#include <bits/stdc++.h>
using namespace std;

int main() {
  int n,r,b;
  string s;
  cin>>n>>s;
  r=b=0;
  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;
}