package main

import(
    "fmt"
)

func main(){
	var A,B int
	fmt.Scan(&A,&B)
	A = A + 1
	if A == B{
		fmt.Println("YES")
		fmt.Println(A-B)
	}else if A < B{
		fmt.Println("YES")
		fmt.Println(B-A)
	}else if A > B{
		fmt.Println("NO")
		fmt.Println(A-B)
	}
}