public class No_218 {

	public static void main(String[] args) {
		java.util.Scanner sc = new java.util.Scanner(System.in);
		int valueToNextLevel = sc.nextInt();
		int reinforcement = sc.nextInt();
		int campaign = sc.nextInt();
		float kasetsu = (float)(valueToNextLevel / campaign) / (valueToNextLevel / reinforcement);
		String answer = kasetsu == (float) 2 / 3 ? "YES" : "NO";
		System.out.println(answer);

	}

}