fn main() {
    let mut buf = String::new();
    let mut input = {
        use std::io::Read;
        std::io::stdin().read_to_string(&mut buf).unwrap();
        buf.split_whitespace()
    };

    let n: usize = input.next().unwrap().parse().unwrap();
    let s: usize = input.next().unwrap().parse().unwrap();

    let output = match n {
        1 => {
            if s >= 25 && s < 30 {
                "Yes"
            } else {
                "No"
            }
        }
        _ => {
            if s < 25 {
                "No"
            } else if s < 30 {
                "Yes"
            } else {
                if (s - 29) < 29 * (n - 1) {
                    "Yes"
                } else {
                    "No"
                }
            }
        }
    };

    println!("{}", output);
}