package main

import(
	"bufio"
    "fmt"
	"os"
	"strings"
	"strconv"
)

func main(){
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Scan()
	number := strings.Split(scanner.Text()," ")
	A,_ := strconv.Atoi(number[0])
	A = A + 1
	B,_ := strconv.Atoi(number[1])
	if A == B{
		fmt.Println("YES")
		fmt.Println(A-B)
	}else if A > B{
		fmt.Println("NO")
		fmt.Println(A-B)
	}else if B > A{
		fmt.Println("NO")
		fmt.Println(B-A)
	}
}