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

int main(){
  int n; cin>>n;
  string s; cin>>s;
  int red=0;
  for(int i=0;i<n;i++){
    if(s[i]=='R'){
      red++;
    }
  }
  if(red<=n-red){
    cout<<"No"<<endl;
  }else{
    cout<<"Yes"<<endl;
  }
}