import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] s = br.readLine().split(" ");
        
        int i = Integer.parseInt(s[0]);
        int j = Integer.parseInt(s[1]);
        int k = Integer.parseInt(s[2]);
        
        if((i <= j) && (i <= k)) System.out.println("Yes");
        else                     System.out.println("No");
    }
}