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;
using System.Text;

namespace AtCoderBC042 {
  class AtCoderBC042 {
    static void Main(string[] args) {
      new AtCoderBC042().solve1();
    }

    private void solve1() {
      string[] input = Console.ReadLine().Split();
      int[] a = Array.ConvertAll(input, Int32.Parse);
      int cc = 0; int cs = 0;
      foreach (int x in a) {
        if (x == 5)
          cc++;
        if (x == 7)
          cs++;
      }
      Console.WriteLine(cc == 2 && cs == 1 ? "YES" : "NO");     
    }//end M.

  }
}