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: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace abc042
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string a = Console.ReadLine();
            string b = Console.ReadLine();
            string c = Console.ReadLine();
            int count5 = 0;
            int count7 = 0;

            List<String> listStr = new List<string>();

            listStr.Add(a);
            listStr.Add(b);
            listStr.Add(c);

            count5 = (from str5 in listStr
                      where str5 == "5"
                      select str5).Count();

            count7 = (from str7 in listStr
                      where str7 == "7"
                      select str7).Count();

            if (count5 == 2 && count7 == 2)
            {
                Console.Write("YES");
            }
            else
            {
                Console.Write("No");
            }

            Console.WriteLine();
        }
    }
}