import java.util.*;

public class Ex {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int s = sc.nextInt();
		int t = sc.nextInt();

		String compare;
		if (s == t) {
			compare = "=";
		} else if (s < t) {
			compare = "<";
		} else {
			compare = ">";
		}

		String c = sc.next();
		if (c.equals(compare)) {
			System.out.println("YES");
		} else {
			System.out.println("NO");
		}

	}
}