import java.util.*;
 
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");
    }
  } 
}