#include <bits/stdc++.h>
using namespace std;

int main() {
  int N;
  string s;
  cin >> N >> s;
  int R = 0, B = 0;
  for (int i = 0; i < N; i++) if (s[i] == 'R') R++; else B++;
  if (R > B) cout << "Yes" << endl; else cout << "No" << endl;
}