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 static System.Console;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] input = ReadLine().Split(' ').Select(s => int.Parse(s)).ToArray();

        int count_5 = 0;
        int count_7 = 0;

        foreach (int n in input)
        {
            if (n == 5)
            {
                count_5++;
            }
            else if (n == 7)
            {
                count_7++;
            }
        }

        if (count_5 == 2 && count_7 == 1)
        {
            WriteLine("YES");
        }
        else
        {
            WriteLine("NO");
        }

        ReadKey();
    }
}