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Grokking the Coding Interview Patterns in C++

Solution: Decode String

Explore how to decode encoded strings following the pattern k[encoded_string] by applying a stack-based solution. Understand how to handle nested and sequential encoded segments by managing repeat counts and substrings effectively. Learn step-by-step processing of each character in the string to build the decoded output, developing your ability to solve similar problems in coding interviews.

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Statement

Given an encoded string, return its decoded version. The encoding rule follows the pattern: k[encoded string]k[encoded~string], where the encoded stringencoded~string is repeated exactly kk times.

Note: The kk is guaranteed to be a positive integer.

Assume that the input string is ...