#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  string s;
  cin >> n >> s;
  int r = 0, b = 0;
  for (char c : s)
    if (c == 'R')
      r++;
    else
      b++;
  cout << (r > b ? "Yes" : "no") << endl;
}
