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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {
    private static final String YES = "YES";
    private static final String NO = "NO";

    public static String process(TestCase testCase) {
        int X = testCase.X;

        return is753(X) ? YES : NO;
    }

    private static boolean is753(int x) {
        return x == 7 || x == 5 || x == 3;
    }

    // Util func

    public static void main(String[] args) {
        TestCase testCase = readFromInput();

        final String result = process(testCase);

        output(result);
    }

    private static TestCase readFromInput() {
        Scanner sc = new Scanner(System.in);

        int X = sc.nextInt();

        sc.close();
        return new TestCase(X);
    }

    private static void output(String result) {
        System.out.println(result);
    }

    public static class TestCase {
        final int X;

        public TestCase(int X) {
            this.X = X;
        }
    }
}