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;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


    class Program
    {
        static void Main(string[] args)
        {
          string[] Input = Console.ReadLine().Split(' ');
          int go = 0;
          int nana = 0;
          for(int i = 0; i < Input.Length; i++)
          {
           if(Input[i] == "5")
           {
             go++;
           }
            else if(Input[i] == "7")
           {
             nana++;
           }
          }
          
          if(go == 2 && nana == 1)
          {
            Console.WriteLine("YES");
          }
          else
          {
            Console.WriteLine("NO");
          }
        }
    }