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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
  static void Main()
  {
    var nums = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
    var n5 = 0;
    var n7 = 0;
    foreach (var i in nums)
    {
      if (i == 5) n5++;
      if (i == 7) n7++;
    }
    if (n5 == 2 && n7 == 1) Console.WriteLine("YES");
    else Console.WriteLine("NO");
  }
}