#include <bits/stdc++.h>
using namespace std;
const long long int mod = 1e9 + 7;
int main() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  int r = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == 'R') r++;
  }
  if ((n + 1) / 2 < r)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
