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 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");
  }
}