Backtracking
Leetcode 1415. The k-th Lexicographical String of All Happy Strings of Length n
·5 mins
Data Structure and Algorithms
LeetCode Solutions
Leetcode-Solutions
Backtracking
Dfs
Combinations
Leetcode 1079. Letter Tile Possibilities
·1 min
LeetCode Solutions
Leetcode-Solutions
Backtracking
Dfs
Combinations
Permutations