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