you also need check_if_negative to detect close-before-open | Hacker News

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		stellalo 4 months ago \| parent \| context \| favorite \| on: A Brutal Look at Balanced Parentheses, Computing M... you also need check_if_negative to detect close-before-open

jibal 4 months ago [–]

The counter is at 0, which indicates an error ... that plus the counter being non-zero when reaching the end of input is the entire point.

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