func main()
	var a: int :: cui@input().toInt(&)
	var b: int :: cui@input().toInt(&)
	var c: int :: cui@input().toInt(&)
	var ans: bool :: ((a + b - 1) / b) * 2 >= ((a + c - 1) / c) * 3
	do cui@print(ans ?("YES\n", "NO\n"))
end func