Problem:
Score : 100 points

Problem Statement

Shichi-Go-San (literally "Seven-Five-Three") is a traditional event in a certain country to celebrate the growth of seven-, five- and three-year-old children.

Takahashi is now X years old. Will his growth be celebrated in Shichi-Go-San this time?

Constraints

1 ≤ X ≤ 9

X is an integer.

Input

Input is given from Standard Input in the following format:

X

Output

If Takahashi's growth will be celebrated, print YES; if it will not, print NO.

Sample Input 1

5

Sample Output 1

YES

The growth of a five-year-old child will be celebrated.

Sample Input 2

6

Sample Output 2

NO

See you next year.

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

namespace AtCoder.ABC114
{
    public class A
    {
        public static void Solve()
        {
            string[] input = Console.ReadLine().Split(' ');
            int n = int.Parse(input[0]);
            string output;

            switch (n)
            {
                case 7:
                    output = "YES";
                    break;
                case 5:
                    output = "YES";
                    break;
                case 3:
                    output = "YES";
                    break;
                default:
                    output = "NO";
                    break;
            }
            
            Console.WriteLine(output);
        }    
    }
}

namespace AtCoder {
    class Program
    {
        static void Main(string[] args)
        {
            ABC114.A.Solve();
        }
    }
}