Level 5

Backtracking

Previous Next
  • 1. Recursion basics - using factorial
  • 2. Complexity analysis of recursive programs
  • 3. Why recursion is not always good
  • 4. Time Complexity analysis of recursion
  • 5. Space complexity analysis of recursion
  • 6. Backtracking
  • 7. Backtracking Pseudocode
Subsets
Problem Score Companies Time Status
Subset 250 43:29
Combinations 300 28:25
Combination Sum 300 39:44
Combination Sum II 300 30:23
Subsets II 300 27:16
Bruteforce builder
Problem Score Companies Time Status
Letter Phone 250 42:28
Palindrome Partitioning 300 51:01
Generate all Parentheses II 350
37:18
Pruned builder
Problem Score Companies Time Status
Palindrome Partitioning 300 51:01
Generate all Parentheses II 350
37:18
NQueens 550 56:26
Sudoku 700 54:58
Permutations
Problem Score Companies Time Status
Permutations 350 28:44
Maths and backtracking
Problem Score Companies Time Status
Gray Code 350
40:19
Kth Permutation Sequence 350 71:43
Game solving
Problem Score Companies Time Status
NQueens 550 56:26
Sudoku 700 54:58
Click here to jump start your coding interview preparation