import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader read = new BufferedReader(new InputStreamReader(System.in));

		try {
			int a = Integer.parseInt(read.readLine());
			int b = Integer.parseInt(read.readLine());
			int c = Integer.parseInt(read.readLine());

			int normal = a / b;
			if (a % b > 0) {
				++normal;
			}

			int campaign = a / c;
			if (a % c > 0) {
				++campaign;
			}

			if (((normal * 2) / 3) >= campaign) {
				System.out.println("YES");
			} else {
				System.out.println("NO");
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}