use std::io::stdin;

fn main() {
    let mut line: String = String::new();
    stdin().read_line(&mut line).expect("Fail.");
    let buf_list: Vec<u64> = line.trim().split_whitespace().map(|e| e.parse().unwrap()).collect();

    let i: u64 = buf_list[0];
    let j: u64 = buf_list[1];
    let k: u64 = buf_list[2];

    if i <= j && i <= k {
        println!("Yes");
    } else {
        println!("No");
    }
}