use std::io::prelude::*;
fn main() {
    let stdin = std::io::stdin();
    let line = stdin.lock().lines().next().unwrap().unwrap();
    let mut tokens = line.split_ascii_whitespace();
    let _a = tokens.next().unwrap();
    let p = tokens.next().unwrap();
    let q = tokens.next().unwrap();
    print!("{}", if p != q { "Yes" } else { "No" });
}