#include <iostream>

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