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  1. using System;
  2. using System.Text;
  3.  
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8. 		string bign = "11212131342354364364656121";
  9. 		StringBuilder sb = new StringBuilder(bign.Length * 4 / 3);
  10. 		int jj = bign.Length % 3;
  11.  
  12. 		sb.Append(bign[0]);
  13. 		for(int i = 1;i<bign.Length;i++) {
  14. 		   if(i % 3 == jj) {
  15. 		      sb.Append(",");
  16. 		   }
  17. 		   sb.Append(bign[i]);	
  18. 		}
  19.  
  20. 		Console.WriteLine(sb.ToString());
  21. 	}
  22. }
Success #stdin #stdout 0s 131648KB
comments (?)
stdin 
Standard input is empty
stdout 
11,212,131,342,354,364,364,656,121
https://ideone.com/FDTl5Q
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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