Recursion & Backtracking

Subsets, permutations, puzzles and divide and conquer.

16 problems

Title	Tags	Acceptance	Difficulty
1. All Subsets	Backtracking · Bitmask	—	Medium
2. All Permutations	Backtracking	—	Medium
3. Unique Permutations	Backtracking	—	Medium
4. Combinations of K	Backtracking	—	Medium
5. Combination Sum	Backtracking	—	Medium
6. Subset Sum	Dynamic Programming	—	Medium
7. N-Queens Solutions Count	Backtracking	—	Hard
8. Word Search	DFS · Backtracking	—	Medium
9. Phone Keypad Combinations	Backtracking	—	Medium
10. Generate Parentheses	Backtracking	—	Medium
11. Tower of Hanoi	Recursion	—	Easy
12. Grid Paths	Combinatorics · Recursion	—	Easy
13. Palindrome Partitions	Backtracking	—	Medium
14. Gray Code	Bits · Recursion	—	Medium
15. Sudoku Solver	Backtracking	—	Hard
16. Rat in a Maze	Backtracking · DFS	—	Medium

16 of 16 problems