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

int n, cnt = 0;
string s;

int main() {
  cin >> n >> s;
  for(int i = 0; i < n; ++i)
    if(s[i] == 'R') ++cnt;
  if(cnt > n - cnt)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
  return 0;
}