Master the essential algorithms and data structures that are tested in product based company interviews by practicing all the solutions from “Cracking the Coding Interview (Indian Edition)” book by Gayle laakmann McDowell, which is only available on CodeStudio. Students will be able find the textbook solutions and they can practise problems online.

Problem Title

Difficulty

Avg Time to solve

Attempted

Magic Index

93

Easy

20 mins

1909

Search In Rotated Sorted Array

127

Moderate

30 mins

8496

Intersection of Two Linked Lists

77

Easy

25 mins

4193

Ways To Make Coin Change

26

Moderate

20 mins

7923

Find Number Of Islands

28

Moderate

34 mins

999

Trapping Rain Water

31

Moderate

15 mins

2366

Maximum Subarray Sum

383

Hard

35 mins

29229

LRU Cache Implementation

26

Moderate

25 mins

1252

N Queens

39

Hard

55 mins

1372

Count Ways To Reach The N-th Stairs

85

Moderate

30 mins

8363

Palindrome Linked List

53

Easy

20 mins

3244

Partial BST

20

Moderate

25 mins

3075

Add Two Numbers As Linked Lists ll

157

Moderate

10 mins

1679

Group Anagrams

6

Moderate

30 mins

156

Two Sum

495

Easy

10 mins

5016

Search In A Row Wise And Column Wise Sorted Matrix

26

Moderate

15 mins

1473

Trailing Zeros in Factorial

18

Moderate

15 mins

445

Majority element

69

Easy

15 mins

6350

Swap Number Without Temporary Variable

8

Easy

15 mins

664

Subtree of Another Tree

9

Easy

10 mins

1060

Compress the String

14

Moderate

25 mins

376

Tic-Tac-Toe Winner

4

Easy

20 mins

44

Generate all parenthesis

15

Moderate

30 mins

326

Predecessor and Successor In BST

8

Moderate

25 mins

569

Check If Path Exists

3

Easy

10 mins

190

Magic Index NEW

Easy

93 upvotes

Search In Rotated Sorted Array NEW

Moderate

127 upvotes

Intersection of Two Linked Lists NEW

Easy

77 upvotes

Ways To Make Coin Change NEW

Moderate

26 upvotes

Find Number Of Islands NEW

Moderate

28 upvotes

Trapping Rain Water NEW

Moderate

31 upvotes

Maximum Subarray Sum NEW

Hard

383 upvotes

LRU Cache Implementation NEW

Moderate

26 upvotes

N Queens NEW

Hard

39 upvotes

Count Ways To Reach The N-th Stairs NEW

Moderate

85 upvotes

Palindrome Linked List NEW

Easy

53 upvotes

Partial BST NEW

Moderate

20 upvotes

Add Two Numbers As Linked Lists ll NEW

Moderate

157 upvotes

Group Anagrams NEW

Moderate

6 upvotes

Two Sum NEW

Easy

495 upvotes

Search In A Row Wise And Column Wise Sorted Matrix NEW

Moderate

26 upvotes

Trailing Zeros in Factorial NEW

Moderate

18 upvotes

Majority element NEW

Easy

69 upvotes

Swap Number Without Temporary Variable NEW

Easy

8 upvotes

Subtree of Another Tree NEW

Easy

9 upvotes

Compress the String NEW

Moderate

14 upvotes

Tic-Tac-Toe Winner NEW

Easy

4 upvotes

Generate all parenthesis NEW

Moderate

15 upvotes

Predecessor and Successor In BST NEW

Moderate

8 upvotes

Check If Path Exists NEW

Easy

3 upvotes

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