Pattern 18: Backtracking

• List of problems I have solved so far
  • Easy
  • Medium
  • Hard

List of problems I have solved so far

Easy

Question	Solution	Date	Comment
257. Binary Tree Paths	Solution
401. Binary Watch	Solution
1863. Sum of All Subset XOR Totals	Solution
	Solution

Medium

Question	Solution	Date	Comment
17. Letter Combinations of a Phone Number	Solution
39. Combination Sum	Solution
46. Permutations	Solution
77. Combinations	Solution
78. Subsets	Solution
93. Restore IP Addresses	Solution
131. Palindrome Partitioning	Solution
	Solution

Hard

Question	Solution	Date	Comment
37. Sudoku Solver	Solution
51. N-Queens	Solution
140. Word Break II	Solution
	Solution