use proconio::{fastout, input};

#[fastout]
fn main() {
    input! {
        s: u8,
        t: u8,
        c: char,
    }

    println!("{}", output(solve(s, t, c)))
}

fn solve(s: u8, t: u8, c: char) -> bool {
    match c {
        '<' => s < t,
        '>' => s > t,
        '=' => s == t,
        _ => unreachable!(),
    }
}

fn output(ans: bool) -> &'static str {
    match ans {
        true => "YES",
        false => "NO",
    }
}