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  1. import java.util.*;
  2.  
  3. class B_PhoneNumbers {
  4. 	public static void main(String[] args) throws Exception{
  5. 		Scanner scan = new Scanner(System.in);
  6. 		int n = scan.nextInt();
  7. 		String s = scan.next();
  8. 		int a = s.length() % 2 < 1 ? 2 : 3;
  9. 		for(int i = 0; i < s.length() - a; i+=2){
  10. 			System.out.print(s.substring(i,i+2)+"-");
  11. 		}
  12. 		System.out.println(s.substring(s.length()-a,s.length()));
  13. 	}
  14.  
  15. }
  16.  
Success #stdin #stdout 0.06s 213440KB
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6
549871
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54-98-71
https://ideone.com/s2bSJ
language:
Java (HotSpot 12)
created:
15 years ago
visibility:
secret

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