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