B

String Basics

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28Find the Index of the First Occurrence in a StringKMP basics415Add StringsBig-number string addition482License Key FormattingString simulation151Reverse Words in a StringString manipulation (in-place)443String CompressionIn-place string compression6Zigzag ConversionRow simulation

S

String Parsing / State Machine

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8String to Integer (atoi)State Machine (nail edge cases)388Longest Absolute File PathStack + string parsing833Find And Replace in StringSort + string simulation777Swap Adjacent in LR StringTwo Pointers + invariant (2025/05 L3 onsite)65Valid NumberState Machine (DFA)68Text JustificationString simulation

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