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: Wrong Answer)

using System;
using System.Collections.Generic;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> inputStling = new List<string>();

            string[] input = Console.ReadLine().Split(' ');
            int inputNumber = int.Parse(input[0]);
            int inputLength = int.Parse(input[1]);

            for(int i = 0; i <= inputNumber - 1; i++)
            {
                inputStling.Add(Console.ReadLine());
            }

            inputStling.Sort();

            string[] inputStringSorted = inputStling.ToArray();
            string outputString = string.Empty;
            for (int i = 0; i <= inputNumber - 1; i++)
            {
                outputString = outputString + inputStringSorted[i];
            }

            Console.WriteLine(outputString);
        }
    }
}