#include <iostream>
#include <string>
using namespace std;

int main(){
  int n;
  string s;
  cin >> n >> s;
  int r=0, b=0;
  for(int i=0; i<n; i++){
    if(s[i]=='R')r++;
    else b++;
  }
  if(r>b)cout << "Yes";
  else cout << "No";
  return 0;
}