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  1. object Main extends App {
  2.  def sum(xs: List[Int]): Int = {
  3.     if(xs.isEmpty) 
  4.         0
  5.      println("" + xs)
  6.     // xs.head + sum(xs.tail)
  7.   }
  8.  
  9.   println(sum(List(1,2,3,4)))
  10.  
  11. 	// your code goes here
  12. }
Compilation error #stdin compilation error #stdout 0.35s 382016KB
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stdin
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Standard input is empty
compilation info 
/opt/scala/bin/scalac: line 50: /dev/null: Permission denied
Main.scala:5: error: type mismatch;
 found   : Unit
 required: Int
     println("" + xs)
            ^
one error found
spoj: The program compiled successfully, but Main.class was not found.
      Class Main should contain method: def main(args: Array[String]).
stdout
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Standard output is empty
https://ideone.com/8uJxrX
language:
Scala (scala 2.12.8)
created:
9 years ago
visibility:
public

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