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;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int countF = 0;
            int countS = 0;
            string str;

            for (int i = 0; i < 3; i++) {
                str = Console.ReadLine();

                switch (str) 
                {
                    case "5":
                        countF++;
                        break;
                    case "7":
                        countS++;
                        break;
                    default:
                        break;
                }
            }

            if (countF == 2 && countS == 1)
            {
                Console.WriteLine("YES");
            }
            else 
            {
                Console.WriteLine("No");
            }
            Console.ReadKey();
        }
    }
}