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[] s = Console.ReadLine().Split();

        int fivecnt = 0;
        int sevencnt = 0;

        for(int i = 0; i < s.Length; i++)
        {
            int x = int.Parse(s[i]);
            if (x == 5) fivecnt++;
            if (x == 7) sevencnt++;
        }
        if (fivecnt == 2 && sevencnt == 1) Console.WriteLine("YES");
        else Console.WriteLine("NO");
    }
}