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  1. //(c)Terminator
  2. import java.util.*;
  3. import java.lang.*;
  4. import java.io.*;
  5.  
  6.  
  7. final class Space {
  8.     public static StringBuilder Insert(StringBuilder s) {
  9.         for (int i = s.length() - 3; i > 0; i -= 3)
  10.             s.insert(i, ' ');
  11.         return s;
  12.     }
  13. }
  14.  
  15.  
  16.  
  17. class Terminator {
  18. 	public static void main (String[] args){
  19.         StringBuilder s = new StringBuilder("1234567897770");
  20.         System.out.println( Space.Insert(s) ); 
  21. 	}
  22. }
Success #stdin #stdout 0.1s 320256KB
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stdin
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Standard input is empty
stdout
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1 234 567 897 770
https://ideone.com/6XNLK3
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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