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Grokking the Coding Interview Patterns

Solution: Reverse Integer

Understand how to reverse a 32-bit signed integer by extracting and appending digits safely. Learn to handle overflow cases using boundary checks and ensure the result remains within the integer range, applying this common coding interview pattern effectively.

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Statement

Given a 32-bit signed integer num, reverse its digits and return the result. If the reversed number exceeds the 32-bit signed integer range [−231,231−1][−2^{31},2^{31}−1] ...