func main()
	var ss: [][]char :: cui@input().split(" ")
	var n: int :: ss[0].toInt(&)
	var m: int :: ss[1].toInt(&)
	var x: int :: ss[2].toInt(&)
	var ans: bool :: m + x - n >= 3
	do cui@print("\{ans ?("YES", "NO")}\n")
end func