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  1. using System;
  2.  
  3. public class Test
  4. {
  5. public static void Main()
  6. {
  7. Console.WriteLine(b(101010));
  8. }
  9.  
  10. static long b(long n){return n>0?n%10+2*b(n/10):0;}
  11. }
Success #stdin #stdout 0.01s 29664KB
stdin
Standard input is empty
stdout
42