#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  int r, b = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == 'R')
      r++;
    else
      b++;
  }
  if (r > b) {
    cout << "Yes" << endl;
  } else
    cout << "No" << endl;
}
