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

int main() {
  int n;
  string s;
  cin >> n >> s;
  int r=0;
 for(int i=0;i<n;i++){
     if(s.at(i)== 'R') r++;
     else r--;
 }  
 if(r>0) cout << "Yes" << endl;
 else cout << "No" << endl;
}
