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  1. import java.util.List;
  2.  
  3. class Ideone {
  4.  
  5. 	public static void main(String[] args) {
  6. 		List<String> input = List.of("abc", "yahoo", "opinion", "aaaaaabc");
  7.  
  8. 		for (String s: input) {
  9. 			System.out.println( s + " => " + s.replaceAll("(?:((.)\\2)|(.))", "$1$3$3") );
  10. 		}
  11. 	}
  12. }
  13.  
Success #stdin #stdout 0.14s 37324KB
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stdin
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Standard input is empty
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abc => aabbcc
yahoo => yyaahhoo
opinion => ooppiinniioonn
aaaaaabc => aaaaaabbcc
https://ideone.com/IhRZ20
language:
Java (HotSpot 12)
created:
1 year ago
visibility:
secret

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