Level 5

Backtracking

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  • 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 43:15
Combinations 300 27:40
Combination Sum 300 38:33
Combination Sum II 300 30:41
Subsets II 300 26:50
Bruteforce builder
Problem Score Companies Time Status
Letter Phone 250 42:47
Palindrome Partitioning 300 51:35
Generate all Parentheses II 350
37:31
Pruned builder
Problem Score Companies Time Status
Palindrome Partitioning 300 51:35
Generate all Parentheses II 350
37:31
NQueens 550 56:14
Sudoku 700 54:48
Permutations
Problem Score Companies Time Status
Permutations 350 28:21
Maths and backtracking
Problem Score Companies Time Status
Gray Code 350
40:18
Kth Permutation Sequence 350 71:54
Game solving
Problem Score Companies Time Status
NQueens 550 56:14
Sudoku 700 54:48
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