.Path Sum II

Medium5 co.

Medium

18.Check if two trees are identical or not

also at 4 more

18

Medium7 co.

Medium

20.Smallest Palindromic Rearrangement II

also at 6 more

19

19.Palindrome Number

Easy21 co.

Easy

Mathematics

also at 20 more

20

Hard2 co.

Hard

Hashing

also at 1 more

21

21.Intersection of Two Arrays

Easy11 co.

Easy

22.Angle Between Hands of a Clock

also at 10 more

22

Medium5 co.

Medium

Mathematics

also at 4 more

23

23.Pow(x,n)

Medium19 co.

Medium

Mathematics

also at 18 more

24

24.Two sum in BST

Medium10 co.

Medium

Binary Search Trees

also at 9 more

25

25.Vertical Order Traversal

Medium12 co.

Medium

also at 11 more

26

26.Basic Calculator

Hard13 co.

Hard

27.Maximum Number of Vowels in a Substring of Given Length

also at 12 more

27

Medium1 co.

Medium

28.Valid Paranthesis Checker

also at 0 more

28

Medium50 co.

Medium

Greedy Algorithms

also at 49 more

29

29.Invert Binary Tree

Easy4 co.

Easy

30.Longest common subsequence

also at 3 more

30

Medium22 co.

Medium

31.Sliding Window Maximum

also at 21 more

31

Medium36 co.

Medium

32.Remove duplicates from sorted array

also at 35 more

32

Easy22 co.

Easy

also at 21 more

33

33.Search in a 2D Matrix

Medium18 co.

Medium

34.Trie Implementation and Advanced Operations

also at 17 more

34

Medium20 co.

Medium

Tries

also at 19 more

35

35.Evaluate Reverse Polish Notation

Medium9 co.

Medium

also at 8 more

36

36.Reverse a String II

Easy8 co.

Easy

37.Maximum Product of Two Digits

also at 7 more

37

Easy3 co.

Easy

Sorting

also at 2 more

38

38.Kids With the Greatest Number of Candies

Easy3 co.

Easy

40.Longest Palindromic Substring

also at 2 more

39

39.Sort an Array

Medium6 co.

Medium

Heaps

also at 5 more

40

Medium40 co.

Medium

Strings Dynamic Programming

also at 39 more

41

41.Predict the Winner

Medium7 co.

Medium

also at 6 more

42

42.Permutation in String

Medium10 co.

Medium

43.Minimum String Length After Removing Substrings

also at 9 more

43

Easy2 co.

Easy

44.Remove Linked List Elements

also at 1 more

44

Easy2 co.

Easy

Linked List

also at 1 more

45

45.Valid Number

Hard2 co.

Hard

46.Group Words by Anagrams

also at 1 more

46

Medium35 co.

Medium

48.Minimum Size Subarray Sum

also at 34 more

47

47.Merge Intervals

Medium51 co.

Medium

Greedy Algorithms

also at 50 more

48

Medium12 co.

Medium

49.Search in 2D matrix - II

also at 11 more

49

Medium17 co.

Medium

also at 16 more

50

50.Daily Temperatures

Medium21 co.

Medium