import java.util.*; public class Run { public static void main (String arg[]) { Scanner scan = new Scanner(System.in); String ans = "YES"; int a = scan.nextInt(); int b = scan.nextInt(); int c = scan.nextInt(); int tmp1 = a / b; int tmp2 = a / c; if (a%b!=0) tmp1++; if (a%c!=0) tmp2++; if ((tmp2*10)/tmp1 < 15) ans = "NO"; System.out.println(ans); } }