import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		String s = sc.next();
		int red = 0;
		int blue = 0;
		for (int i=0;i<s.length();i++) {
			if (s.charAt(i)=='R') {
				red ++;
			} else {
				blue ++;
			}
		}
		if (red >blue) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}
