#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  map<char, int> mp;
  for (int i = 0; i < n; ++i) {
    mp[cin.peek()]++;
    cin.ignore();
  }
  cout << (mp['R'] > mp['B'] ? "Yes" : "No") << endl;
}
