using System;
using System.Collections.Generic;
using System.Linq;
public class Program{
    public static void Main(){
        var line = Console.ReadLine().Split(' ');
        var s = double.Parse(line[0]);
        var n = double.Parse(line[1]);
        if(n/s>=30){
            Console.WriteLine("No");
        }
        else if(n<25){
            Console.WriteLine("No");
        }
        else{
            Console.WriteLine("Yes");
        }
    }
}