mediumGrind 75
String to Integer Conversion
Also known as: String to Integer (atoi)
Convert string to 32-bit signed integer Handle whitespace, sign, overflow Example: " -042" => -42
String to Integer Conversion is a great reminder that off-by-one errors love strings. Interviewers love it because it reveals your rule-based parsing and your edge-case discipline. The trap is hidden edge cases—empty input, repeated characters, and boundary indexing.
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1Part 1: String to Integer (atoi)medium
Based onLeetCode