#include<iostream>
using namespace std;
int main(){
  int n,i,r=0;
  string s;
  cin>>n;
  cin>>s;
  for(i=0;i<n;i++){
    if(s[i]=='R') r++;
  }
  if(r>(n-r)) cout<<"Yes"<<endl;
  else cout<<"No"<<endl;
  return 0;
}