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 Go (1.6) (judge verdict: Wrong Answer)

package main

import (
	"bufio"
	"os"
	"strconv"
)

func main() {

	stdin := bufio.NewScanner(os.Stdin)
	stdin.Split(bufio.ScanLines)

	if ok := stdin.Scan(); !ok {
		print("Error to scan.")
	}

	if err := stdin.Err(); err != nil {
		print("Error to scan.")
	}

	age, err := strconv.Atoi(stdin.Text())
	if err != nil {
		print("Error to parse.")
	}

	switch age {
	case 3, 5, 7:
		print("YES")
	default:
		print("NO")
	}
}