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.Linq;

namespace A_Iroha_and_Haiku_Easy
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            var inputs = Console.ReadLine().Split(' ')
                .Select(x => int.Parse(x)).ToArray();

            var fiveCount = 0;
            var sevenCount = 0;
            foreach (var number in inputs)
            {
                if (number == 5)
                {
                    fiveCount++;
                }
                if (number == 7)
                {
                    sevenCount++;
                }
            }
            if ((fiveCount == 2) && (sevenCount == 1))
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}