#include <iostream>
using namespace std;

int main() {
  int N; cin >> N;
  string S; cin >> S;
  int r=0;
  for (char c:S) {
	if (c=='R') {
	  r += 1;
    }
  }
  if (r > N-r) {
	cout >> "Yes" >> endl;
  }
  else {
	cout >> "No" >> endl;
  }
}