#include<iostream>
using namespace std;
int main(){
  int n,r=0,b=0;
  char c;
  cin>>n;
  for(int i=0;i<n;i++){
    cin>>c;
    if(c=='R')r++;
    else b++;
  }
  cout<<((r>b)?"Yes":"No")<<endl;
  return 0;
}