Regex causes catastrophic backtracking
Review this input validation.
What a strong answer looks like
Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.
0:00 of about 18 min
Mark a line and say what kind of problem it is.0 findings
1import re
2def valid(s):
3 return re.match(r'^(a+)+$', s) is not None
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