#include<bits/stdc++.h>
using namespace std;
int main(){
 int n;
  cin>>n;
  string s;
  cin>>s;
  int r=0,b=0;
  for(char i:s){
   	if(i=='R')r++;
    else b++;
  }
  if(r>b)cout<<"Yes"<<endl;
  else cout<<"No"<<endl;
}