Companies

2.Binary Searchable Numbers in an Unsorted Array

also at 0 more

2

Medium7 co.

Medium

3.Replace Non-Coprime Numbers in Array

also at 6 more

3

Hard1 co.

Hard

also at 0 more

4

4.Design Twitter

Medium8 co.

Medium

Heaps

also at 7 more

5

5.Palindrome Permutation

Easy1 co.

Easy

Bit Manipulation

also at 0 more

6

6.Decode Ways

Medium13 co.

Medium

also at 12 more

7

7.Course Schedule I

Medium27 co.

Medium

also at 26 more

8

8.Dungeon Game

Hard6 co.

Hard

also at 5 more

9

9.Number of islands

Medium48 co.

Medium

10.Shortest Distance in a Binary Maze

also at 47 more

10

Medium9 co.

Medium

11.Maximum Manhattan Distance After K Changes

also at 8 more

11

Medium1 co.

Medium

Hashing

also at 0 more

12

12.Open the Lock

Medium8 co.

Medium

15.Rotate matrix by 90 degrees

also at 7 more

13

13.Minimum Knight Moves

Medium8 co.

Medium

Graphs Mathematics

also at 7 more

14

14.Alien Dictionary

Medium14 co.

Medium

Arrays Strings+1

also at 13 more

15

Medium25 co.

Medium

Arrays

also at 24 more

16

16.Valid Paranthesis Checker

Medium50 co.

Medium

Greedy Algorithms

also at 49 more

17

17.Find the Celebrity

Medium6 co.

Medium

18.Number of Ways to Form a Target String Given a Dictionary

also at 5 more

18

Hard4 co.

Hard

19.Frequency of the Most Frequent Element

also at 3 more

19

Medium7 co.

Medium

20.Minimum Window Substring

also at 6 more

20

Medium30 co.

Medium

21.Leftmost Column with at Least a One

also at 29 more

21

Medium2 co.

Medium

22.Capacity To Ship Packages Within D Days

also at 1 more

22

Medium10 co.

Medium

also at 9 more

23

23.One Edit Distance

Medium7 co.

Medium

24.Split Message Based on Limit

also at 6 more

24

Hard3 co.

Hard

25.Maximum Increasing Triplet Value

also at 2 more

25

Medium1 co.

Medium

Ordered Sets & Maps

also at 0 more

26

26.Longest Subsequence With Limited Sum

Easy1 co.

Easy

27.Best time to buy and sell stock

also at 0 more

27

Medium45 co.

Medium

also at 44 more

28

28.Goat Latin

Easy1 co.

Easy

29.Number of People That Can Be Seen in a Grid

also at 0 more

29

Medium1 co.

Medium

also at 0 more

30

30.Text Justification

Hard12 co.

Hard

also at 11 more

31

31.Fixed Point

Easy1 co.

Easy

32.Exclusive Time of Functions

also at 0 more

32

Medium4 co.

Medium

also at 3 more

33

33.Bomb Enemy

Medium6 co.

Medium

34.Maximum Frequency Stack

also at 5 more

34

Hard5 co.

Hard

35.Design Memory Allocator

also at 4 more

35

Medium10 co.

Medium

Design

also at 9 more

36

36.Regular Expression Matching

Hard18 co.

Hard

38.Excel Sheet Column Number

also at 17 more

37

37.Construct Quad Tree

Medium2 co.

Medium

General & N-ary Trees

also at 1 more

38

Easy3 co.

Easy

39.Find Median from Data Stream

also at 2 more

39

Medium30 co.

Medium

Heaps

also at 29 more

40

40.Time Based Key-Value Store

Medium15 co.

Medium

Design

also at 14 more

41

41.Most Profitable Path in a Tree

Medium3 co.

Medium

43.Minimum Fuel Cost to Report to the Capital

also at 2 more

42

42.Design a Text Editor

Hard1 co.

Hard

Linked List

also at 0 more

43

Medium1 co.

Medium

44.Populating Next Right Pointers in Each Node II

also at 0 more

44

Medium3 co.

Medium

Linked List

also at 2 more

45

45.Add Digits

Easy4 co.

Easy

Mathematics

also at 3 more

46

46.Divide Nodes Into the Maximum Number of Groups

Hard2 co.

Hard

Advanced Range Data Structures

also at 1 more

47

47.Permutations

Medium14 co.

Medium

Recursion & Backtracking

also at 13 more

48

48.The Skyline Problem

Hard5 co.

Hard

also at 4 more

49

49.Find Pattern in Infinite Stream II

Hard1 co.

Hard