Problems — Brutal DSA

ID	Title	Difficulty	Companies
1	Two Sum	Easy	accentureaccoliteadobeagoda
2	Add Two Numbers	Medium	accentureaccoliteadobeairbnb
3	Longest Substring Without Repeating Characters	Medium	accentureaccoliteadobeagoda
4	Median of Two Sorted Arrays	Hard	accentureadobeamazonapple
5	Longest Palindromic Substring	Medium	accentureaccoliteadobeamazon
6	Zigzag Conversion	Medium	amazonapplebloomberggoogle
7	Reverse Integer	Medium	accentureadobeamazonapple
8	String to Integer (atoi)	Medium	accentureadobeamazonapple
9	Palindrome Number	Easy	accentureamazonamdbcg
10	Regular Expression Matching	Hard	accentureairbnbamazonapple
11	Container With Most Water	Medium	accentureaccoliteadobeairtel
12	Integer to Roman	Medium	accentureadobeagodaamazon
13	Roman to Integer	Easy	accentureadobeamazonamd
14	Longest Common Prefix	Easy	accentureadobealtenamazon
15	3Sum	Medium	accentureadobeagodaamazon
16	3Sum Closest	Medium	amazonbloombergbytedancedream11
17	Letter Combinations of a Phone Number	Medium	accentureamazonapplebloomberg
18	4Sum	Medium	accentureamazonapplebloomberg
19	Remove Nth Node From End of List	Medium	accentureamazonapplebloomberg
20	Valid Parentheses	Easy	accentureadobeagodaairbnb
21	Merge Two Sorted Lists	Easy	accentureamazonapplearista-networks
22	Generate Parentheses	Medium	accentureadobeamazonapple
23	Merge k Sorted Lists	Hard	airbnbamazonandurilapple
24	Swap Nodes in Pairs	Medium	altimetrikamazonarista-networksbloomberg
25	Reverse Nodes in k-Group	Hard	adobeamazonapplearista-networks
26	Remove Duplicates from Sorted Array	Easy	accentureamazonapplebloomberg
27	Remove Element	Easy	adobeamazonapplebloomberg
28	Find the Index of the First Occurrence in a String	Easy	amazonapplebloombergcapgemini
29	Divide Two Integers	Medium	amazonbloomberggooglemeta
30	Substring with Concatenation of All Words	Hard	amazonapplebloomberggoogle
31	Next Permutation	Medium	accentureadobeairtelamazon
32	Longest Valid Parentheses	Hard	accentureamazonbloombergbookingcom
33	Search in Rotated Sorted Array	Medium	accentureadobeamazonanduril
34	Find First and Last Position of Element in Sorted Array	Medium	accentureairtelamazonapple
35	Search Insert Position	Easy	accentureamazonbloombergcognizant
36	Valid Sudoku	Medium	amazonappleautodeskbloomberg
37	Sudoku Solver	Hard	amazonapplebloombergcitadel
38	Count and Say	Medium	amazonbloombergexpediagoogle
39	Combination Sum	Medium	airbnbamazonapplebloomberg
40	Combination Sum II	Medium	adobeamazonbloombergbytedance
41	First Missing Positive	Hard	amazonapplebloombergcognizant
42	Trapping Rain Water	Hard	accentureadobeairbnbamazon
43	Multiply Strings	Medium	amazonbloombergbytedanceepam-systems
44	Wildcard Matching	Hard	amazonatlassianbloombergcoupang
45	Jump Game II	Medium	adobeamazonappleatlassian
46	Permutations	Medium	agodaamazonamerican-expressapple
47	Permutations II	Medium	amazonapplebloomberggoldman-sachs
48	Rotate Image	Medium	accentureadobeamazonanduril
49	Group Anagrams	Medium	accoliteadobeaffirmamazon
50	"Pow(x, n)"	n)"	accentureadobeamazonbloomberg

1

Two Sum

Easy

accentureaccoliteadobeagoda

2

Add Two Numbers

Medium

accentureaccoliteadobeairbnb

3

Longest Substring Without Repeating Characters

Medium

accentureaccoliteadobeagoda