import java.util.*; class Test36{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); int a = sc.nextInt(); int b = sc.nextInt(); int c = sc.nextInt(); int count1 = 0; int count2 = 0; int d = a; while(a>0){ a -= b; count1++; } while(d>0){ d -= c; count2++; } if(count2>=(count1*(2/3))){ System.out.println("YES"); }else{ System.out.println("NO"); } } }