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Grokking the Coding Interview Patterns in Go

Solution: Letter Case Permutation

Explore how to generate all possible permutations of a string by independently toggling letter cases and preserving digits. Understand the subsets pattern approach to build variations step-by-step, its time and space complexity, and apply this to solve letter case permutation problems efficiently.

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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 ...