import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        String s = sc.next();
        int r = 0;
        int b = 0;
        for (int i = 0; i < n; i++) {
            if (s.charAt(i) == 'R') {
                r++;
            } else {
                b++;
            }
        }
        if (r > b) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }    
}
