#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[i]=='R')r++;
    else b++;
  } 
  if(r>b)cout<<"Yes"<<endl;
  else cout<<"No"<<endl;
}