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public static void main(String[] args){ Scanner in = new Scanner(System.in); int testCases = Integer.parseInt(in.nextLine()); while(testCases>0){ String pattern = in.nextLine(); try{ Pattern.compile(pattern); System.out.println("Valid"); } catch(PatternSyntaxException ex){ System.out.println("Invalid"); } testCases --; }
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Pattern Syntax Checker
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