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Grokking the Coding Interview Patterns in C++

Solution: Reverse Integer

Understand how to reverse the digits of a 32-bit signed integer in C++ while ensuring the result stays within valid limits. Explore handling negative numbers, detecting overflow before appending digits, and optimizing for time and space complexity. This lesson helps you solve the reverse integer problem confidently during coding interviews.

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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] ...