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