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: Accepted)

package main
import (
  // "bufio"
  // "os"
  // "strconv"
  // "strings"
  "fmt"
  // "math"
  // "sort"
)

// 行単位で読み込む場合
// var sc = bufio.NewScanner(os.Stdin)

func main() {
  var N int
  fmt.Scan(&N)

  if N == 3 || N == 5 || N == 7 {
    fmt.Println("YES")
  } else {
    fmt.Println("NO")
  }
}