Solve top Backtracking and Recursive Interview Questions and be prepared for placements by practicing on CodeStudio.

Problem Title

Difficulty

Avg Time to solve

Attempted

Reverse Stack Using Recursion

32

Easy

21 mins

552

Look-And-Say Sequence

4

Easy

15 mins

57

Print Permutations - String

27

Easy

30 mins

325

Sudoku?

80

Moderate

40 mins

259

Word Break-1

25

Moderate

36 mins

200

Rat In a Maze All Paths

112

Moderate

40 mins

346

N Queens

19

Hard

55 mins

189

Pair Swap

6

Moderate

40 mins

169

Leaves One Level Apart

4

Moderate

40 mins

153

Right View

4

Moderate

35 mins

213

Validate BST

4

Moderate

25 mins

577

Palindrome Partitioning

4

Hard

25 mins

178

Convert Bst To The Greater Sum Tree

4

Moderate

30 mins

255

Maze with N doors and 1 Key

3

Moderate

15 mins

252

Permutations

3

Moderate

10 mins

86

Reverse Alternate K nodes

1

Easy

10 mins

41

Remove Consecutive Duplicates

7

Easy

mins

484

Merge Sort Linked List

5

Moderate

10 mins

68

Sort Stack

7

Easy

20 mins

122

Factor Combinations

4

Moderate

35 mins

32

Letter Case Permutation

0

Moderate

15 mins

26

Count of Matches in Tournament

3

Easy

20 mins

80

Ninja And Flip Game

1

Easy

15 mins

7

Increasing Order Search Tree

3

Easy

15 mins

21

What will be the ‘k-th’ bit?

2

Moderate

20 mins

22

Reverse Stack Using Recursion NEW

Easy

32 upvotes

Look-And-Say Sequence NEW

Easy

4 upvotes

Print Permutations - String NEW

Easy

27 upvotes

Sudoku? NEW

Moderate

80 upvotes

Word Break-1 NEW

Moderate

25 upvotes

Rat In a Maze All Paths NEW

Moderate

112 upvotes

N Queens NEW

Hard

19 upvotes

Pair Swap NEW

Moderate

6 upvotes

Leaves One Level Apart NEW

Moderate

4 upvotes

Right View NEW

Moderate

4 upvotes

Validate BST NEW

Moderate

4 upvotes

Palindrome Partitioning NEW

Hard

4 upvotes

Convert Bst To The Greater Sum Tree NEW

Moderate

4 upvotes

Maze with N doors and 1 Key NEW

Moderate

3 upvotes

Permutations NEW

Moderate

3 upvotes

Reverse Alternate K nodes NEW

Easy

1 upvote

Remove Consecutive Duplicates NEW

Easy

7 upvotes

Merge Sort Linked List NEW

Moderate

5 upvotes

Sort Stack NEW

Easy

7 upvotes

Factor Combinations NEW

Moderate

4 upvotes

Letter Case Permutation NEW

Moderate

0 upvotes

Count of Matches in Tournament NEW

Easy

3 upvotes

Ninja And Flip Game NEW

Easy

1 upvote

Increasing Order Search Tree NEW

Easy

3 upvotes

What will be the ‘k-th’ bit? NEW

Moderate

2 upvotes

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