Problem:
Score : 100 points

Problem Statement

Iroha loves Haiku. Haiku is a short form of Japanese poetry. A Haiku consists of three phrases with 5, 7 and 5 syllables, in this order.

To create a Haiku, Iroha has come up with three different phrases. These phrases have A, B and C syllables, respectively. Determine whether she can construct a Haiku by using each of the phrases once, in some order.

Constraints

1≦A,B,C≦10

Input

The input is given from Standard Input in the following format:

A B C

Output

If it is possible to construct a Haiku by using each of the phrases once, print YES (case-sensitive). Otherwise, print NO.

Sample Input 1

5 5 7

Sample Output 1

YES

Using three phrases of length 5, 5 and 7, it is possible to construct a Haiku.

Sample Input 2

7 7 5

Sample Output 2

NO

Solution in Scala (2.11.7) (judge verdict: Accepted)

import scala.io.StdIn._
 
object Main {
  def main(args: Array[String]): Unit = {
    println(
      confirm(
        isHaiku(Helper.readToListInts)
      )
    )
  }
 
  def isHaiku(list: List[Int]) : Boolean =
    list.count(n => n == 5) == 2 && list.count(n => n == 7) == 1
 
  def confirm(isHaiku: Boolean): String = if (isHaiku) "YES" else "NO"
}
 
 
 
object Helper {
  def readToListInts: List[Int] = readLine.split(" ").map(_.toInt).toList
  def readToVectorInts: Vector[Int] = readLine.split(" ").map(_.toInt).toVector
}