#include <iostream>

using namespace std;

int main() {
  int N; cin >> N;
  string s; cin >> s;

  int r=0, b=0;
  for (int i=0; i<N; i++) {
    if (s[i] == 'R') r++;
    else b++;
  }

  cout << (r > b ? "Yes" : "No") << endl;
  return 0;
}
