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;

namespace gositigo{
  class Program{
    static void Main(string[] args)
    {
      String[] s = ReadLine().Split(' ');
      int[] n = new int[3];
      for(int i = 0; i < 3; i++){
        n[i] = int.Parse(s[i]);
      }
      string ans = "NO";
      
      if(n[0] + n[1] + n[2] == 17){
        if(n[0] + n[1] == 12){
          if(n[2] == 5) {
            WriteLine("YES");
            return;
          }
        }else if(n[0] + n[1] == 10){
          if(n[2] == 7) {
            WriteLine("YES");
            return;
          }
        }
      }
      WriteLine(ans);
      
    }
  }
}