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;

namespace AtCoder {
    class _042a {
        static void Main() {
            string[] input = Console.ReadLine().Split(' ');
            int five = 0;
            int seven = 0;
            foreach(string s in input) {
                int x = int.Parse(s);
                if(x == 5) {
                    five++;
                }
                else if(x == 7) {
                    seven++;
                }
                else {
                    five = 0;
                    seven = 0;
                    break;
                }
            }
            if(five == 2 && seven == 1) {
                Console.WriteLine("YES");
            }
            else {
                Console.WriteLine("NO");
            }
        }
    }
}