import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    double p = sc.nextDouble();
    double q = sc.nextDouble();
    String ans = "NO";
    if(p * q + 1 - 2 * p < 0) ans = "YES";
    System.out.println(ans);
  }
}