import java.util.Scanner;
import java.lang.String;
class Main{
    public static void main(String[] args){
        Scanner scan=new Scanner(System.in);
        int S=Integer.parseInt(scan.next());
        int T=Integer.parseInt(scan.next());
        String c=scan.next();
        if((c.equals("=")&&S==T)||(c.equals("<")&&S<T)||(c.equals(">")&&S>T)){
            System.out.println("YES");
        }else{
            System.out.println("NO");
        }
        return;
    }
}