Companies

4.Shortest Distance from All Buildings

also at 23 more

3

3.Trapping Rainwater

Medium48 co.

Medium

Stack & Queues

also at 47 more

4

Hard6 co.

Hard

6.Minimum Swaps to Group All 1's Together II

also at 5 more

5

5.Delete a node in BST

Medium10 co.

Medium

Binary Search Trees

also at 9 more

6

Medium3 co.

Medium

Arrays

also at 2 more

7

7.Regular Expression Matching

Hard18 co.

Hard

also at 17 more

8

8.Accounts merge

Medium9 co.

Medium

9.Zig Zag or Spiral Traversal

also at 8 more

9

Medium11 co.

Medium

11.Add two numbers in Linked List

also at 10 more

10

10.Kadane's Algorithm

Medium45 co.

Medium

Arrays

also at 44 more

11

Medium38 co.

Medium

also at 37 more

12

12.Find peak element

Medium28 co.

Medium

Binary Search

also at 27 more

13

13.Clone Graph

Medium10 co.

Medium

also at 9 more

14

14.Number of islands

Medium48 co.

Medium

15.Top K Frequent Elements

also at 47 more

15

Medium33 co.

Medium

Hashing Heaps

also at 32 more

16

16.Shortest Bridge

Medium7 co.

Medium

17.Minimum Area Rectangle

also at 6 more

17

Medium3 co.

Medium

Hashing

also at 2 more

18

18.Maximum Width of BT

Medium12 co.

Medium

19.Single element in sorted array

also at 11 more

19

Medium23 co.

Medium

Binary Search

also at 22 more

20

20.Restore IP Addresses

Medium7 co.

Medium

Recursion & Backtracking

also at 6 more

21

21.Merge Intervals

Medium51 co.

Medium

Greedy Algorithms

also at 50 more

22

22.Remove Zero Sum Consecutive Nodes from Linked List

Medium2 co.

Medium

23.Power Set Bit Manipulation

also at 1 more

23

Medium19 co.

Medium

Bit Manipulation

also at 18 more

24

24.Word ladder I

Medium27 co.

Medium

Hashing Graphs

also at 26 more

25

25.Combination Sum II

Medium13 co.

Medium

Recursion & Backtracking

also at 12 more

26

26.Combination Sum

Medium25 co.

Medium

Recursion & Backtracking

also at 24 more

27

27.Count subarrays with given sum

Medium36 co.

Medium

Arrays Hashing

also at 35 more

28

28.Rotten Oranges

Medium39 co.

Medium

Arrays Graphs

also at 38 more

29

29.Longest Increasing Subsequence

Medium28 co.

Medium

Binary Search Dynamic Programming

also at 27 more

30

30.Right/Left View of BT

Medium13 co.

Medium

31.Valid Paranthesis Checker

also at 12 more

31

Medium50 co.

Medium

Greedy Algorithms

also at 49 more

32

32.Sort LL

Medium8 co.

Medium

also at 7 more

33

33.Maximal Square

Medium12 co.

Medium

34.Remove Duplicate Letters

also at 11 more

34

Medium8 co.

Medium

Stack & Queues

also at 7 more

35

35.Merge K sorted Lists

Medium33 co.

Medium

Linked List Heaps

also at 32 more

36

36.Find the starting point in LL

Medium12 co.

Medium

also at 11 more

37

37.Course Schedule I

Medium27 co.

Medium

38.Find the Length of the Longest Common Prefix

also at 26 more

38

Medium10 co.

Medium

Tries

also at 9 more

39

39.Jump Game - I

Medium29 co.

Medium

Greedy Algorithms

also at 28 more

40

40.Number of Good Leaf Nodes Pairs

Medium2 co.

Medium

41.Search in rotated sorted array-I

also at 1 more

41

Medium34 co.

Medium

Binary Search

also at 33 more

42

42.Product of the Last K Numbers

Medium2 co.

Medium

Design

also at 1 more

43

43.3Sum Closest

Medium8 co.

Medium

Arrays

also at 7 more

44

44.Longest Palindromic Substring

Medium40 co.

Medium

Strings Dynamic Programming

also at 39 more

45

45.Sliding Window Maximum

Medium36 co.

Medium

Stack & Queues

also at 35 more

46

46.House robber

Medium33 co.

Medium

47.Reverse Linked List II

also at 32 more

47

Medium9 co.

Medium

49.Trapping Rain Water II

also at 8 more

48

48.Two Sum

Easy58 co.

Easy

Arrays Hashing

also at 57 more

49

Hard6 co.

Hard