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;
class Program
{
	static void Main(string[] args)
	{
	   string[] inputs = Console.ReadLine().Split(' ');
	   int five = 0;
	   int seven = 0;
	   string result = "NO";
	   
	   for (int i = 0; i < 3; i++)
	   {
	      if(inputs[i] == "5"){five++;}
	      if(inputs[i] == "7"){seven++;}
	   }
	   if(five == 2 && seven == 1){result = "YES";}
	   
	   Console.WriteLine(result);
	}
}