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: Runtime Error)

using System;

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

            while (x < 3) {
                str = Console.ReadLine();

                if (int.Parse(str) == 5)
                {
                    countF++;
                }
                else if (int.Parse(str) == 7)
                {
                    countS++;
                }
                else
                {
                }
                x++;
            }
            
            if (countF == 2 && countS == 1)
            {
                Console.WriteLine("YES");
            }
            else 
            {
                Console.WriteLine("No");
            }

        }
    }
}