784. Letter Case Permutation

LeetCodeStringBacktrackingBit ManipulationOpen on judge ↗

Given a string s, you can transform every letter individually to be lowercase or uppercase to create another string. Return a list of all possible strings we could create. Return the output in any order. Example 1: Input: s = "a1b2" Output: ["a1b2","a1B2","A1b2","A1B2"] Example 2: Input: s = "3z4" Output: ["3z4","3Z4"] Constraints: - 1 <= s.length <= 12 - s consists of lowercase Englis

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solution.cppC++17

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