Solution: Letter Case Permutation
Explore how to generate all possible variations of a string by changing each letter to lowercase or uppercase while leaving digits unchanged. This lesson teaches you how to apply the subsets pattern to build these permutations step-by-step. Understand the algorithm’s time and space complexity to efficiently solve letter case permutation problems in coding interviews.
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Statement
Given a string, s, consisting of letters and digits, generate all possible variations by modifying each letter independently to be either lowercase or uppercase while keeping the digits unchanged. Each letter in the ...