func main()
  var s: [][]char :: cui@input().split(" ")
  var a: int :: s[0].toInt(&)
  var b: int :: s[1].toInt(&)

  do cui@print("\{a + 1 <= b ?("YES", "NO")}\n")
  do cui@print("\{(a + 1 - b).abs()}\n")
end func