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 49:16
Combinations 300 34:53
Combination Sum 300 47:53
Combination Sum II 300 32:01
Subsets II 300 30:13
Bruteforce builder
Problem Score Companies Time Status
Letter Phone 250 44:23
Palindrome Partitioning 300 53:44
Generate all Parentheses II 350
41:42
Pruned builder
Problem Score Companies Time Status
Palindrome Partitioning 300 53:44
Generate all Parentheses II 350
41:42
NQueens 550 59:00
Sudoku 700 57:59
Permutations
Problem Score Companies Time Status
Permutations 350 32:01
Maths and backtracking
Problem Score Companies Time Status
Gray Code 350
46:15
Kth Permutation Sequence 350 71:39
Game solving
Problem Score Companies Time Status
NQueens 550 59:00
Sudoku 700 57:59
Click here to start solving coding interview questions