package main
import (
"bufio"
"fmt"
"os"
)
func main() {
reader := bufio.NewReader(os.Stdin)
var n int
fmt.Fscan(reader , &n)
if n%2==1{
fmt.Println("YES")
}else{
fmt.Println("NO")
}
}

package main
import (
"bufio"
"fmt"
"os"
)
func main() {
reader := bufio.NewReader(os.Stdin)
var n int
fmt.Fscan(reader , &n)
if n%2==1{
fmt.Println("YES")
}else{
fmt.Println("NO")
}
}