import java.util.*;
import java.lang.*;

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 < n; i++) {
			if (s.charAt(i) == 'R') {
				red++;
			} else {
				blue++;
			}
		}
		if (red > blue) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}