#include <iostream>
using namespace std;

int main()
{
  int n;
  string s;
  cin >> n >> s;
  int cnt = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == 'R') cnt++;
  }
  cout << (n < cnt * 2 ? "Yes" : "No") << endl;
}
