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