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

int main() {

  int N, r, b;
  cin >> N;
  string s;
  cin >> 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;

}

}
