import java.util.*;

public class Main {
  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 num1 = (a + b - 1) / b;
    int num2 = (a + c - 1) / c;
    String ans = "NO";
    if(2 * num1 >= 3 * num2) ans = "YES";
    System.out.println(ans);
  }
}