Companies

5.Most Profitable Path in a Tree

also at 29 more

5

Medium3 co.

Medium

6.Number of Distinct Substrings in a String

also at 2 more

6

Medium2 co.

Medium

Tries

also at 1 more

7

7.Number of operations to make network connected

Medium5 co.

Medium

also at 4 more

8

8.Climbing stairs

Medium24 co.

Medium

also at 23 more

9

9.Strange Printer

Hard1 co.

Hard

10.Painting a Grid With Three Different Colors

also at 0 more

10

Hard2 co.

Hard

also at 1 more

11

11.Max Area of Island

Medium10 co.

Medium

12.Next Greater Element - 2

also at 9 more

12

Medium21 co.

Medium

13.Number of Ways to Paint N × 3 Grid

also at 20 more

13

Hard2 co.

Hard

14.Longest Balanced Subarray I

also at 1 more

14

Medium1 co.

Medium

Advanced Range Data Structures

also at 0 more

15

15.Alien Dictionary

Medium14 co.

Medium

Arrays Strings+1

also at 13 more

16

16.Candy

Medium24 co.

Medium

17.Longest Increasing Subsequence

also at 23 more

17

Medium28 co.

Medium

Binary Search Dynamic Programming

also at 27 more

18

18.Unique Email Addresses

Easy3 co.

Easy

Hashing

also at 2 more

19

19.Destroy Sequential Targets

Medium1 co.

Medium

Hashing

also at 0 more

20

20.Word Break

Medium20 co.

Medium

also at 19 more

21

21.LCA in BT

Medium19 co.

Medium

Binary Trees

also at 18 more

22

22.Move Zeros to End

Easy31 co.

Easy

23.Top K Frequent Elements

also at 30 more

23

Medium33 co.

Medium

Hashing Heaps

also at 32 more

24

24.Valid Paranthesis Checker

Medium50 co.

Medium

also at 49 more

25

25.House robber

Medium33 co.

Medium

26.Minimum Deletions to Make Character Frequencies Unique

also at 32 more

26

Medium1 co.

Medium

27.Find Median from Data Stream

also at 0 more

27

Medium30 co.

Medium

Heaps

also at 29 more

28

28.Sudoku Solver

Hard16 co.

Hard

Recursion & Backtracking

also at 15 more

29

29.Palindromic Substrings

Medium8 co.

Medium

Advanced Range Data Structures

also at 7 more

30

30.Plus One

Easy11 co.

Easy

Mathematics

also at 10 more

31

31.My Calendar I

Medium5 co.

Medium

also at 4 more

32

32.Two Sum

Easy58 co.

Easy

Arrays Hashing

also at 57 more

33

33.Cheapest flight within K stops

Medium15 co.

Medium

34.Length of the Longest Subsequence That Sums to Target

also at 14 more

34

Medium1 co.

Medium

also at 0 more

35

35.Reverse Pairs

Hard9 co.

Hard

also at 8 more

36

36.Next Permutation

Medium32 co.

Medium

37.Maximum Difference Score in a Grid

also at 31 more

37

Medium1 co.

Medium

39.Optimal Account Balancing

also at 0 more

38

38.Logger Rate Limiter

Easy7 co.

Easy

Design

also at 6 more

39

Hard7 co.

Hard

Recursion & Backtracking

also at 6 more

40

40.Make String Anti-palindrome

Hard2 co.

Hard

41.Count Islands With Total Value Divisible by K

also at 1 more

41

Medium1 co.

Medium

also at 0 more

42

42.Zigzag Conversion

Medium10 co.

Medium

Strings

also at 9 more

43

43.Generate Parentheses

Medium32 co.

Medium

Recursion & Backtracking

also at 31 more

44

44.Validate IP Address

Medium4 co.

Medium

Strings

also at 3 more

45

45.Maximum Rectangles

Hard17 co.

Hard

also at 16 more

46

46.Basic Calculator IV

Hard2 co.

Hard

47.Russian Doll Envelopes

also at 1 more

47

Hard5 co.

Hard

also at 4 more

48

48.Number of islands

Medium48 co.

Medium

also at 47 more

49

49.Palindrome Check

Medium28 co.

Medium

Strings

also at 27 more

50

50.Basic Calculator III

Hard6 co.

Hard