import java.util.*;
import java.io.*;

public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        PrintWriter pw = new PrintWriter(System.out);
        int N = sc.nextInt();
        int S = sc.nextInt();
        int X = (S+N-1)/N;
        pw.println( 25 <= X && X < 30 ? "Yes" : "No" );
        
        pw.flush();
        
    }
    
}