Companies

also at 17 more

2.Unique paths II

Medium12 co.

Medium

3.Kth largest element in a stream of running integers

also at 11 more

Medium11 co.

Medium

Binary Search Trees Heaps

also at 10 more

4.Edit distance

Medium24 co.

Medium

5.Shortest Path in a Hidden Grid

also at 23 more

Medium3 co.

Medium

6.Add two numbers in Linked List

also at 2 more

Medium38 co.

Medium

Linked List

also at 37 more

7.0 and 1 Knapsack

Medium6 co.

Medium

also at 5 more

8.Find the Celebrity

Medium6 co.

Medium

9.Articulation point in graph

also at 5 more

Hard7 co.

Hard

10.Correct BST with two nodes swapped

also at 6 more

Medium7 co.

Medium

Binary Search Trees

also at 6 more

11.Jump Game - I

Medium29 co.

Medium

Greedy Algorithms

also at 28 more

12.Find Median from Data Stream

Medium30 co.

Medium

Heaps

also at 29 more

13.Shortest Path to Get Food

Medium3 co.

Medium

14.Sort a Linked List of 0's 1's and 2's

also at 2 more

Medium10 co.

Medium

Linked List

also at 9 more

15.Construct a BT from Postorder and Inorder

Medium6 co.

Medium

Hashing Binary Trees

also at 5 more

16.Serialize and De-serialize BT

Hard21 co.

Hard

17.Split array - largest sum

also at 20 more

Medium23 co.

Medium

Binary Search Dynamic Programming

also at 22 more

18.Largest Divisible Subset

Medium10 co.

Medium

19.Construct a BT from Preorder and Inorder

also at 9 more

Medium13 co.

Medium

also at 12 more

20.Ninja's training

Medium2 co.

Medium

23.Maximum Product Subarray in an Array

also at 1 more

21.Rotten Oranges

Medium39 co.

Medium

Arrays Graphs

also at 38 more

22.Combination Sum II

Medium13 co.

Medium

Recursion & Backtracking

also at 12 more

Medium25 co.

Medium

Arrays

also at 24 more

24.Maximum path sum

Hard18 co.

Hard

27.Count Prefix Appearances

also at 17 more

25.Reverse a String I

Easy16 co.

Easy

Strings

also at 15 more

26.Bulb Switcher

Medium4 co.

Medium

Mathematics

also at 3 more

Medium11 co.

Medium

Strings Hashing

also at 10 more

28.Merge K Sorted Arrays

Medium4 co.

Medium

Heaps

also at 3 more

29.Two Sum

Easy58 co.

Easy

Arrays Hashing

also at 57 more

30.Remove Brackets from an Algebraic Expression

Medium9 co.

Medium

Strings Stack & Queues

also at 8 more

31.Number of islands

Medium48 co.

Medium

32.Find the repeating and missing number

also at 47 more

Medium8 co.

Medium

Sorting

also at 7 more

33.Diameter of Binary Tree

Medium22 co.

Medium

35.Add Two Polynomials Represented as Linked Lists

also at 21 more

34.Delete a node in BST

Medium10 co.

Medium

Binary Search Trees

also at 9 more

Medium3 co.

Medium

Linked List Mathematics

also at 2 more

36.Find All Symmetric Pairs

Easy4 co.

Easy

Hashing

also at 3 more

37.Find the Number of K-Even Arrays

Medium2 co.

Medium

also at 1 more

38.Boundary Traversal

Medium7 co.

Medium

39.Sort an array of 0's 1's and 2's

also at 6 more

Medium32 co.

Medium

Sorting

also at 31 more

40.Search in 2D matrix - II

Medium17 co.

Medium

Binary Search

also at 16 more

41.Connecting Cities With Minimum Cost

Medium2 co.

Medium

43.Longest Palindromic Substring

also at 1 more

42.Kadane's Algorithm

Medium45 co.

Medium

Arrays

also at 44 more

Medium40 co.

Medium

Strings Dynamic Programming

also at 39 more

44.Word Search

Medium27 co.

Medium

Recursion & Backtracking

also at 26 more

45.Minimum Time to Break Locks II

Medium4 co.

Medium

46.Merge two Sorted Lists

also at 3 more

Medium32 co.

Medium

Linked List Recursion & Backtracking

also at 31 more

47.Minimum Time Takes to Reach Destination Without Drowning

Medium6 co.

Medium

also at 5 more

48.Word Break

Medium20 co.

Medium