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  1. import java.util.*;
  2. import java.util.function.*;
  3. import java.lang.*;
  4. import java.io.*;
  5.  
  6. /* Name of the class has to be "Main" only if the class is public. */
  7. class Ideone
  8. {
  9.  
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12.         Recursive<Function<Integer,Integer>> sumDigits = new Recursive<>();
  13. 		sumDigits.func = (Integer number) -> {
  14. 		    int s = Arrays.asList( String.valueOf(number).split("") )
  15. 		        .stream()
  16.                 .map(Integer::valueOf)
  17.                 .mapToInt(i->i)
  18.                 .sum();
  19.             return s < 10 ? s : sumDigits.func.apply(s);
  20. 		};
  21. 		System.out.println(sumDigits.func.apply(100) == 1);
  22. 		System.out.println(sumDigits.func.apply(101) == 1);
  23. 		System.out.println(sumDigits.func.apply(55) == 1);
  24. 		System.out.println(sumDigits.func.apply(56) == 1);
  25. 	}
  26. 	static class Recursive<I> {
  27.         public I func;
  28.     }
  29.  
  30. }
  31.  
Success #stdin #stdout 0.2s 320832KB
comments (?)
stdin 
Standard input is empty
stdout 
true
false
true
false
https://ideone.com/I0ievI
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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