Numbers containing 1, 2 and 3

475

10.53 
Array  Hashing  Mathematical 
lock

GoldmanSachs 
Find unique element

434

35.48 
Array  Hashing 
lock


Difference between highest and lowest occurrence

557

15.26 
Array  Hashing 
lock


Sort String

472

38.56 
Hashing  Sorting  String 
lock


Count the characters

699

22.03 
Hashing  String 
lock

Zoho 
Pairs of Non Coinciding Points

127

21.26 
Hashing  Maths 
lock


String Subsequence Game

367

15.26 
Hashing  String 
lock

Yatra 
Smallest number repeating K times

2067

26.85 
Array  Hashing 
lock


Anagram Palindrome

914

34.35 
Hashing  palindrome  String 
lock


Maximum possible sum

205

31.71 
Array  Hashing 
lock


Minimum Distinct Ids

929

21.64 
Hashing  Sorting 
lock

MorganStanley 
Mail System Design

482

19.09 
doubly linked list  Hashing  LinkedList 
lock


In First But Second

1738

38.09 
Array  Hashing 
lock

Accolite 
Minimum indexed character

1256

48.65 
Hashing  STL  String 
lock

OlaCabs 
Find distinct elements

515

16.5 
Hashing  Sorting 
lock


Sum of length

232

25.43 
Array  Hashing 
lock


Sort by Absolute Difference

1268

34.38 
Array  Hashing 
lock


Swapping pairs make sum equal

1242

33.9 
Array  Hashing 
lock


Check Arithmetic Progression

496

37.3 
Array  Hashing 
lock


Count pair sum

896

42.41 
Array  Hashing  Sorting  STL 
lock


Find pairs with given relation

306

23.86 
Array  Hashing 
lock


Kth distinct element

375

28.53 
Hashing 
lock


First Come First Serve

262

55.73 
Array  Hashing 
lock


Equivalent SubArrays

106

53.77 
Array  Hashing 
lock


Count the elements

4094

40.11 
Array  Hashing 
lock

Amazon  Yatra 
Sum equals to Sum

3346

41.18 
Array  Hashing 
lock

Amazon 
Group Anagrams Together

2279

42.78 
Hashing  String 
lock

Amazon  Snapdeal 
Uncommon characters

3792

36.08 
Hashing  String 
lock

Amazon 
Array Subset of another array

3167

36.69 
Array  Binary search  Hashing  Searching 
lock

GE  Qualcomm 
First element to occur k times

1795

22.01 
Array  Hashing 
lock


Largest Fibonacci Subsequence

1157

50.65 
Array  fibonacci  Hashing 
lock

Facebook 
Smallest distinct window

3690

25.88 
Array  Hashing  String 
lock

Amazon  Dailyhunt 
Smallest window in a string containing all the characters of another string

2851

24.38 
Hashing  String 
lock

Amazon  MakeMyTrip  Streamoid Technologi 
Zero Sum Subarrays

2260

35.22 
Array  Hashing 
lock

Microsoft 
Rahul and his Villa

296

13.18 
Array  Hashing 
lock


Fake Profile

1236

28.64 
Hashing  String 
lock


Total distance travelled in an array

706

53.68 
Array  Hashing 
lock


Find first repeated character

2257

26.45 
Hashing  String 
lock


Check if frequencies can be equal

2081

13.31 
Hashing  String 
lock


Find all pairs with a given sum

10912

13.38 
Array  Hashing 
lock

Amazon  Facebook 
Recamanâ€™s sequence

490

39.59 
Hashing  Maths  Recursion 
lock


First nonrepeating character in a stream

9284

23.47 
Hashing  LinkedList  Queue 
lock

Amazon  Flipkart  Microsoft  Payu  Yahoo 
Love For The Twins

754

46.82 
Hashing  Maths 
lock


Unique Numbers

1707

38.96 
Hashing 
lock

amazon 
Sherlock a Detective

465

40.22 
Array  Hashing 
lock


Check if two arrays are equal or not

5680

40.12 
Array  Hashing  Sorting 
lock

GoldmanSachs 
Ladoo problem

532

34.77 
Hashing 
lock


Longest K unique characters substring

1743

29.2 
Hashing  map  String 
lock

Google 
Find all four sum numbers

6822

10.35 
Array  Hashing  Sorting 
lock

Amazon  Google  Microsoft 
Tom and String

341

24.34 
Hashing  String 
lock


Demonitisation

592

18.92 
Hashing  String 
lock


Pairs with given XOR

1434

28.03 
BitAlgorithm  Hashing 
lock


Equal 0, 1 and 2

469

41.58 
Hashing  String 
lock


Satisfy the equation

735

17.01 
Hashing 
lock


Find the Odd Occurence

10706

44.8 
Array  BitAlgorithm  Hashing 
lock

Amazon  Snapdeal 
Longest consecutive subsequence

3704

44.84 
Hashing 
lock

Amazon  Walmart labs 
Lucky Number

753

23.9 
Hashing  simplemath 
lock

Epic systems 
A Simple Fraction

4683

15.67 
Hashing  Maths 
lock

Amazon  Microsoft 
Count distinct pairs with difference k

1534

45.05 
Hashing  map 
lock

Facebook 