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Grokking the Coding Interview Patterns in Go

Solution: Letter Case Permutation

Explore how to generate all possible letter case permutations of a string by iterating through each character and building combinations based on letters and digits. Understand the subsets pattern applied to solve the problem and analyze the time and space complexity involved.

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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 ...