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 48:29
Combinations 300 34:22
Combination Sum 300 47:09
Combination Sum II 300 31:43
Subsets II 300 29:38
Bruteforce builder
Problem Score Companies Time Status
Letter Phone 250 43:57
Palindrome Partitioning 300 53:08
Generate all Parentheses II 350
41:06
Pruned builder
Problem Score Companies Time Status
Palindrome Partitioning 300 53:08
Generate all Parentheses II 350
41:06
NQueens 550 58:28
Sudoku 700 58:09
Permutations
Problem Score Companies Time Status
Permutations 350 31:37
Maths and backtracking
Problem Score Companies Time Status
Gray Code 350
45:21
Kth Permutation Sequence 350 71:58
Game solving
Problem Score Companies Time Status
NQueens 550 58:28
Sudoku 700 58:09
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