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- object Main extends App
- {
- val input : List[Int] = List(1, -3, 4, 2, -1)
- var w : (Boolean, Int) =
- input.foldLeft((false, 0)) { case (acc: (Boolean, Int), v: Int) =>
- if (v * acc._2 > 0) (true, v)
- else (acc._1, v)
- }
- if (w._1) print("YES")
- else print("NO")
- }
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