import java.util.*;

public class Main {
    private void solve() {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int x = a / b + (a%b>0 ? 1 : 0);
        int y = a / c + (a%c>0 ? 1 : 0);
        String res;
        if(2*x >= 3*y) { res = "YES"; }
        else { res = "NO"; }
        System.out.println(res);
    }

    public static void main(String[] args) {
        new Main().solve();
    }
}