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;

public class Hello
{
    public static void Main()
    {
string[] input = Console.ReadLine().Split(' ');
int b = int.Parse(input[0]);
int c = int.Parse(input[1]);
int d = int.Parse(input[2]);

if (b == 7){
    if (c == 5){
        if (d == 5){Console.WriteLine("YES");}else {Console.WriteLine("NO");}
                ;}else {Console.WriteLine("NO");}
            }
                
else if (c == 7){
        if (b == 5){
            if (d == 5){Console.WriteLine("YES");}else {Console.WriteLine("NO");}
                ;}else {Console.WriteLine("NO");}
            }
            
else if (d == 7){
        if (c == 5){
            if (b == 5){Console.WriteLine("YES");}else {Console.WriteLine("NO");}
                ;}else {Console.WriteLine("NO");}
            }
else Console.WriteLine("NO");
    }
}