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;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            bool isSevne = false;
            bool isFive1 = false;
            bool isFive2 = false;

            string[] input = Console.ReadLine().Split(' ');
            if (input.Length < 3) {
                Console.WriteLine("NO");
                return;
            }

            for(int i = 0; i <= input.Length - 1; i++)
            {
                if(input[i] == "7") { isSevne = true; }
                if(input[i] == "5")
                {
                    if (isFive1)
                    {
                        isFive2 = true;
                    }
                    else
                    {
                        isFive1 = true;
                    }
                }
            }

            if(isSevne && isFive1 && isFive2)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}