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