import sys
import os
f = open("C:/Users/user/Documents/python/yukicoder/import.txt","r")
sys.stdin = f

# -*- coding: utf-8 -*-

a,b = map(int,input().split())


if a >= b:
    print("No")
    print(a-b+1)
else:
    print("YES")
    print(b-a-1)