Computer Science · Algorithms
To validate email addresses in a user registration form, a regular expression pattern matching operation is performed. In the worst-case, a naive backtracking match of a pattern of length m against a string of length n has a time complexity proportional to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1O(1)
- 2O(log m)
- 3O(n × m)✓
- 4O(n + m)
Correct answer
O(n × m)
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