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  1. using System;
  2. using System.Collections;
  3. using System.Linq;
  4.  
  5. public class Test
  6. {
  7.     public static void Main()
  8. 	{
  9.         var str="2017991";
  10.         var n=2;
  11.         Console.WriteLine( 
  12.             String.Join("/",
  13.                 Enumerable.Range(0, (str.Length+n-1) / n -1 )
  14.                // .AsParallel()
  15.                 .Select(i => str.Substring(i * n, n))
  16.                 .ToArray()
  17.             )
  18.         );		
  19. 	}
  20. }
Success #stdin #stdout 0.03s 33848KB
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20/17/99
https://ideone.com/jZWel5
language:
C# (gmcs 5.20.1)
created:
13 years ago
visibility:
public

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