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

signed main(){
	int n,r = 0,b = 0;
	string s;
	cin >> n >> s;
	for(int i = 0;i < n;i++){
		((s[i] == 'R') ? r : b)++;
	}
	cout << ((r > b) ? "Yes" : "No") << endl;
}