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;

public class Test
{
	public static void Main()
	{
		string[] str = Console.ReadLine().Split(' ');
		int a = Array.IndexOf(str, "7");
		if(a == -1){
			Console.WriteLine("NO");
		}
		else if(a == 0 && str[1].Equals('5')&& str[2].Equals('5')){
			Console.WriteLine("YES");
		}
        else if(a == 1 && str[0].Equals('5')&& str[2].Equals('5')){
			Console.WriteLine("YES");
		}
		else if(a == 2 && str[1].Equals('5')&& str[0].Equals('5')){
			Console.WriteLine("YES");
		}
		else{
			Console.WriteLine("NO");
		}
	}
}