#include<iostream>
using namespace std;

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